tvm series owner's manuallgcdn.surplustraders.net/media/manufacturer-spec/ts553.pdf · 2016....

TVM450/S/TVM550/STVM550II/TVM550IIS

OWNER’S MANUAL

This manual is intended for use by the end user and qualified technicians. Itincludes all necessary information pertaining to TVM-series Modulator appli-cations and installation. Changes that occur after the date of printing will beincorporated in supplemental bulletins or later editions of this manual.

This document is the property of Standard Communications Corp., and em-bodies proprietary subject matter of Standard Communications Corp. All de-sign, manufacture, reproduction, use and sale rights regarding the same areexpressly reserved. This manual may not be reproduced without written con-sent from Standard Communications Corp. All copyright, patent and tradesecrets are expressly reserved by Standard Communications Corp.

Printed: 05/99

Page ii Owner’s Manual TVM450/S/TVM550/S/TVM550II/TVM550IIS

SAFETY CONSIDERATIONS

AVIS – RISQUE DE CHOC ELECTRIQUE –NE OAS OUVRIR

For user safety, one or more of the caution labels shown here may have been affixed to the side or rear panelsof this equipment. The significance of the two symbols enclosed by triangles is described below:

WARNING: TO REDUCE RISK OF FIRE OR ELECTRIC SHOCK, DO NOTEXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE!

See the IMPORTANT SAFEGUARDS on the following pages for additional safety instructions.

This symbol means that dangerous voltage levels are present within theequipment. These voltages are not insulated, and may be of sufficientstrength to cause bodily injury if touched. The symbol may also appear onschematics.

This symbol calls attention to a critical procedure, or means refer to theinstruction manual for operating or service information. Only qualified servicepersonnel are to install or service the equipment. The symbol may alsoappear in text and on schematics.

TVM450/S/TVM550/S/TVM550II/TVM550IIS Owner’s Manual Page iii

IMPORTANT SAFEGUARDSStandard Communications Corp. (SCC) strongly advises the user to read andunderstand the following safety instructions prior to installing and operating thisequipment.

1. Read These Instructions First − All safety and operating instructions shouldbe read before installing or operating this equipment.

2. Retain This Instruction Manual − Safety and operating instructions shouldbe retained for future reference.

3. Heed Warnings − All warnings on the equipment and in this Owner's Manualshould be adhered to.

4. Cleaning − Unplug the equipment from the AC power outlet before cleaning.Do not use liquid or aerosol cleaners.

5. Water and Moisture − Do not operate the equipment in high-humidity areas.

6. Ventilation − Do not block or cover slots and openings in this equipment.These are provided for ventilation and protection from overheating.

7. Power Sources − Operate this equipment only from the type of power sourceindicated on the rear panel.

8. Grounding or Polarization − This equipment may be equipped with apolarized AC line plug (a plug having one blade wider than the other). Thisplug will fit into the power outlet only one way. This is a safety feature. If youare unable to insert the plug into the outlet, try reversing the plug. If the plugstill does not fit, contact your electrician to replace your obsolete outlet. Donot defeat the safety purpose of a polarized plug.

9. Servicing − Refer all servicing to qualified SCC personnel. Opening or removingcovers may expose dangerous voltages.

10. Replacement Parts − When replacement parts are required, make sure theservice technician uses only replacement parts recommended by SCC. Un-authorized substitutions may result in fire, electric shock, or improper opera-tion of the unit.

11. Safety Check − Upon completion of any service or repair to the equipment,ask the service technician to perform safety checks to determine that theequipment is in proper operating condition.

12. Lightning − For added protection during a lightning storm or when theequipment is left unattended or unused for long periods, unplug it from thepower outlet and disconnect the cables between the equipment and the an-tenna subsystem. These precautions will prevent damage to the equipmentthat could be caused by lightning strikes or power line surges.

Page iv Owner’s Manual TVM450/S/TVM550/S/TVM550II/TVM550IIS

13. NOTE TO CATV SYSTEM INSTALLERS: This reminder is provided to call yourattention to NEC Articles 810-21, 820-22, and 820-40 that provide guidelinesfor proper grounding. In particular, these articles specify that the cable groundshall be connected to the building grounding system, as close to the point ofcable entry as practical (see Figure 1).

TO SATELLITERECEIVER

8 FEETGROUNDING ELECTRODEIN COMPLIANCE WITHNEC 810-21/NEC 820-22/NEC 820-40

GROUND CLAMPANTENNA DISCHARGEUNIT (SEE NOTE 2)

CONNECT TO THE NEARESTACCESSIBLE LOCATION ON THESTRUCTURE SYSTEM

FEED LINE

GROUND CONNECTIONS(SEE NOTE 1)

NOTES:1. USE #10 AWG (5.3 MM2) COPPER, #8

AWG (8.4 MM2) ALUMINUM, OR #17AWG (1.0 MM2) COPPER-CLAD STEELOR BRONZE WIRE, OR LARGER, ASTHE GROUND WIRE.

2. MOUNT THE ANTENNA DISCHARGE UNITAS CLOSE AS POSSIBLE TO WHERE THEFEED LINE ENTERS THE BUILDING.

9001

Figure 1. Typical Antenna Grounding

CONTENTS

TVM450/S/TVM550/S/TVM550II/TVM550/IIS Owner’s Manual Page v

SAFETY CONSIDERATIONS ...............................................................................ii

IMPORTANT SAFEGUARDS...............................................................................iii

GENERAL INFORMATION ................................................................................1-1

DESCRIPTION OF THE TVM450/TVM550...........................................................1-1

DESCRIPTION OF THE TVM550II/TVM550IIS ....................................................1-1

FEATURES.................................................................................................................1-2

SPECIFICATIONS ..................................................................................................2-1

CONTROLS AND CONNECTIONS ................................................................3-1

INSTALLATION AND OPERATION...............................................................4-1

INSTALLATION..........................................................................................................4-1

INTERCONNECTION...............................................................................................4-1

OPERATION...............................................................................................................4-3

TVM450/TVM550/TVM550II..................................................................................4-3TVM450S AND TVM550S .....................................................................................4-8TVM550IIS ..............................................................................................................4-10

DSG2000 OPERATION..........................................................................................4-11

TEST TONE..............................................................................................................4-12

CHANGING TO BTSC OUTPUT OPERATION..................................................4-12

CHANGING TO COMPOSITE OUTPUT.............................................................4-12

MONITORING ..........................................................................................................4-13

COMMENCING OPERATION...............................................................................4-13

DSG2000 USER-ACCESSIBLE JUMPERS........................................................4-13

OPTION INSTALLATION....................................................................................5-1

CBP45 .........................................................................................................................5-1CBP45-1......................................................................................................................5-3CSG60 .........................................................................................................................5-6CIF450-1....................................................................................................................5-10CALT45 .....................................................................................................................5-12SAP AUDIO (TVM550IIS).......................................................................................5-18AGC (TVM550IIS)....................................................................................................5-20

BLOCK DIAGRAMSLIMITED WARRANTYDOMESTIC GOLD STANDARD SUPPORT PROGRAMINTERNATIONAL GOLD STANDARD SUPPORT PROGRAM

Contents

Page vi Owner’s Manual TVM450/S/TVM550/S/TVM550II/TVM550/IIS

FIGURES1. Typical Antenna System Grounding ...............................................................iv3-1. Controls and Connections .............................................................................3-23-2. TVM Top Inside View.....................................................................................3-53-3. DSG2000 Front and Rear Panels ................................................................3-64-1. Typical Satellite Headend Installation.................................................................4-24-2. CMA60 Front and Rear Panels ....................................................................4-54-3. Alignment Without VITS Present..................................................................4-64-4. FCC Offset Switches......................................................................................4-74-4. CBP45 Option Package.................................................................................4-64-5. Agile IRDII, TVM450S/TVM550S and Jerrold Interconnection ...............4-94-6. Changing Jumpers .......................................................................................4-115-1. CBP45 Wiring and PC Board Locations .....................................................5-15-2. CBP45 Option Package Contents................................................................5-25-3. CBP45-1 Package Contents.........................................................................5-35-4. Connector Sites ..............................................................................................5-35-5. Preparing and Installing the Cable...............................................................5-45-6. CBP45-1 Installation.......................................................................................5-55-7. CSG60 Front and Rear Panels.....................................................................5-65-8. CSG60 Cable Routing ...................................................................................5-75-9. CIF450-1 Option Package Contents..........................................................5-105-10. CIF450-1 Installation....................................................................................5-115-11. CALT45 Option Package Contents..................................................................5-135-12. CALT45 Installation......................................................................................5-145-13. IF Combiner PC Board Component Locations.........................................5-145-14. Remote IF Select Installation......................................................................5-165-15. REMOTE IF SELECT and ALTERNATE COMP IF IN Rear

Panel Locations ..........................................................................................5-165-16. DSG2000/SAP2000 Component Locations .............................................5-195-17. Installing the AGC PC Board ......................................................................5-23

TABLES4-1. CATV Channels and Frequencies ...............................................................4-44-2. Audio Board Jumper Functions ..................................................................4-134-3. FM Board Jumper Functions.......................................................................4-134-4. Stereo Processor Board Jumper Functions .............................................4-135-1. CSG60 Option PC Board Connections .......................................................5-9

5-2. RF Combiner PC Board R302 Resistance ...............................................5-15

5-3. AGC in OFF Mode........................................................................................5-20

5-4. Steady-State Output vs. Input.....................................................................5-20

5-5. Output Headroom...................................................................................... 56-23

General Information

TVM450/S/TVM550/S/TVM550II/TVM550IIS Owner’s Manual Page 1-1

1 GENERAL INFORMATIONDESCRIPTION OF THE TVM450/S TVM550/SThe TVM450, TVM450S, TVM550, and TVM550S are rebroadcast-quality, phase-locked loop (PLL)-synthesized, frequency-agile, community antenna television(CATV) and cable system television-distribution modulators. The TVM450 modelsrange from 54 to 450 MHz, and the TVM550 models range from 54 to 550 MHz foruse in domestic systems.Both modulators use an open-architecture circuit and chassis design that allowssystem growth with multiple field configurations.The TVM450/S and TVM550/S are designed to be the primary building blocks ofan intelligent CATV distribution system. At the heart of these modulators isSCC's PLL-synthesized, dual-conversion up/down converter.The conversion process uses SCC's high-level mixing, which eliminates out-of-bandnoise floor and spurious emission problems. High-level mixing and superior designallow the TVM450/S and TVM550/S to meet the NTC-7-recommended specificationsfor a 550 MHz spectrum, without the use of external bandpass filters.The TVM550/S and TVM550/S modulators use a unique nonvolatile microprocessortuning circuit. Available is an optional Composite IF Loop kit that allows the externalinput of either aural, visual, or a composite IF signal through a special loop. Analternate IF option is also available.Channels are selected with a front panel rotary switch, and the modulators canbe set to only a legitimate output frequency. When a modulator is on line and thefrequency output is changed, a circuit mutes the RF output until the modulatorhas locked onto the new output channel frequency.Front panel potentiometers for varying video modulation, audio deviation, andvisual/aural carrier ratio have center detents. This type potentiometer allows the user toleave the front panel controls in their center positions while properly adjusting receiveroutputs to the modulator's correct input levels. RF output is also controlled by a likepotentiometer. The user can adjust the satellite receiver, for 1.0 V p-p video and0 dBm peak audio/Broadcast Television Standards Committee (BTSC) input levels,without the use of expensive test equipment.

DESCRIPTION OF THE TVM550II/TVM550IISSCC’s superior circuit construction is carried over from previous TVM models.These new models differ from the preceding TVM550 models in that they sport amuch-improved power supply that reduces noise and improves reliability. TheTVM550II uses the CMA60 audio demodulator, while the TVM550IISincorporates an SCC DSG2000BD digital stereo audio demodulator.

General Information

Page1-2 Owner’s Manual TVM450/S/TVM550/S/TVM550II/TVM550IIS

FEATURES• Quick and easy installation

• Compatible with all external BTSC and RF scrambling systems

• Factory-calibrated front panel controls with center detents

• Rebroadcast-quality noise-free and spurious-emission-free RF outputperformance, with rock-solid PLL-synthesized surface acoustical wave(SAW)-filtered 54 to 550 MHz, frequency-agile channel output, with directfront panel readout

• Virtually spurious-free RF performance across the entire output ranges

• Seven-segment, calibrated audio deviation bar meter, with BTSC inputindicator and factory-calibrated front panel controls with center detents

• RF output muting and visual lock indicator

• Visual and aural IF loop-through, compatible with all RF scramblingsystems

• Automatic/manual FCC offsets, with RF output stability exceeding allspecifications

• Share Assembly Program (SAP) audio and automatic gain control (AGC)available on the TVM550 series II models

• TVM550IIS has integrated digital stereo modulator – compatible with allRF scrambling systems, as well as with baseband scrambling

• Gold Standard Support Program, Seven-Year Guarantee, with SCC'soutstanding Lifetime Loaner Program

Specifications


2 SPECIFICATIONSTVM450/S/TVM550/S/TVM550II/TVM550IISSPECIFICATIONSGENERALPrimary Power 115 VACLine Frequency 50 to 60 HzPower Consumption

TVM450 40 W (With Option)TVM550/TVM550II/TVM550IIS 50 W (With Option)

Operating Temperature Range –14 to +122 F (–10 to +50 C)Operating Humidity Range (Noncondensing) 0 to 90%Operating Altitude Range 0 to 25,000 ft (0 to 7620 meters)Dimensions (H x W x D) 1.75 x 19 x 19 in. (44.5 x 482 x 480 mm)Weight 14.3 lb (6.5 kg)

VIDEO CHARACTERISTICSInput Level for 87.5% Modulation ± 1.0 V p-pInput Level Range 0.5 to 1.5 V p-pInput Impedance 75 ohmsFrequency Response 1.5 dBField-Time Waveform Distortion 3 IREShort-Time Waveform Distortion 4 IRELine-Time Distortion 5 IREVertical Interval Distortion 2 IRELuminance Nonlinearity 5%Differential Gain (87.5% Modulation; 10–90% APL) 3%Differential Phase (87.5% Modulation; 10–90% APL) 1.3 degreesChrominance-Luminance Intermodulation 3%Chrominance-Luminance Gain Inequality 9 IREChrominance-Luminance Delay Inequality ± 75 nsecChrominance Nonlinear Gain 5%Chrominance Nonlinear Phase 3.0 DegreesSignal-to-Noise Ratio (Luminance Weighted) ∫ 63 dB

AUDIO CHARACTERISTICSFFrreeqquueennccyy RReessppoonnssee ((5500 HHzz ttoo 9900 kkHHzz)) 11 ddBBHHaarrmmoonniicc DDiissttoorrttiioonn ((5500 HHzz ttoo 9900 kkHHzz)) 11%%PPrree--eemmpphhaassiiss 7755 ←←sseeccIInnppuutt IImmppeeddaannccee 660000 oohhmm ((bbaallaanncceedd))44..55 MMHHzz IInnppuutt LLeevveell ((1155 00..55 ddBB SSoouunndd CCaarrrriieerr RRee.. VViiddeeooCCaarrrriieerr))

3300 ttoo 6600 ddBBmmVV

BBaasseebbaanndd IInnppuutt LLeevveell ffoorr 2255 kkHHzz DDeevviiaattiioonn 00 ±± 11 ddBBmmBBaasseebbaanndd IInnppuutt RRaannggee ffoorr 2255 kkHHzz DDeevviiaattiioonn ±± 1100 ±± 22 ddBBCCoommmmoonn MMooddee RReejjeeccttiioonn aatt 11 kkHHzz ∫∫ 4400 ddBBHHuumm aanndd NNooiisseeTTVVMM445500//TTVVMM445500SS ((5500 HHzz 9900 kkHHzz)) 00 ddBBTTVVMM555500//TTVVMM555500IIII//TTVVMM555500IIIISS ((5500 HHzz 1155 kkHHzz)) 00 ddBB44..55 MMHHzz SSuubbccaarrrriieerr SSttaabbiilliittyy 225500 HHzzIICCPPMM 11..55 ddeeggrreeeessSSiiggnnaall--ttoo--NNooiissee RRaattiioo ((PPrree--eemmpphhaassiiss OONN)) ((5500 HHzz1155 kkHHzz))((VViiddeeoo:: EEIIAA CCoolloorr BBaarr))

∫∫ 6600 ddBB

((CCoonnttiinnuueedd))

Specifications

Page 2-2 Owner’s Manual TVM450/S/TVM550/S/TVM550II/TVM550IIS

TVM450/S/TVM550/S/TVM550II/TVM550IISSPECIFICATIONS (Continued)RF CHARACTERISTICSFFrreeqquueennccyy RRaannggee

TVM450/TVM450S 5544 ttoo 445500 MMHHzzTVM550/TVM550S/TVM550II/TVM550IIS 5544 ttoo 555500 MMHHzz

OOuuttppuutt IImmppeeddaannccee 7755 oohhmm ((UUnnbbaallaanncceedd))OOuuttppuutt RReettuurrnn LLoossss

TVM450/TVM450S ∫∫ 1144 ddBBTVM550/TVM550S/TVM550II/TVM550IIS ∫∫ 1122 ddBB

OOuuttppuutt LLeevveell ∫∫ ±± 6600 ddBBmmVVSSoouunndd CCaarrrriieerr LLeevveell ((RRee.. VViiddeeoo CCaarrrriieerr)) ––1100 ttoo ––2200 ddBBSSoouunndd CCaarrrriieerr LLeevveell ((CCoonnttrrooll aatt CCeenntteerr DDeetteenntt PPoossiittiioonn)) ––1155 ±± 11..55 ddBBSSttaabbiilliittyy ((554455..5500 MMHHzz)) 22..00 kkHHzzSSppuurriioouuss OOuuttppuutt ((++6600 ddBBmmVV ttyyppiiccaall)) ––6600 ddBBccOOuuttppuutt CC//NN IInn--BBaanndd ((44 MMHHzz BBWW 33 MMHHzz ffrroomm VViissuuaall CCaarrrriieerr))

TVM450/TVM450S ––6688 ddBBccTVM550/TVM550S/TVM550II/TVM550IIS ––6655 ddBBcc

OOuuttppuutt CC//NN OOuutt--ooff--BBaanndd ((44..00 MMHHzz BBWW ffrroomm VViissuuaall CCaarr--rriieerr)) 2200//++2255 MMHHzz

8800 ddBBcc

VVSSBB EEmmiissssiioonn ((33..5588 MMHHzz)) ––3388 ddBBVVSSBB EEmmiissssiioonn ((++44..7755 MMHHzz)) ––2200 ddBBVVSSBB EEmmiissssiioonn ((11..2255 MMHHzz)) ––22..00 ddBBOOuuttppuutt MMuuttee

TVM450/TVM450S ––5500 ddBBTVM550/TVM550S/TVM550II/TVM550IIS ––7700 ddBB

IIFF CCHHAARRAACCTTEERRIISSTTIICCSSOOuuttppuutt LLeevveell ((4455..7755 MMHHzz)) 4400 ±± 11 ddBBmmVVOOuuttppuutt LLeevveell ((4411..2255 MMHHzz)) 2255 ±± 11 ddBBmmVVIInnppuutt LLeevveell ((4455..7755 MMHHzz)) 4400 ±± 11 ddBBmmVVIInnppuutt LLeevveell ((4411..2255 MMHHzz)) ww//CCoonnttrrooll aatt CCeenntteerr DDeetteenntt PPoossii--ttiioonn

2255 ±± 11 ddBBmmVV

OOuuttppuutt RReettuurrnn LLoossss ((4411..0000 ttoo 4477..0000 MMHHzz)) ∫∫ 1144 ddBBIInnppuutt RReettuurrnn LLoossss ((4411..0000 ttoo 4477..0000 MMHHzz)) ∫∫ 1144 ddBB

CALT45 IF INPUT KITTThhee CCAALLTT4455 kkiitt ooffffeerrss aann ooppttiioonnaall IIFF iinnppuutt tthhaatt ccaannmmaannuuaallllyy oorr aauuttoommaattiiccaallllyy sswwiittcchh bbeettwweeeenn aalltteerrnnaattee rree--cceeiivveerrss//mmoodduullaattoorrss.. TThhiiss pprreevveennttss iinnccoonnvveenniieenntt tteemmppoorraarryyoonn--aaiirr ddoowwnn ttiimmee.. TThhiiss kkiitt aallssoo aalllloowwss iinntteerrffaacciinngg wwiitthh CCiivviillDDeeffeennssee sswwiittcchhiinngg.. TThheerree aarree nnoo sseeppaarraattee ssppeecciiffiiccaattiioonnssffoorr tthhiiss kkiitt.. NNoottee tthhaatt tthhiiss kkiitt wwiillll nnoott wwoorrkk iiff tthhee CCIIFF445500--11ooppttiioonn iiss iinnssttaalllleedd..

CIF450-1 COMPOSITE IF LOOP KITTThhee CCIIFF445500--11 CCoommppoossiittee LLoooopp ooppttiioonn aalllloowwss tthhee oowwnneerr ttooeeaassiillyy iinnsseerrtt aa ccoommppoossiittee IIFF ssiiggnnaall.. TThheerree aarree nnoo sseeppaarraatteessppeecciiffiiccaattiioonnss ffoorr tthhiiss ooppttiioonn.. TThhee ppaarrttss iinn tthhiiss ooppttiioonnppaacckkaaggee aarree iinncclluuddeedd iinn tthhee CCBBPP4455--11 ooppttiioonn ppaacckkaaggee

Specifications


CSG60 STEREO SPECIFICATIONSAUDIO INPUTPPoowweerr RReeqquuiirreemmeenntt 9900––113322 VVAACC 5500//6600 HHzzPPoowweerr CCoonnssuummppttiioonn 1155..55 WWIInnppuutt LLeevveell RRaannggee ((aatt 330000 HHzz ffoorr 110000%% MMoodduullaattiioonn))

LeftRightMono

–10 ± 2 to + 10 ± 2 dBm

IInnppuutt ::LLeevveell aatt CCeenntteerr DDeetteenntt PPootteennttiioommeetteerr PPoossiittiioonnLeftRight 00 ±± 00..55 ddBBmm

Mono 00 ±± 22 ddBBmmIInnppuutt IImmppeeddaannccee ((BBaallaanncceedd))

LeftRightMono

660000 oohhmm

IInnppuutt LLeevveell IInnddiiccaattoorr ((11sstt)) ((aatt 330000 HHzz LLeefftt == RRiigghhtt))LeftRight 110000 ±± 55%%

VIDEO INPUT AND OUTPUTIInnppuutt IImmppeeddaannccee

TTeerrmmiinnaattiioonn SSwwiittcchh ((SS550011:: HHIIGGHHCCoommbbiinneerr SSwwiittcchh ((SS550022)):: OOFFFF ∫∫ 44..55 kk oohhmmss

TTeerrmmiinnaattiioonn SSwwiittcchh ((SS550011)):: HHIIGGHHCCoommbbiinneerr SSwwiittcchh ((SS550022)):: 7755 WW 7755 oohhmmss

TTeerrmmiinnaattiioonn SSwwiittcchh ((SS550011:: HHIIGGHHCCoommbbiinneerr SSwwiittcchh ((SS550022)):: OONN ∫∫ 337700 oohhmmss

IInnppuutt LLeevveell RRaannggee 00..55 ttoo 11..55 VV pp--pp44..55 MMHHzz OOuuttppuutt LLeevveell TTeerrmmiinnaattiioonn SSwwiittcchh ((SS550011)):: HHiigghh;;

CCoommbbiinneerr SSwwiittcchh ((SS550022)):: OONN 7700 mmVV

4.5 MHz OUTPUT44..55 MMHHzz FFrreeqquueennccyy AAccccuurraaccyy ±± 550000 HHzzOOuuttppuutt LLeevveell ((LLEEVVEELL PPootteennttiioommeetteerr FFuullllyy CClloocckkwwiissee)) ∫∫ 4433 ddBBmmVVOOuuttppuutt LLeevveell RRaannggee ∫∫ 1100 ddBBOOuuttppuutt IImmppeeddaannccee 7755 oohhmmSSppuurriioouuss OOuuttppuutt 6600 ddBBPPiilloott SSiiggnnaall DDeevviiaattiioonn 55 ±± 00..2255 kkHHzzFFrreeqquueennccyy RReessppoonnssee LLeefftt OOnnllyy oorr RRiigghhtt OOnnllyy aatt 1177 ddBBmm IInnppuutt

50 Hz to 10 kHz ±± 11..00 ddBB10 Hz to 13 kHz ++ 11..00 ttoo ––22..00 ddBB

SStteerreeoo SSeeppaarraattiioonn aatt 1177 ddBBmm IInnppuutt50 Hz to 100 Hz ∫∫ 3300 ddBB100 Hz to 8 kHz ∫∫ 2200 ddBB

DDiissttoorrttiioonn aatt 1177 ddBBmm IInnppuutt50 Hz to 7.5 kHz 00..7755%%7.5 kHz to 13 kHz 11..55%%

SSiiggnnaall--ttoo--NNooiissee RRaattiioo ∫∫ 6622..55 ddBBUUnnmmoodduullaatteedd SStteerreeoo SSuubbccaarrrriieerr ∫∫ 00..2255 kkHHzzCCrroossssttaallkk

Subchannel Into Main ChannelMain Channel Into Subchannel ∫∫ 4400 ddBB


Specifications


CSG60 STEREO SPECIFICATIONS (Continued)

BASEBAND OUTPUTOutput Level (Main Channel) 00 ±± 11..00 ddBBmmVVOutput Impedance (Unbalanced) 660000 ±± 55 oohhmmss

FFrreeqquueennccyy RReessppoonnssee LLeefftt OOnnllyy oorr RRiigghhtt OOnnllyy aatt 1177 ddBBmm IInnppuutt50 Hz to 10 kHz ±± 11..00 ddBB10 Hz to 13 kHz ++11..00 ttoo ––22..00 ddBB

SStteerreeoo SSeeppaarraattiioonn aatt 1177 ddBBmm50 Hz to 100 Hz ∫∫ 2266 ddBB100 Hz to 8 kHz ∫∫ 3300 ddBB8 kHz to 13 kHz ∫∫ 2200 ddBB

DDiissttoorrttiioonn aatt 1177 ddBBmm50 Hz to 7.5 kHz 00..55%%7.5 kHz to 13 kHz 00..7755%%Signal-to-Noise Ratio ∫∫ 7722..55 ddBB

CBP45 SPECIFICATIONSWWhheenn ooppeerraatteedd wwiitthh ssoommee eeaarrlliieerr IIFF ssccrraammbblliinngg ssyysstteemmss tthheemmoodduullaattoorr sshhoouulldd bbee eeqquuiippppeedd wwiitthh tthhee ooppttiioonnaall CCBBPP4455 VVSSBBffiilltteerr.. IInnssttaalllleedd oonn tthhee IIFF iinnppuutt lloooopp ttoo ccoorrrreecctt ffoorr iinnhheerreennttssccrraammbblliinngg pprroocceessss nnooiissee tthhee CCBBPP4455 eelliimmiinnaatteess aaddjjaacceennttcchhaannnneell iinntteerrffeerreennccee ccaauusseedd bbyy tthhee ssccrraammbblliinngg.. TThhee mmoodduulleemmaayy bbee ffiitttteedd iinn tthhee ffiieelldd oorr ffaaccttoorryy--iinnssttaalllleedd aatt tthhee ttiimmee ooff oorrddeerr..TToo aallssoo hhaavvee IIFF lloooopp ccoonnnneeccttoorrss uussee CCBBPP4455--11PPoowweerr RReeqquuiirreemmeenntt 1122 ±± 00..22 VVCCuurrrreenntt DDrraaiinn 3300 mmAAIInnppuutt IImmppeeddaannccee 7755 oohhmmOOuuttppuutt IImmppeeddaannccee 7755 oohhmmIInnppuutt RReettuurrnn LLoossss ∫∫ 99 ddBBOOuuttppuutt RReettuurrnn LLoossss ∫∫ 1155 ddBBGGaaiinn VVaarriiaattiioonn ++ 00..55 ttoo ––11..00 ddBBPPaassssbbaanndd FFllaattnneessss

41.25 to 46.25 MHz (p-p) 11..55 ddBBat fv 39.5 MHz Ref. fv ±± 00..33 ddBB

OOuutt--ooff--BBaanndd AAtttteennuuaattiioonn ((3300..55 MMHHzz ttoo 4477..55 MMHHzz)) ∫∫ 2200 ddBB

CBP45-1 SPECIFICATIONSTThhee CCBBPP4455--11 kkiitt iinncclluuddeess tthhee CCBBPP4455 ooppttiioonn pplluuss ttwwooccoonnnneeccttoorrss aanndd wwiirriinngg ffoorr iinnssttaalllliinngg tthhee CCIIFF445500--11 CCoomm--ppoossiittee IIFF LLoooopp ooppttiioonn..

FX450 FORMAT PROMTThhee FFXX445500 PPRROOMM FFoorrmmaatt ooppttiioonn aalllloowwss tthhee oowwnneerr tthheefflleexxiibbiilliittyy ttoo uussee tthhee ssaammee ffrreeqquueennccyy ppllaann ffoorrmmaatt aass ootthheerrvveennddoorr eeqquuiippmmeenntt.. TThheerree aarree nnoo sseeppaarraattee ssppeecciiffiiccaattiioonnssffoorr tthhiiss kkiitt..

Specifications


DSG2000 SPECIFICATIONSGENERALDDiimmeennssiioonnss ((HH xx WW xx DD)) 11..7755 xx 1166..66 xx 1144 iinn.. ((4455 xx 442222 xx 335566 mmmm))WWeeiigghhtt 99..0055 llbb ((44..22 kkgg))OOppeerraattiinngg TTeemmppeerraattuurree RRaannggee 1144 ttoo 112222 ººFF (( ––1100 ttoo ++5500 ººCC))OOppeerraattiinngg HHuummiiddiittyy RRaannggee ((NNoonnccoonnddeennssiinngg)) 00 ttoo 6600%%OOppeerraattiinngg AAllttiittuuddee RRaannggee 00 ttoo 1155,,000000 ffeeeett ((00 ttoo 44,,557722 mmeetteerrss))PPoowweerr RReeqquuiirreemmeennttss 111100 VVAACC,, 5500//6600 HHzz,,RRaaddiiaattiioonn RReegguullaattiioonnss FFCCCC CCllaassss BBRRaaddiiaattiioonn IImmmmuunniittyy NNoonneeAAcccceessssoorriieess IInncclluuddeedd NNoonnee

CONNECTORSRReeaarr PPaanneell

AAuuddiioo IInnppuutt EEuurroossttyyllee LLoocckkiinngg BBaarrrriieerr SSttrriippVViiddeeoo IInnppuutt BBNNCC FFeemmaalleeVViiddeeoo//BBTTSSCC OOuuttppuutt BBNNCC FFeemmaallee44..55 MMHHzz AAuurraall CCaarrrriieerr IInnppuutt FF--ttyyppee FFeemmaalleeCCOONNTT IInnppuutt EEuurroossttyyllee LLoocckkiinngg BBaarrrriieerr SSttrriipp ((CCoonnttrroollss AAUUXX IInnppuutt

SSeelleeccttiioonn))FFrroonntt PPaanneell

HHeeaaddpphhoonnee OOuuttppuutt ((SStteerreeoo)) 33..55 mmmm SStteerreeoo PPhhoonnee JJaacckkHHeeaaddpphhoonnee OOuuttppuutt ((SSAAPP)) 33..55 mmmm SStteerreeoo PPhhoonnee JJaacckk

AUDIO INPUTS (L, R, SAP, AUX – Processed on the Audio PCBoard)IInnppuutt SSttaaggee TTyyppee EElleeccttrriiccaallllyy BBaallaanncceedd DDiiffffeerreennttiiaallDDiiffffeerreennttiiaall IInnppuutt IImmppeeddaannccee >> 1100 kk ττ ((660000 ττ,, SSeelleeccttaabbllee vviiaa JJuummppeerr))CCoommmmoonn MMooddee IInnppuutt IImmppeeddaannccee 2200 kk ττ 22%%IInnppuutt OOvveerrllooaadd ((2200 HHzz ttoo 1155 kkHHzz)) 2200 VV pp--pp 22%%IInnppuutt NNooiissee ((2200 HHzz ttoo 1155 kkHHzz)) ––110000 ddBBVV

VIDEO INPUTS (Processed on the Stereo PC Board)IInnppuutt SSttaaggee TTyyppee SSiinnggllee--EEnnddeeddIInnppuutt IImmppeeddaannccee 1100 kk ΩΩ 55%% ((7755 ττ,, SSeelleeccttaabbllee vviiaa JJuummppeerr))IInnppuutt LLeevveell 11..00 00..55 VV pp--pp

CTL INPUT (Processed on the Front Panel PC BoardIInnppuutt IImmppeeddaannccee >> 1100 kk ττIInnppuutt LLeevveell SSeeee CCoonnttrrooll FFuunnccttiioonnssCCoonnttrrooll FFuunnccttiioonn WWhheenn CCTTLL iiss ggrroouunnddeedd,, AAUUXX IInnppuutt iiss ffeedd ttoo LL,, RR,, aanndd SSAAPP

cchhaannnneellss.. WWhheenn CCTTLL iiss ooppeenn oorr aatt ++55 VV,, LL,, RR,, aanndd SSAAPP IInnppuuttssaarree ffeedd ttoo tthheeiirr rreessppeeccttiivvee cchhaannnneellss..

COMPOSITE OUTPUT (Generated on the Stereo PC Board)OOuuttppuutt SSttaaggee TTyyppee SSiinnggllee--EEnnddeeddOOuuttppuutt IImmppeeddaannccee 7755 ττ 55%%MMaaxxiimmuumm OOuuttppuutt VVoollttaaggee iinnttoo aa 1100 kk ττ LLooaadd ++ 33 ddBBVVMMiinniimmuumm RReessiissttiivvee LLooaadd 660000 ττMMaaxxiimmuumm CCaappaacciittiivvee LLooaadd 110000 ppFF


Specifications


DSG2000 (Continued)4.5 MHz AURAL CARRIER OUTPUT (Generated on the FM PC Board)AAuurraall CCaarrrriieerr FFrreeqquueennccyy 44..55 MMHHzz 220000 HHzzOOuuttppuutt LLeevveell ((7755 ττ LLooaadd)) 3300 ttoo 4455 ddBBmmVVMMoodduullaattiioonn DDeepptthh 110000%% LL==RR ccaauusseess 5500 kkHHzz DDeevviiaattiioonn ((IInntteerrnnaallllyy AAddjjuusstt--

aabbllee 1155%%;; FFaaccttoorryy sseett WWiitthhiinn 11%%..OOuuttppuutt SSttaaggee TTyyppee SSiinnggllee--EEnnddeeddOOuuttppuutt IImmppeeddaannccee 7755 ττ 55%%MMaaxxiimmuumm OOuuttppuutt VVoollttaaggee iinnttoo aa 7755 ττ LLooaadd ++3399 ddBBmmVVMMiinniimmuumm RReessiissttiivvee LLooaadd 7755 ττVViiddeeoo CCoommppoossiittee CCaappaabbiilliittyy IInntteerrnnaall JJuummppeerr AAlllloowwss VViiddeeoo IInnppuutt wwiitthh AAuurraall CCaarrrriieerr

STEREO ENCODEREEnnccooddiinngg MMeetthhoodd DDSSPP IImmpplleemmeennttaattiioonn ooff DDBBXX--TTVV//ZZeenniitthh AAllggoorriitthhmm

PPeerr FFCCCCSSeeppaarraattiioonn**

5500 HHzz ttoo 220000 HHzz 4400 ddBB220000 HHzz ttoo 22 kkHHzz 3355 ddBB

22 kkHHzz ttoo 1144..55 kkHHzz 2288 ddBBDDyynnaammiicc RRaannggee ((MMaaxx.. LL++RR IInnppuutt SSiiggnnaall aatt 440000 HHzz ttoo1155 kkHHzz UUnnwwaanntteedd NNooiissee FFlloooorr,, EEnnccooddee//DDeeccooddee))

8800 ddBB

TTHHDD ((EEnnccooddee//DDeeccooddee)) aatt 6666..77%% MMoodduullaattiioonn**110000 HHzz 00..11%%11 kkHHzz 00..22%%1100 kkHHzz 11..00%%

FFrreeqquueennccyy RReessppoonnssee5500 HHzz ttoo 1144 kkHHzz 00..33 ddBB2200 HHzz ttoo 1155..22 kkHHzz ––33 ddBB

PPiilloott FFrreeqquueennccyy 1155..773344 kkHHzz ((LLoocckkeedd ttoo VViiddeeoo IInnppuutt aatt 22ffhh)) 33..00HHzz ((VViiddeeoo LLoocckk RRaannggee))

PPiilloott IInnjjeeccttiioonn 55..00 00..33 kkHHzzLL––RR SSuubbccaarrrriieerr FFrreeqquueennccyy 3311..446655 kkHHzz ((LLoocckkeedd ttoo VViiddeeoo IInnppuutt aatt 22ffhh)) 66..00

HHzz ((VViiddeeoo LLoocckk RRaannggee))LL––RR SSuubbccaarrrriieerr MMoodduullaattiioonn DDoouubbllee--SSiiddeebbaanndd,, SSuupppprreesssseedd--CCaarrrriieerr AAMMLL––RR MMoodduullaattiioonn LLeevveell 5500 33%% ((LL== ––RR CCaauusseess 110000%% SSuubbccaarrrriieerr

MMoodduullaattiioonn))AAddjjuussttmmeennttss NNoonnee

TEST TONE MODEFFrreeqquueennccyy ((BBeesssseell NNuullll TToonnee)) 1100..339955 kkHHzz 00..33 HHzzLLeevveell 2255 00..55 kkHHzzIInnjjeeccttiioonn LL++RR OOnnllyy ((MMoonnoo SSiiggnnaall))AAddjjuussttmmeennttss NNoonnee

HEADPHONE OUTPUTOOuuttppuutt IImmppeeddaannccee 330000 ττOOuuttppuutt LLeevveell ((OOppeenn CCiirrccuuiitt LLooaadd)) 00 ddBBVV == 110000%% MMoodduullaattiioonnMMiinniimmuumm RReessiissttiivvee LLooaadd 330000 ττ

* Measured at baseband BTSC

Specifications


DSG2000 OPTIONSAGC2000 (Automatic Gain Control)TThhiiss ooppttiioonn pprroovviiddeess aauuttoommaattiicc ccoonnttrrooll ooff tthhee DDSSGG22000000oouuttppuutt.. TThheerree aarree nnoo sseeppaarraattee ssppeecciiffiiccaattiioonnss ffoorr tthhiissppaacckkaaggee..

SAP2000 ENCODER (Processed on the SAP PC Board)TThhiiss ooppttiioonn aalllloowwss oouuttppuutt ooff SSAAPP aauuddiioo.. SSppeecciiffiiccaattiioonnss ffoollllooww::EEnnccooddiinngg MMeetthhoodd DDSSPP IImmpplleemmeennttaattiioonn ooff DDBBXX--TTVV//ZZeenniitthh AAllggoorriitthhmm

PPeerr FFCCCCDDyynnaammiicc RRaannggee ((MMaaxx.. LL++RR IInnppuutt SSiiggnnaall aatt 440000 HHzz ttoo1155 kkHHzz UUnnwwaanntteedd NNooiissee FFlloooorr,, EEnnccooddee//DDeeccooddee))

7700 ddBB

TTHHDD ((EEnnccooddee//DDeeccooddee)) aatt 6666..77%% MMoodduullaattiioonn110000 HHzz 00..33%%11 kkHHzz 00..55%%1100 kkHHzz 00..66%%

FFrreeqquueennccyy RReessppoonnssee5500 HHzz ttoo 1144 kkHHzz 00..33 ddBB2200 HHzz ttoo 1155..22 kkHHzz ––33 ddBB

LL––RR SSuubbccaarrrriieerr FFrreeqquueennccyy 7788..6677 kkHHzz ((LLoocckkeedd ttoo VViiddeeoo IInnppuutt aatt 55ffhh)) 1155 HHzz((VViiddeeoo LLoocckk RRaannggee))

LL––RR SSuubbccaarrrriieerr MMoodduullaattiioonn FFMMLL––RR MMoodduullaattiioonn LLeevveell 110000%% ((SSAAPP CCaauusseess 1155 kkHHzz SSuubbccaarrrriieerr DDeevviiaattiioonn

00..44 kkHHzz))AAddjjuussttmmeennttss NNoonnee

Controls and Connections


3 CONTROLS AND CONNECTIONSControl/Connector LocationsThe TVM-series have convenient control locations provide ease of operation.

Front Panel for Models with CMA60 Audio ModuleRefer to Figure 3-1 for the following description:1. POWER – Red LED (TVM450) or Green LED (TVM550 models). Indicates that

the unit is plugged into the AC power and is operational.2. VIDEO OVER MOD – Red LED. Lights when the video depth of modulation

level exceeds 87.5 percent modulation.3. OFFSET – Green LED. Lights when the selected channel has a prepro-

grammed FCC-assigned offset frequency. The light goes out when the OFFSETswitch (27) is in the OFF or AUTO position. See rear panel callout (27) for addi-tional switch settings.

4. RF OUTPUT – Green LED. Lights when RF output is not muted, and whenthe phase-locked loop (PLL) is locked on-channel. The RF output is con-trolled by the CHANNEL SELECT switch (6) or during a power-up condition.When this LED is off, the RF output is muted to –75 dBc, eliminating an un-wanted output during a tuning sequence or powering-up condition.

5. CHANNEL OUTPUT – Red, dual-digit LED numeric display. Displays thecurrent channel number being output to the RF OUT jack.

6. CHANNEL SELECT – Rotary switch. Rotating this switch clockwise orcounterclockwise changes the channel number sequentially higher or lower,respectively. When rotated to a different channel, RF OUT is muted for ap-proximately four seconds. The RF OUTPUT LED goes out during this period.

7. VIDEO MODULATION – Potentiometer. Adjusts the video modulation level.The center detent position is preset for an 87.5 percent depth of modulation,with a 1.0 V peak-to-peak video input signal.

8. VIDEO/AUDIO RATIO – Potentiometer. The center detent position is cali-brated for –15 dBc aural carrier output (maintained throughout the RFLEVEL (9) range).

9. RF LEVEL – Potentiometer. Rotating clockwise or counterclockwise in-creases or decreases RF OUTPUT level (+45 to +60 dBmV). It is recom-mended that these units be operated at +58 to +60 dBmV.

10. AUDIO DEVIATION – Seven-segment LED bar display. Indicates the peakaural deviation in percent. When the sixth bar of this display is lit, a repre-sentation of 100 percent or 25 kHz peak aural deviation is present. The sev-enth bar represents overdeviation and should light only occasionally. The bardisplay is precalibrated with an internal 15 kHz low-pass filter for accuratemonaural or BTSC (L + R) indication.



9031

Figure 3-1. Controls and Connections

11. AUDIO DEVIATION – Potentiometer. The center detent position is cali-brated for 25 kHz peak deviation on the aural output, with 0 dBm peak pro-gram audio input level. Rotating this pot changes the input levels.



12. BTSC INPUT – Green LED. Lights when the rear panel AUDIO switch (17) or4.5 MHz switch (18) are in BTSC or EXT positions, respectively.

13. VIDEO TEST – 75-ohm BNC connector. Used to monitor the video output.14. –20 dB RF TEST – 75-ohm F connector. Used to monitor RF output. Signal

level is –20 dB.

Rear Panel for Models with CMA60 Audio Module15. MONO IN (+) and IN (–) – Screw terminals. A monaural audio input.16. GND – Screw terminal. An external ground connection.17. AUDIO – Slide switch. Turns pre-emphasis on or off.18. 4.5 MHz – Slide switch. Selects either the internally generated 4.5 MHz car-

rier or an input from the EXT 4.5 MHz IN jack.19. EXT 4.5 MHz IN – 75-ohm F connector. An input for a 4.5 MHz aural carrier

from an external source. The required input level is +30 to +60 dBmV.20. VIDEO IN – 75 ohm F connector. An input for the video signal.21. RF OUT – 75 ohm F connector. For the

54 to 450 MHz (TVM450) or 550 MHz (TVM550) modulator output signal.22. REMOTE – Special connector. This jack is used when the CALT45 option is

installed.23. VISUAL IF IN – 75 ohm F connector. For a visual IF input from other

equipment. The input level required is 40 ± 1.0 dBmV.

NOTEIf an IF input is used, the frequency stability of the modulator is determinedby the frequency stability of the IF signal source.

24. VISUAL IF OUT – 75 ohm F connector. The output of the internal Visual IFsignal. Output level is 40 ±1.0 dBmV.

25. AURAL IF IN – 75 ohm F connector. An input for an external Aural IF sig-nal. The required input level is 25 ± 1.0 dBmV.

26. AURAL IF OUT – 75 ohm F connector. The output of the internal Aural IFsignal. The required output level is 25 ± 1.0 dBmV.

27. OFFSET – Rotary switch. Manually selects the offset frequency. This allowsthe equipment ROM to choose the FCC offset frequency automatically whenin the AUTO position, or turns the unit's ROM-pro-grammed FCC offset fre-quency off when in the OFF position.

28. FUSE HOLDER – Houses the equipment's primary power fuse.



Front Panel for TVM450S/TVM550S/TVM550II Models withCSG60 Audio ModuleRefer to Figure 3-1 for the following description:29. LEFT CHANNEL – Seven-segment LED bar display. Indicates the peak

audio deviation in percent. When the sixth bar is lit, a representation of therear panel left input (38), when combined with the right channel input (37),produces 100 percent or25 kHz peak aural deviation. The seventh bar indicates overdeviation andshould light only occasionally. The bar display is precalibrated with an inter-nal 15 kHz low-pass filter for accurate monaural or BTSC (L + R) indication.

30. INPUT LEVEL (L) – Potentiometer. For adjusting the left channel audio in-put level. The center detent position is calibrated for 25 kHz peak deviationof the aural output, with 0 dBm peak program audio level. Rotating the po-tentiometer varies input levels.

31. MONO INPUT LEVEL – Potentiometer. For adjusting the mono channelaudio input level. The center detent position is calibrated for 25 kHz peakdeviation of the aural output, with 0 dBm program audio input level. Rotatingthe potentiometer varies input levels.

32. STEREO INPUT – Red LED. Lights when a BTSC stereo signal is present.33. VIDEO LOCK – Green LED. Lights when the BTSC signal is synchronized

with the internal horizontal sync frequency.34. RIGHT CHANNEL – Seven-segment LED bar display. A representation of

the right channel audio input level. When the sixth bar is lit, a 25 kHz peakdeviation output level has been achieved, indicating a 0 dBm input level. Theseventh bar indicates overdeviation when lit.

35. 4.5 MHz OUTPUT LEVEL – Potentiometer. Adjusts the 4.5 MHz outputlevel.

36. INPUT LEVEL (R) – Potentiometer. Adjusts the right channel audio inputlevel. This adjustment is made when a BTSC stereo format is selected. Inthe center detent position, the input level is preset for 0 dBm.

Rear Panel for TVM450S/TVM550S Models with CSG60Audio ModuleRefer to Figure 3-1 for the following description:37. R (+) and R (–) – Screw terminals. A 600-ohm balanced, right-channel

audio input for the BTSC stereo generator.38. L (+) and L (–) – Screw terminals. A 600-ohm balanced left-channel audio

input for the BTSC stereo generator.39. MONO (+) and (–) – Screw terminals. A 600-ohm balanced monaural audio

input for the BTSC generator. This is used for commercial insertion.40. GND – Screw terminal. An external ground connection for the modulator.



41. CONT (Control) – Screw terminal. When grounded, switches from the leftand right audio inputs to the monaural audio input.

42. 4.5 MHz OUT – 75-ohm F connector. Not used.43. VIDEO OUT – 75-ohm F connector. Not used.44. VIDEO IN – 75-ohm F connector. Video input connection.

Internal (All Units)Refer to Figure 3-2 for the location of the PROM/ROM switch:

POWERTRANSFORMER

PU00

PM00

ROM

PROM

JU04SU02

45

FRONT

REAR9002

Figure 3-2. TVM Top Inside View45. PROM/ROM – Slide switch. Selects either the FCC-assigned standard fre-

quency format or a format stored in the optional FX450 PROM. Power to theequipment needs to be disconnected and reconnected to activate the PROMafter installation.

TVM550IIS with DSG2000 Digital Stereo ModuleSee Figure 3-3 for locations of items described in this section.

DSG2000 Front Panel1. L LEVEL – Potentiometer. Adjusts level for the left audio channel, which is

indicated on the seven-string LED LEFT AUDIO meter (3).2. RIGHT AUDIO – Seven-string LED meter. Indicates the modulation level of

the right audio channel. The first five LEDs are green, and the last two arered. The first red LED indicates 100% modulation (0 dB), and the last indi-cates overmodulation (+3.0 dB).



9982A

Figure 3-3. DSG2000 Front and Rear Panels



3. LEFT AUDIO – Seven-string LED meter. Indicates the modulation level ofthe left audio channel. The function is the same as in (2).

4. SAP AUDIO – Seven-string LED meter. Indicates the modulation level of theoptional SAP audio channel. The function is the same as in (2).

5. TEST TONE – Red LED. Flashes when the test tone is activated by theTEST TONE switch (17).

6. AUDIO AGC – Green LED. Lights when the AGC2000 option (if installed) isselected by the AUDIO AGC switch (18).

7. AUX AUDIO – Amber LED. Lights when AUX audio is selected either by theAUX AUDIO switch (19) or by switching the rear panel terminal strip CTLterminal (32) to ground.

8. SAP LEVEL – Potentiometer. Adjusts level for the SAP audio channel(when this option is installed), which is indicated on the seven-string LEDSAP AUDIO meter (4).

9. R LEVEL – Potentiometer. Adjusts level for the right audio channel, which isindicated on the seven-string LED RIGHT AUDIO meter.

10. MONITOR – Stereo 3.5 mm phono jack. Used to monitor stereo audio.11. SAP – Stereo 3.5 mm phono jack. Used to monitor SAP AUDIO (when the

SAP2000 option is installed) and AUX AUDIO.12. VIDEO LOCK – Green LED. Lights when a video lock is accomplished.13. STR & SAP – Green LED. Lights when unit is set up for stereo and SAP

operation.14. STR – Green LED. Lights when the unit is set up for stereo mode.15. MONO – Amber LED. Lights when the unit is set up for MONO operation.16. MODE – Momentary pushbutton. Selects between Mono, Stereo, and Stereo

& SAP modes.17. TEST TONE – Momentary pushbutton. Switches between an internal test

tone and normal BTSC. The test tone introduced is a 10.395 kHz, Bessel null-tone, mono signal, which affects only the L+R input. The tone is used foralignment or calibration purposes.

18. AUDIO AGC – Momentary pushbutton. Switches between standard audioand AGC-controlled audio (when the AGC2000 option is installed).

19. AUX AUDIO – Momentary pushbutton. Switches auxiliary audio input on andoff. When AUX mode is activated, the auxiliary input is fed to L, R, and SAPchannels. See also (32), below.

20. LEVEL – Potentiometer. Adjusts the AUX audio level.21. LED String – Seven-string LED display. Indicates the active functions. This

feature is installed only in later models. Some colors change for later models:(13–now–15) and (7) change to amber, and (5) changes to red. Also, MONO(13 to 15) and STR&SAP (15 to 13) indicators change positions.



DSG2000 Rear Panel22. 4.5 MHz OUT – F connector. The 4.5 MHz FM output. This connector is

nonfunctional in this unit.23. VIDEO/BTSC OUT – BNC connector. This connector is the output for either

default or BTSC VIDEO. To change to BTSC output, see Chapter 4, page 4-12.24. VIDEO IN – BNC connector. The video signal is input here.25. L + and – Screw terminals. The balanced audio input for the left channel

attaches here.26. GROUND – Screw terminals. The ground connection for the L and R chan-

nels (25 and 27).27. R + and – Screw terminals. The balanced audio input for the right channel

attaches here.28. SAP + and – Screw terminals. The SAP balanced audio input attaches here

(when the SAP option is installed).29. GROUND – Screw terminals. The ground connection for the SAP channel

input (28) (when the SAP2000 option is installed).30. AUX + and – Screw terminals. The auxiliary balanced audio input attaches

here.31. GROUND – Screw terminals. The ground connection for the auxiliary input

(30) or CTL terminal (32).32. CTL – Screw terminal. When this terminal is grounded, AUX audio input is

fed to L, R, and SAP channels. When it is open or at +5 VDC, L, R, and SAPinputs are fed to their respective channels. This function is the same as (19),above.

Installation and Operation


4 INSTALLATION AND OPERATIONINSTALLATIONRemove the TVM modulator from its shipping container and inspect it for anyphysical damage.Install the modulator into position in a 19-inch rack panel. Support the modulatorwhile installing the four front panel mounting screws.

NOTEThe unit weighs approximately 15 pounds (6.8 kilograms). It may be neces-sary to have two people handle the modulator while the front panel mount-ing screws are installed.

The nameplate on the rear of the modulator contains information concerning ACpower requirements. Make sure that the power receptacle is of the same voltagebefore plugging in the AC power cord.

There is no AC power On/Off switch. The POWER indicator on the front panel ofthe modulator will light when the power cord is plugged in. The CHANNELOUTPUT numeric light-emitting diode (LED) will display the channel numberstored in the nonvolatile read-only memory (ROM). Approximately four secondsafter power is applied, the RF OUTPUT LED will light. If the selected channelhas an assigned FCC offset frequency, the FCC OFFSET indicator will also light.

NOTEWhen installing more than one TVM modulator into an equipment rack,always leave at least one rack unit between each of them for ventilation.

INTERCONNECTIONThese modulators are designed for a headend environment. They accept separateleft- and right-channel audio (TVM450S and TVM550S or TVM550IIS), monauralaudio (TVM450, TVM550, or TVM550II), and composite video, via separate inputs.Each modulator provides both visual and aural IF outputs to external equipment forsignal processing. The processed signals then return to the modulator’s visual andaural IF input jacks.For local TV applications, each modulator receives on one TV broadcast channeland modulates on another TV broadcast channel. Baseband or IF signals canalso be used.Any TVM modulator can be used in a supertrunking environment. One modulatorinstalled at a remote antenna site drives several trunking lines.



HeadendAll TVM-series units can be configured for multiple applications in a headend in-stallation. See Figure 4-1.

1. The first configuration uses video and monaural audio signals made avail-able by the satellite receiver. The modulator then broadcasts on the TVchannel selected on the TVM450/550/550II front panel.

9018

Figure 4-1. Typical Satellite Headend Installation

2. The second configuration provides a video and BTSC stereo (baseband)signal to the modulator, using the CSG60 module in-line, to generate theBTSC stereo signal. The modulator then broadcasts on the TV channel se-lected on the TVM450/550/550II front panel.

3. The third configuration illustrates the video/stereo digital audio hookup forthe TVM550IIS with its standard-equipment DSG2000BD module.

4. The fourth configuration allows direct connection between the satellite re-ceiver and the modulator for stereo installations. This is accomplished in theTVM450S or TVM550S models, which have the CSG60 BTSC stereo gen-erator installed as standard equipment.

VIDEO – A 75 ohm baseband video signal 0.5 to 1.5 V p-p (1.0 V p-p optimum),should be inserted into the rear panel VIDEO IN connector.MONAURAL AUDIO – A balanced 600-ohm baseband audio signal, –10 to+10 dBm peak program (0 dBm optimum), should be connected to the rear panelscrew terminals. If the audio source does not have a balanced output, use thePlus and Ground screw terminals.



EXTERNAL BTSC – A baseband 600 ohm audio signal, –10 to +10 dBm peak pro-gram (0 dBm L + R optimum), can be connected to the rear panel screw terminals. Inthis configuration, the rear panel Audio switch should be set to BTSC. This settingturns off the internal pre-emphasis and recalibrates the seven-segment audio indicatorbar display for a BTSC input mode. (Note: the front panel BTSC LED will light.)

• A 4.5 MHz FM subcarrier from +30 to +60 dBmV (+35 dBmV optimum)can be inserted into the rear panel 4.5 MHz IN connection. The rear panel4.5 MHz INT/EXT switch should be in the EXT (external) position. Thisdefeats the internal 4.5 MHz signal and reroutes the 4.5 MHz subcarrierpath. (Note: the front panel BTSC LED will light.)

• A 41.25 MHz FM subcarrier, +25 dBm can be inserted at the rear panelaural IF LOOP IN. The rear panel 4.5 MHz INT/EXT switch should be inthe EXT position. This defeats the internal 4.5 MHz signal. (Note: the frontpanel BTSC LED will light.)

INTERNAL CSG60 BTSC – The TVM450S and TVM550S modulators have abuilt-in CSG60 BTSC Stereo Generator for integrated BTSC/Modulator opera-tion. At the rear panel, a Left/Right baseband audio signal, –10 to +10 dBm peakprogram (0 dBm optimum), balanced 600-ohm signal, can be inserted. This inputcan be triggered by connecting the rear panel CONT (Control) and GND(Ground) screw terminals for commercial insertion. When triggered, theLeft/Right inputs are disconnected and the Mono audio signal is bridged into theLeft/Right audio path, thus maintaining the BTSC spectrum.INTERNAL DSG2000BD – The TVM550IIS modulator has a built-in DSG2000BDdigital stereo module that provides ultraclean stereo. Similar in operation to theCSG60, this unit allows direct output of stereo signals. It can also be fitted with AGCand SAP audio.

OPERATIONRefer to Figure 3-1 for control locations.

TVM450/TVM550/TVM550IIChannel Selection1. Rotate the CHANNEL SELECT switch until the desired channel number is

displayed on the CHANNEL OUTPUT numeric display.NOTE

The RF output is muted while the CHANNEL SELECT switch is rotated,until an internal phase lock is achieved.

2. Rotating the CHANNEL SELECT switch clockwise (CW) increments thechannel number, and rotating this switch in a counterclockwise (CCW) di-rection decrements the channel number.



NOTEIf the FCC OFFSET LED is lit, confirm with a frequency counter whether theautomatic offset is correct for the system. If it is incorrect, rotate the rear panelFCC OFFSET switch to select the correct offset. Alternately, refer to Table 4-1.

Table 4-1. CATV Channels and FrequenciesNCTA

NumberFCC

ChannelNumber

VideoFreq.(MHz)

AudioFreq.(MHz)

OffsetFreq.(kHz)

2 2 55.25 59.75 03 3 61.25 65.75 04 4 67.25 71.75 05 5 77.25 81.75 06 6 83.25 87.75 07 7 175.25 179.75 08 8 181.25 185.75 09 9 187.25 191.75 0

10 10 193.25 197.75 011 11 199.25 203.75 012 12 205.25 209.75 013 13 211.25 215.75 014 A 121.25 125.75 +12.515 B 127.25 131.75 +12.516 C 133.25 137.75 +12.517 D 139.25 143.75 018 E 145.25 149.75 019 F 151.25 155.75 020 G 157.25 161.75 021 H 163.25 167.75 022 I 169.25 173.75 023 J 217.25 221.75 024 K 223.25 227.75 025 L 229.25 233.75 +12.526 M 235.25 239.75 +12.527 N 241.25 245.75 +12.528 O 247.25 251.75 +12.529 P 253.25 257.75 +12.530 Q 259.25 263.75 +12.531 R 265.25 269.75 +12.532 S 271.25 275.75 +12.533 T 277.25 281.75 +12.534 U 283.25 287.75 +12.535 V 289.25 293.75 +12.536 W 295.25 299.75 +12.537 AA 301.25 305.75 +12.538 BB 307.25 311.75 +12.539 CC 313.25 317.75 +12.540 DD 319.25 323.75 +12.541 EE 325.25 323.75 +12.542 FF 331.25 329.75 +25.0

NCTA Number

FCCChannelNumber

VideoFreq.(MHz)

AudioFreq.(MHz)

OffsetFreq.(kHz)

43 GG 337.25 341.75 +12.544 HH 343.25 347.75 +12.545 I I 349.25 353.75 +12.546 JJ 355.25 359.75 +12.547 KK 361.25 365.75 +12.548 LL 367.25 371.75 +12.549 MM 373.25 377.75 +12.550 NN 379.25 383.75 +12.551 OO 385.25 389.75 +12.552 PP 391.25 395.75 +12.553 QQ 397.25 401.75 +12.554 RR 403.25 407.75 055 SS 409.25 413.75 056 TT 415.25 419.75 057 UU 421.25 425.75 058 VV 427.25 431.75 059 WW 433.25 437.75 060 XX 439.25 443.75 061 YY 445.25 449.75 062 ZZ 451.25 455.75 063 AAA 457.25 461.75 064 BBB 463.25 467.75 065 CCC 469.25 473.75 066 DDD 475.25 479.75 067 EEE 481.25 485.75 068 FFF 487.25 491.75 069 GGG 493.25 497.75 070 HHH 499.25 503.75 071 I I I 505.25 509.75 072 JJJ 511.25 515.75 073 KKK 517.25 521.75 074 LLL 523.25 527.75 075 MMM 529.25 533.75 076 NNN 535.25 539.75 077 OOO 541.25 545.75 078 PPP 547.25 551.75 095 A-5 91.25 95.75 096 A-4 97.25 101.75 097 A-3 103.25 107.75 098 A-2 109.25 113.75 +25.099 A-1 115.25 119.75 +25.0



Audio AdjustmentThe TVM450, TVM550 and TVM550II modulators use the CMA60 MonauralAudio module. The controls and connections unique to this module are shown inFigure 4-2.

PEAK

AUDIODEVIATION INDICATOR

CMA60MONO AUDIO

MODULE AUDIODEVIATION

BTSC

+ −MONO GND

AUDIO 4.5 MHz

MONO BTSC INT EXT EXT. 4.5 MHzIN

VIDEOIN

INPUT

9037

Figure 4-2. CMA60 Front and Rear PanelsInputs to this module are Video, External 4.5 MHz Aural Carrier, and MonauralAudio. Switches available on this module are AUDIO (MONO or BTSC) and4.5 MHz (internal or external).

1. To select the Monaural Audio Input, slide the AUDIO switch to the MONOposition and apply a 0 dBm input to the IN (+) and IN (–) terminal screws onthe rear of the CMA60 Monaural Audio Module. The BTSC INPUT LEDlights when the AUDIO slide switch is moved to the BTSC position. Other-wise, this LED remains unlit.

2. The position of the 4.5 MHz switch is in either the INT (internal) or EXT (ex-ternal) position, depending on where the 4.5 MHz aural carrier is to originate.The signal applied to the EXT 4.5 MHz IN jack should be between +35 and+60 dBmV.

3. Apply a 1.0 V peak-to-peak (p-p) video signal to the VIDEO IN jack.

4. Observe the AUDIO DEVIATION LED bar display. Adjust the AUDIODEVIATION potentiometer through the PEAK marking on the face of themonaural module, so all the LEDs, except the PEAK, light. For BTSC audioinput, adjust the meter for the same indication as Monaural Audio.



Video Modulation Adjustment1. Make sure the video signal applied to the rear panel of the modulator is

1.0 V p-p. If vertical interval test signals (VITS) are not present, set the synclevel for 0.285 V p-p, or –40 IRE. Refer to Figure 4-3.

2. Look at the VIDEO OVER MOD LED to see if it is lit or just flickering on and off.

• If the LED flickers, rotate the VIDEO MODULATION adjustment CCW, tothe point where modulation just peaks and does not light the LED.

• If the VIDEO OVER MOD LED does not light at all, turn the VIDEOMODULATION adjustment CW until the LED just starts to flicker, indicat-ing modulation peaks. Then, back off the adjustment (CCW) until theflickering just ceases.

• If the VIDEO OVER MOD LED is lit continuously, rotate the VIDEOMODULATION adjustment CCW until the LED just starts to flicker. indi-cating modulation peaks. Then, further rotate the adjustment CCW untilthe flickering just ceases.

120

IREMV

800

600

400

200

110

100

90

80

70

60

50

40

30

20

10

-10

-30-200

40 20 40 80 100 120 140 160 180600

-20

-40

00

SYNC. PULSE(0.285 V P-P)

0.715 V P-P

1.0 V P-P

NOTE: IF THE VERTICAL INTERVAL TEST SIGNALS (VITS) ARE NOT PRESENT,SET SYNC. PULSE AMPLITUDE FOR 0.285 V P-P.

9022

Figure 4-3. Alignment Without VITS Present

Video/Audio Ratio Adjustment1. Connect a spectrum analyzer to the –20 dB RF TEST jack on the modulator

front panel.

2. Observe the amplitudes of the video and audio signals.

3. Rotate the VIDEO/AUDIO RATIO adjustment until a minimum of –15 dBc isachieved.



RF Level Adjustment1. Connect a spectrum analyzer to the RF OUTPUT jack located on the

modulator rear panel.

2. Rotate the RF LEVEL adjustment until the desired output level is achieved.The RF output is adjustable to +60 dBmV, but the unit should be operated at+58 to +60 dBmV for best results.

FCC Offset SwitchThe FCC OFFSET switch provides the flexibility to:

• Select the OFF position to turn the automatic offset feature off, or toremove any offset frequencies.

• Select one of four manual offset frequencies, as shown in Figure 4-4.

• Select the AUTO position (TVM450 only) to allow the read-only memory(ROM) or PROM (programmable ROM) to select the offset as pro-grammed for each channel.

9038

Figure 4-4. FCC Offset Switches

CAUTIONCare must be taken when using the FCC OFFSET switch to select a man-ual offset frequency (TVM450 only). If a channel is selected that has anFCC-assigned offset and the FCC OFFSET switch is set to any of themanual offset frequencies, the actual offset frequency is not as selected.For instance, if the FCC-assigned offset frequency in ROM is –12.5 kHzand a manual offset frequency of –12.5 kHz is selected, the resultant offsetfrequency will actually be –25 kHz.On the other hand, if the FCC-assigned offset frequency is –12.5 kHz andan offset frequency of +12.5 kHz is manually selected, the resultant offsetfrequency will be 0 kHz (or no offset). See Table 4-1 to make sure the cho-sen FCC OFFSET switch manual position is correct.A TVM550-series unit assigns only the frequency selected.



TVM450S AND TVM550STVM450S and TVM550S models incorporate, as standard, the optional CSG60BTSC Stereo Generator Module into a standard. See Chapter 5, Figure 5-7 forthe panel connections unique to these models.

INPUT LEVEL (L) Adjustment3. Make sure that the input to the L (+) and L (–) screw terminals on the rear of

the BTSC Stereo Module is a balanced 600-ohm input, with a signal amplitude of0 dBm.

4. Six LED bars will light on the LEFT CHANNEL LED bar display when the INPUTLEVEL (L) potentiometer is in the center detent position. The STEREO INPUTand VIDEO LOCK LEDs will also light.

MONO INPUT LEVEL Adjustment5. Select the MONO (+) and MONO (–) screw terminal inputs by connecting a

ground to the CONT input.

6. Make sure that a balanced 600-ohm input, with a signal amplitude of 0 dBm,is applied to the MONO (+) and MONO (–) screw terminals.

7. Six LED bars will light on the LEFT CHANNEL LED bar display when theMONO INPUT LEVEL potentiometer is in the center detent position. TheSTEREO INPUT LED will not light.

4.5 MHz OUTPUT LEVEL AdjustmentThis potentiometer should not be adjusted because the 4.5 MHz signal is internal, andthere is no way to monitor this signal externally to make an accurate adjustment.

INPUT LEVEL (R) Adjustment1. Make sure that a balanced 600-ohm input, with a signal amplitude of 0 dBm,

is supplied to the R (+) and R (–) screw terminals.

2. Six LED bars will light on the RIGHT CHANNEL LED bar display when theINPUT LEVEL (R) potentiometer is in the center detent position. TheSTEREO INPUT and VIDEO LOCK LEDs will light.

TVM450S/TVM550S Interconnection for MVP UseThese instructions are used to connect either the TVM450S or TVM550S stereo unitsto the Jerrold MVP scrambler system. (See Figure 4-5.)

1. Disconnect the power and remove all cables from the modulator.

2. Remove the modulator top cover (there are two screws on each side and onescrew on the back).

3. Disconnect jumper J503 on the P500 board.

4. Connect the jumper loosened from J503 to the 4.5 MHz OUT connector onthe unit back panel.



5. Disconnect the cable at VIDEO IN (JV01) on the PM00 board to terminatevideo.

6. Set switch S501 on the P500 board to the High position.

7. Disconnect the AURAL LOOP on the back of the unit.

8. Replace the top cover and screws and reconnect all cables removed in step 1.

Terminal Connections from TVM450S/TVM550Sto Jerrold MVPSee Figure 4-5 while reading this section.

9000A

Figure 4-5. Agile IRDII, TVM450S/TVM550S and JerroldInterconnection

1. Connect the MVP IF OUT to the TVM450S/TVM550S VISUAL IN connector.

2. Connect the MVP INTERCARRIER to the TVM450S/TVM550S 4.5 MHzOUT connector.

3. Connect the MVP VIDEO IN to the TVM450S/TVM550S VIDEO OUT con-nector.

4. Connect the TVM450S/TVM550S VIDEO IN to the receiver VIDEO OUTconnector.

5. Connect the TVM450S/TVM550S Baseband Right/Left to the receiverRIGHT/LEFT Audio terminals.

NOTEModifications to TVM550II and TVM550IIS units are needed to be able to usethe Jerrold system. Call SCC Customer Service at 1-310 532-5300 Ext. 336.



TVM550IISAll aspects of operation for the TVM550IIS are the same as the TVM450S/TVM550S,but uses the DSG2000BD module instead.

DSG2000BD ConnectionsThe DSG2000BD module accepts aural signals via separate inputs. Refer toChapter 3, Figures 3-1 and 3-3, for all numbers in parentheses.

Rear Panel1. Connect all appropriate cables between the ground connections on the rear

panel terminal strip (26), (29), and/or (31) and the equipment rack ground.

2. Insert the video signal into the VIDEO IN BNC connector on the rear panel(24).

3. Attach desired audio input cables to the + and – terminals (25), (27), (28), (30)on the rear panel terminal strips.

4. Plug in the AC cord, and press the front panel POWER switch to turn theunit on.

600 ττττ or 10 k ττττ OperationIf a change from the stock 600 τ to 10 k τ impedance operation is needed, usethe following procedure to make the changes:

1. Unplug the main power cable from the AC outlet.

2. Remove all cables from the rear panel connectors and terminals.

3. Remove the top cover by removing the two screws from each side of the unitand lifting the cover, while pulling it gently toward the rear of the unit.

4. See Figure 5-17, and locate the digital BTSC Audio Interface PC board.

5. Note that four rubber-encased jumpers are located on the rearmost terminals onjacks J1 to J4. This is the factory setting for 600 τ. See Table 4-2 for jumper con-nection relationships.

6. To change to 10 k τ operation, remove all jumpers from jacks J1 to J4, andmove them to the other terminals on the same jacks.

7. Reverse step 6 if 600 τ operation is needed.

8. Reinstall the top cover, and reconnect all cables removed in steps 1 and 2.



REAR

NOTE: FACTORYSETTING IS 600

DIGITAL BTSCAUDIO INTERFACE

PC BOARD

BLACK JUMPER

OPEN CHANGE ALL JUMPERSTO CHANGE VOLTAGE

P9 P1

P4

10 k

600

600

600

600

10 k

10 k

10 k

POWER SUPPLYPC BOARD

10042

Figure 4-6. Changing Jumpers

DSG2000 OPERATIONSet the front panel for one of the following audio processing configurations(refer to Chapter 3, Figures 3-1, 3-2, and 3-3, for numbers in parentheses).

NOTEWhen the second red LED lights, the module is overmodulating.

Stereo Audio ProcessingNOTE

In later models, individual round LEDs were replaced by rectangular onesto match the LED meters on the front panel. The reference numbers arethe same for both configurations. See Chapter 5 for accessory installation.

1. To select this mode, press the MODE push-button (16) until the STR LED(14) lights.

2. While watching the LEFT AUDIO LED string (3), adjust the L LEVEL poten-tiometer (1) until the first red LED just lights.

3. While watching the RIGHT AUDIO LED string (2), adjust the R LEVEL po-tentiometer (9) until the first red LED just lights.

Mono Audio ProcessingTo select this mode, press the MODE pushbutton (16) until the MONO LED (15)lights. Adjust as in 2, above.

SAP Audio Processing1. If this option is installed, to select this mode, press the MODE pushbutton

(16) until the STR&SAP LED (13) lights.

2. While watching the SAP AUDIO LED string (4), adjust the SAP LEVEL po-tentiometer (8) until the first red LED just lights.



Auxiliary Audio Processing1. To select this mode, press the AUX AUDIO pushbutton (19) until the AUX

AUDIO LED (7) lights.NOTE

This input may also be activated by connecting the CTL terminal (32) on themodule rear panel to ground.

2. While watching the AUDIO LED strings (2, 3, and 4), adjust the LEVEL po-tentiometer (20) until the first red LED just lights.

TEST TONEThe handy built-in test tone is for checking the aural modulation at the 4.5 MHzOUT terminal.

Checking the 4.5 MHz Aural Signal.To test the DSG2000 aural signal, press the TEST TONE pushbutton (17) until theTEST TONE LED (5) lights, and connect a spectrum analyzer to check for theBessell null point. No adjustment is possible.

External ModulatorWhen the BTSC is connected to an external modulator, the test tone is used tocalibrate the aural modulation level.

CHANGING TO BTSC OUTPUT OPERATIONThe DSG2000 module is set at the factory for video output at the VIDEO/BTSCOUT connector. To change to BTSC output:

1. Disconnect power, and remove the unit top cover.

2. There are two black-insulated wires jumped across the VIDEO/BTSC OUTand VIDEO IN connectors inside the unit. Cut them both near the middle.

3. Locate the Digital BTSC Stereo Processor PC board (the large one), andtrace the heavy cable from the VIDEO/BTSC OUT connector to where itends near this board.

4. Remove the insulation covering the TMP connector at the end of the cable.

5. Plug the TMP connector into J1 on the Stereo Processor board.

6. Make sure the wires cut in step 2 do not interfere with other components orcables (tape the ends, if necessary), and reinstall the unit top cover.

To revert to video output, reverse this procedure.

CHANGING TO COMPOSITE OUTPUTTo change to composite output at the 4.5 MHz OUT connector, jumper connec-tions on the FM PC board must be changed (see Table 4-3).



MONITORINGThe STEREO jack (10) is a 3.5 mm standard stereo jack for monitoring the quality ofthe stereo and monaural signals on the L and R inputs. The SAP jack (11) is a3.5 mm standard stereo jack for monitoring monaural SAP or auxiliary signals.

COMMENCING OPERATIONAfter all front panel settings are made, connect the cables from the 4.5 MHz F con-nector (21) and VIDEO OUT BNC connector (VIDEO/BTSC) to the designated combineror distribution system point.

DSG2000 USER-ACCESSIBLE JUMPERSTables 4-2, 4-3, and 4-4 show the internal shunt or jumper positions the user canchange to suit the operating conditions. See Chapter 5, Figures 5-16 and 5-17for most jumper locations.

Table 4-2. Audio Board Jumper FunctionsJJuummppeerr PPoossiittiioonn DDeessccrriippttiioonn ooff FFuunnccttiioonn

11 && 22 IInn 660000 OOhhmm IImmppeeddaannccee LL IInnppuutt ((DDeeffaauulltt))PP11 33 && 44 IInn 1100 kk OOhhmm IImmppeeddaannccee LL IInnppuutt

11 && 22 IInn 660000 OOhhmm IImmppeeddaannccee RR IInnppuutt ((DDeeffaauulltt))PP22 33 && 44 IInn 1100 kk OOhhmm IImmppeeddaannccee RR IInnppuutt

11 && 22 IInn 660000 OOhhmm IImmppeeddaannccee SSAAPP IInnppuutt ((DDeeffaauulltt))PP33 33 && 44 IInn 1100 kk OOhhmm IImmppeeddaannccee SSAAPP IInnppuutt

11 && 22 IInn 660000 OOhhmm IImmppeeddaannccee AAUUXX IInnppuutt ((DDeeffaauulltt))PP44 33 && 44 IInn 1100 kk OOhhmm IImmppeeddaannccee AAUUXX IInnppuutt

PP1144 11 && 22,, 33 && 44,, 55 && 66,, 77 && 88,, 99 && 1100RReemmoovvee jjuummppeerrss ttoo iinnssttaallll AAGGCC22000000 ooppttiioonn;;JJuummppeerrss iinnssttaalllleedd wwhheenn nnoo AAGGCC22000000 ooppttiioonn

Table 4-3. FM Board Jumper FunctionsJJuummppeerr PPoossiittiioonn DDeessccrriippttiioonn ooff FFuunnccttiioonn

11 && 22 IInn VVIIDDEEOO IINN SSuummmmeedd wwiitthh 44..55 MMHHzz OOUUTTPP33 22 && 33 IInn VVIIDDEEOO IINN nnoott SSuummmmeedd wwiitthh 44..55 MMHHzz OOUUTT ((DDeeffaauulltt))

Table 4-4. Stereo Processor Board Jumper FunctionsJJuummppeerr PPoossiittiioonn DDeessccrriippttiioonn ooff FFuunnccttiioonn

11 && 22 IInn VVIIDDEEOO IInnppuutt 7755 oohhmm tteerrmmiinnaattiioonnPP88 11 && 22 OOuutt VVIIDDEEOO IInnppuutt NNoo TTeerrmmiinnaattiioonn ((DDeeffaauulltt))

33 && 44 IInn VVIIDDEEOO SSAAPP OOppttiioonn IInnssttaalllleeddPP99 33 && 44 OOuutt VVIIDDEEOO SSAAPP OOppttiioonn NNoott IInnssttaalllleedd((DDeeffaauulltt))

Option Installation


5 OPTION INSTALLATIONCBP45The CBP45 is a high-quality 6 MHz surface acoustic wave (SAW) filter option foruse with some IF scramblers. When installed on the IF input loop to correct in-herent scrambling-process noise, the CBP45 eliminates adjacent channel inter-ference that the scrambling causes. (Also see CBP45-1 Option, below.)

The CBP45 PC board mounts vertically between the rear panel and the RFblock. The component side of the PC board mounts facing the rear panel, withthe solder side toward the up/down converter (see Figure 5-1).

8007

Figure 5-1. CBP45 Wiring and PC Board LocationsCBP45 Installation Procedure

NOTEThe CBP45 option package (see Figure 5-2 for contents) and the CBP45-1option package (see Figure 5-3 for contents) contain connectors and wiringto install an external composite IF loop. Parts in the CBP45-1 kit includethose in the CIF450-1 option, which is described later in this chapter. Not allparts in the CBP45-1 package will be installed.

CAUTIONBecause of the nearness of the other devices, make all cable connections beforeinstalling the CBP45 PC board.

Option Installation


1. Verify that the CBP45 package contains the parts shown in Figure 5-2.

9681

Figure 5-2. CBP45 Option Package Contents

2. Remove the modulator power cord from the wall socket, and disconnect allrear panel cables.

3. To remove the modulator top cover:

a. Remove the front mounting brackets.b. Remove the screws from the side panel, toward the rear of the unit.c. Remove the cover screw from the rear panel.d. Remove the top cover.

4. Disconnect the coaxial cable from J303 on the IF combiner PC board (seeFigure 5-1). It may be necessary to remove the combiner board to get to theconnector. Move the disconnected end out of the way temporarily. Note that the7-inch RCA-to-TMP cable in the CBP45 package is a spare for this cable.

5. Connect one end of the supplied 7-inch TMP-to-TMP coaxial cable to J303on the IF combiner board. Connect the other end to JH51 on the CBP45board.

6. Locate the supplied 2-pin connector with the red and brown wires attached.a. Solder the red wire to jumper U9 on TVM PC board P800.b. Solder the brown wire to jumper U8 on the same board.c. Insert the 2-pin connector into socket JH53 on the CBP45 PC board.

7. Connect the RCA cable end disconnected in step 4 (or the 7-inch RCA-to-TMP from the package) to JH52 on the CBP45 board.

8. Remove the two screws anchoring the rear of the up/down converter to thechassis.

9. Align the CBP45 mounting holes (component side toward the rear panel) withthe up/down converter board mounting holes and reinstall the screws removedin step 8.

10. Reinstall the modulator top cover.11. Reconnect all cables removed in step 1.

Option Installation


CBP45-11. Verify that the CBP45-1 package contains the parts shown in Figure 5-3.

9680

Figure 5-3. CBP45-1 Package Contents

2. Remove the modulator power cord from the wall socket, and disconnect allrear panel cables.

3. To remove the modulator top cover:


4. Remove the black paper tape covering two openings in the rear panel to theleft of the VISUAL IF IN and AURAL IF IN connectors, as seen in Figure 5-4.

9395

Figure 5-4. Connector Sites5. Install the F-to-solder terminal connector in the lower hole, with the ground

terminal beneath the securing nut and washer. The F connector faces out-ward.

6. Locate the supplied 7-inch RCA-to-TMP cable.

Option Installation


7. See Figure 5-5, and cut the RCA connector off as near the connector aspossible, and discard the connector.

9397

Figure 5-5. Preparing and Installing the Cable8. Slit the exposed shield its full length, less a half-inch or so, and twist it so it

forms a single bundle.9. Cut away about 3/8-inch of insulation covering the inner wire.10. Securely solder the exposed wire to the center conductor of the F-to-solder

terminal connector as shown, and the shield bundle to the ground terminal.11. Install the F-to-RCA connector in the upper hole, with the F connector facing

outward.12. Locate the supplied 2-pin connector with the red and brown wires attached.

a. Solder the red wire to jumper U9 on TVM PC board P800.

b. Solder the brown wire to jumper U8 on the same board.

c. Insert the 2-pin connector into socket JH53 on the CBP45 PC board.13. As shown in Figure 5-6, connect one end of the 7-inch TMP-to-TMP cable to JH51 on

the CBP45 PC board.

Option Installation


9396

Figure 5-6. CBP45-1 Installation14. Connect the other end of the cable to the IF Combiner PC board.15. Remove the two screws anchoring the rear-facing half of the up/down con-

verter to the chassis.16. Align the CBP45 PC board mounting bracket holes with the up/down converter

board bracket holes and reinstall the screws removed in step 15.17. Reinstall the modulator top cover.18. Affix the COMP IF label to the unit rear panel, as shown in Figure 5-4.19. Reconnect all cables removed in step 1.

Option Installation


CSG60See Figure 5-7 for panel controls and connections.

9036

Figure 5-7. CSG60 Front and Rear Panels

CSG60 Installation1. Verify that the CSG60 package contains:

• One rear panel, complete with terminal strip, a terminal/connector mountingstrip, a long cable (connected to the VIDEO IN connector), and a short cablefor connecting the center pins of the VIDEO IN and the VIDEO OUT jacks;

• One front panel plate, with interface board and attached cables;• One P500 PC board and attached cables;• One 75-ohm coaxial cable;• One 3-wire cable.

2. Remove the power cord from the modulator and disconnect all exterior cables.3. To remove the modulator top cover:


4. Remove the plate from the front panel of the unit labeled CMA60 monauralaudio module.

5. Remove the board behind the plate and the two cables (one 3-wire and one4-wire) plugged into it, leading to the rear of the unit.

6. Remove the plate located on the rear panel and unplug the 5-wire cable andthe two coaxial cables from the PC board.

NOTESave the rear plate and screws (these will be used later) and all PC boardsremoved during this procedure.

Option Installation


CSG60 Inside Operations1. On the PK00 board located next to the heat sink inside the TVM450 or

TVM550. Follow the 3-wire cable (brown-gray-gray) to the power supplyboard and disconnect it there.

2. Unplug the coaxial cable connected to JM02 on the PK00 board.3. Remove the PK00 board.

Installing the PC Boards1. Install the P500 board in the spot where the PK00 board was removed ear-

lier. Orient the board so the side with crystal X501 faces the rear panel.2. Remove the screws from their posts on the right side of the unit (looking at the front panel) and

install the double-decked PK00 board as seen in Figure 5-8. Orient the board so theblack inductors along its short edge are closest to the heat sink. SCC’s DBX®

board is the upper board, and its line of blue potentiometers are on the left-hand side. Thefour white connectors should be closest to the right edge of the unit.

9030

Figure 5-8. CSG60 Cable Routing

Option Installation


3. Install the new PK00 board in its spot inside the front panel.NOTE

The remaining board and the board removed earlier are both named PK00.The new one is a double-decked chassis board, and is the only one that willfit into the space provided.

4. Install the front panel plate to cover the PK00 board.5. Reattach all cables removed in step 2 under CSG60 Installation.

Cable ModificationThis section is for units with SN 03Uxxxxxx or earlier.1. On the P500 board, the W501 cable is too short to reach the PK00 board

and JK02. This cable must be lengthened by five inches, using the samecolor and gauge wire. After lengthening it, use shrink wrap tubing to coverthe exposed areas of the wire.

2. On the rear plate terminal block, the GND and CONT cables need to belengthened by three inches. Use the same gauge and color wire, and useshrink wrap tubing to cover the exposed splice areas. Then, plug this as-sembly into the PK00 board at JK03.

Connector ModificationOn the CMA60, unsolder the longest coaxial cable from its connector and resol-der it to the VIDEO OUT connector on the CSG60. Electrically, the VIDEO IN andVIDEO OUT jacks will be parallel. A wire connecting the center pins of the twojacks should now be seen. If there is no grounding tab on the VIDEO OUT con-nector, solder the wire directly to the VIDEO IN connector.

InterconnectionsRefer to Table 5-1 when making connections between PC boards.Performance of the unit depends on it. See Figure 5-8. When tie-wrapping thecables, leave some slack to those cables that have RF connectors—they caneasily be pulled out of their sockets.

CSG60 Installation Notes1. The 4.5 MHz connector on the rear panel plate is used only under certain

conditions and is not operative.2. When tie-wrapping, it is important to keep the wires and cables that go from

the microprocessor board to the RF block SEPARATED from the CSG60cables.

Option Installation


Table 5-1. CSG60 Option PC Board ConnectionsFrom To

Description Board Location Board Location2-Wire Plug Rear Plate GND/CONT PK00 JK036-Wire Plug Rear Plate L/R/MONO PK00 JK01Coaxial Cable (MCP) Rear Plate VIDEO IN P500 J501Coaxial Cable (MCP) Rear Plate VIDEO OUT PK00 JV01Coaxial Cable P500 J502 PK00 JK04Coaxial Cable P500 J503 P500 JB022-Wire Plug PX00 JX07 PK00 J5042-Wire Plug PX00 JX02 PK00 W5023-Wire Plug PX00 JX06 PK00 WK013-Wire Plug PX00 JX03 PK00 WK043-Wire Plug PX00 J551 PK00 WK023-Wire Plug PX00 JX05 PK00 WK092-Wire Plug PX00 JX01 PK00 WK103-Wire Plug PX00 JX04 PK00 WK035-Wire Plug P500 W851 P800 J8163-Wire Plug P500 W501 PK00 JK024-Wire Plug P500 W852 PK00 J851

Option Installation


CIF450-1The CIF450-1 option allows the insertion of an external COMPOSITE IF signal.CIF450-1 Package Contents (see Figure 5-9).

• One F-to-RCA connector (P/N YJ10003060)• One F-to-solder terminal connector (P/N YJ10002260)• One TMP-to-solder terminal Cable (P/N SA0425003A)• One coaxial cable, RCA–RCA (P/N SA0425002A)• One F connector-to-F connector cable (P/N• One COMPOSITE IF IN/OUT Label (P/N S09521001A)• One Terminal, earth lug (P/N 236C129020)

9679

Figure 5-9. CIF450-1 Option Package Contents

CIF450-1 Installation1. Remove the modulator power cord from the wall socket, and disconnect all

exterior cables.2. Remove the modulator top cover.

a. Remove the front mounting brackets.b. Remove the screws from the side panel, toward the rear of the unit.c. Remove the cover screw from the rear panel.

3. Remove the paper tape covering two openings in the rear panel to the rightof the covered REMOTE CONTROL opening, as seen in Figure 5-4.

4. Install the F-to-lug connector in the lower hole, with the ground terminal be-neath the securing nut and washer.

5. Locate the 7-inch RCA-to-solder terminal cable.6. Solder the center conductor of the stripped and tinned end to the center ter-

minal of the connector installed in step 4, and the shield bundle to theground lug.

7. See Figure 5-1, and connect the RCA end of the cable to J303 on the IF combi-ner PC board.

Option Installation


8. Install the F-to-RCA connector from the package in the upper hole, with theF connector facing outward.

9. Disconnect the RCA-to-RCA cable from J201 to the IF combiner board at thecombiner board.

10. Connect the RCA–RCA cable from connector J101 on the up/down con-verter to the top F connector as shown. (Use the supplied RG-59 A/U cableto jumper the new IF connectors when this option is not being used.)

11. Reinstall the modulator top cover.12. Reconnect all cables removed in step 1.

CSG60 OR CMA60BOARD

EXISTINGJACKS

EXISTINGRCA-TO -RCA

CABLE

F-TO-TMPCABLE

(MODIFIED)

IF COMBINERBOARD

NEWCONNECTORS

OUTPUT AMPMODULE

RF TUNER/MIXER(UP/DOWN CONVERTER

MODULE)

POWER SUPPLYBOARD(P800)

J101

9020

Figure 5-10. CIF450-1 Installation

Option Installation


CALT45The CALT45 is an optional, vertically mounted PC board that provides anALTERNATE COMP (composite) IF IN input to the TVM-series modulators, exceptwhen the CIF450-1 option is installed. The CALT45 module is designed primarily togive users the option of quickly switching to an alternate receiver/modulator combina-tion on numerous channels for civil defense or other time-critical reasons.Switching to ALTERNATE COMP IF occurs either automatically or manually.Automatic switching occurs when the ALTERNATE COMP IF input level reaches30 dBmV ± 3 dB. Manual switching occurs when the REMOTE IF SELECTswitch closes to ground, regardless of level.

CALT45 Installation NotesThe CALT45 board mounts vertically in the TVM-series modulators between theunit rear panel and the up/down RF converter module. Because of the proximityof other boards, complete the cable connections before installing the board.Make sure the component side of the CALT45 board faces the unit rear panel.

NOTEThe CALT45 has a built-in CBP45. The CALT45 is not compatible withTVM-series modulators containing a CIF450 composite loop kit or a CBP45or CBP45-1 filter module and loop connectors.

Later TVM450 and TVM550-series units have both an auxiliary IF opening and aremote control opening in the rear panel. Earlier TVM450 units do not have theauxiliary IF opening. If a TVM450 does not have an auxiliary IF opening in therear panel, drill a standard F-type connector hole (7/16-inch) one inch directly tothe right of the REMOTE IF SELECT hole (between the REMOTE IF SELECThole and the VISUAL IF IN hole).Test points TP02/TP03 on the CALT45 board may have to be unsoldered tomatch the attenuation of the TVM IF combiner board.

CALT45 Parts Needed• 1 TVM450- or TVM550-series modulator• 1 CALT45 option kit

CALT45 Installation1. Verify that the CALT45 option kit contains the parts shown in Figure 5-11.

Option Installation


7075

Figure 5-11. CALT45 Option Package Contents2. Disconnect the power cord, and remove all cables from the unit rear panel

connectors.3. To remove the unit top cover.

a. Remove the unit front handles.

b. Remove the screws from the side panel, toward the rear of the unit.

c. Remove the cover screw from the rear panel.

d. Remove the top cover.

4. Measure IF combiner board R302 resistance:

a. Locate and remove the IF combiner PC board from theTVM450/TVM550 rear panel (see Figure 5-12).

b. Remove the coaxial cable connected to J303 on the IF combiner board.Set the cable aside for later use in installing the CALT45 PC board.

c. On the IF combiner PC board, measure the resistance of resistorR302 (see Figure 5-13).

d. Find the measured resistance in Table 5-2. Remove solder, when in-structed, from test points TP02/TP03 on the CALT45 board (PN01) tomatch the attenuation shown in the table. See Figure 5-12 for test pointlocations.

Option Installation


7076

Figure 5-12. CALT45 Installation

J302

R302

J303

VISUAL IF IN

AURAL IF IN J301 MEASURERESISTANCE

7079

Figure 5-13. IF Combiner PC Board Component Locations5. Reinstall the IF combiner PC board :

a. Connect one end of the supplied seven-inch TMP-to-TMP coaxial cableto location J303 on the IF combiner board.

b. Reinstall the IF combiner board in the unit rear panel.c. Connect the other end of the coaxial cable to JN01 on the CALT45

board.

Option Installation


Table 5-2. RF Combiner PC Board R302 ResistanceR302

ResistanceAttenuation CALT45 Test

Point TP02CALT45 TestPoint TP03

200 ohms –15 dB OFF (open, remove solder) OFF (open, remove solder)120 ohms –12 dB ON (closed, do not remove

solder)OFF (open, remove solder)

100 ohms –11 dB ON (closed, do not removesolder)

ON (closed, do not removesolder)

NOTEThese test points act as jumpers. To “open” the connection, remove the pre-existing solder from the test point. To “close” the connection, do not remove thesolder.

6. Assemble the REMOTE IF SELECT parts into the unit rear panel as shownin Figure 5-14 (see Figures 5-12 and 5-15 for placement).

7. Install the supplied F-to-RCA connector in the TVM rear panel (ALTERNATEIF COMP IN). See Figures 5-12 and 5-15 for placement. (Here is where ahole may have to be drilled on an early TVM450.)

a. Remove the paper cover from the REMOTE IF SELECT hole in the rearpanel.

b. Insert the F-to-RCA connector into the hole, with the F connector on theoutside of the rear panel and the RCA connector on the inside of therear panel (see Figure 5-15).

c. Using the two provided nuts, tighten the connector securely. Make sureto install the solder-lug ground connector between them as shown.

8. In the CALT45 kit, locate the 3-pin connector with blue, red, and brownwires.

a. See Figure 5-12, and solder the blue wire to location U10 on the P800power supply PC board.

b. Solder the red wire to location U8 on board P800.c. Solder the brown wire to location U9 on board P800.d. Insert the 3-pin connector into socket JN04 on the CALT45 board.

Option Installation


SCREW WITHATTACHED WASHER

REMOTE IFSWITCH PLATE

BLACK "HAT"RETAINER

BLACKCOLLAR

METAL WASHER

NUT

SOLDERLUG

REAR PANEL

7073

Figure 5-14. Remote IF Select Installation9. Using the coaxial cable removed in step 4-b, connect JN05 on the CALT45

board to the up/down RF converter module (see Figure 4-15).10. Insert the 2-pin connector with the single brown wire into socket JN03 on the

CALT45 board (see Figure 4-15).11. Using the supplied four-inch RCA-to-TMP coaxial cable, connect JN02 on

the CALT45 board to the ALTERNATE IF COMP IN RCA jack installed instep 7 (see Figure 4-15).

PART NO. TVM450

REMOTEIF SELECT

ALTERNATECOMP. IF IN

VISUAL IF45.75MHz

COMP IF

IN

IN

OUT

OUT

AURAL IF41.25MHzRF

OUTPUT

VIDEOIN

120V AC 50/60MZ 40WJAPAN

SER. NO.

LABEL

7078

Figure 5-15. REMOTE IF SELECT and ALTERNATE COMP IF INRear Panel Locations

12. Remove the two screws from the up/down RF converter module mountingrails near the TVM450/TVM550 rear panel (see Figure 5-12).

13. Using these screws, install the CALT45 board, with the component side fac-ing the TVM450/TVM550 rear panel.

14. Replace the TVM450/TVM550 top cover.15. Replace all cables removed in step 2, and connect the power cord.16. Affix the two labels provided in the CALT45 package, as shown in Figure 5-15.

Option Installation


CALT45 Application NotesA minimum signal level of 38 dBmV is required at the ALTERNATE COMP IF INport to produce a proper level (60 dBmV) at the modulator’s primary RF output.However, 38 dBmV is well above the threshold level (30 dBmV ± 3 dB) for switchingto the alternate modulator. Therefore, during setup, the most technically soundmethod to switch to the alternate modulator is to set the modulator to produce38 dBmV at the ALTERNATE COMP IF IN port first. Then, turn off the backupmodulator. To switch to the alternate modulator, power the unit up.The REMOTE IF SELECT switch can be used to manually switch toALTERNATE COMP IF IN input for manual control systems. However, the Automode must be disabled by grounding the REMOTE IF SELECT.

CALT45 Installation Verification Procedure1. Connect the IF output from another modulator to the ALTERNATE COMP IF

input.2. Verify that the TVM450/TVM550 automatically switches to the alternate IF

when the level reaches 30 dBmV ± 3 dB.

3. Verify that the TVM450/TVM550 manually switches to the alternate IF as theREMOTE IF SELECT is grounded, regardless of input level.

4. Verify that the TVM450/TVM550 RF output generates 60 dBmV when auto-matically or manually switching to the alternate IF.

Option Installation


SAP AUDIO (TVM550IIS)SAP Audio Parts Needed

1 SAP2000 Option Package1 SAP PC Board1 Ribbon Cable1 Jumper4 .. Screws

SAP Audio Installation Procedure1. Remove the top cover of the unit containing the DSG2000 option package.2. Locate the DSG2000 Stereo PC board (see Figure 5-16).3. Position the SAP2000 PC board above the DSG2000 stereo PC board so

jack J6 on the SAP2000 PC board is as shown in the figure.4. Connect the flat ribbon cable from jack P6 on the SAP2000 PC board to jack

P6 on the DSG2000 stereo board.5. Install the SAP2000 PC board on the four existing standoffs, and secure it

with the four screws.6. Install the supplied jumper over pins 3 and 4 on jack P9 on the DSG2000

stereo PC board as shown.7. Replace the unit top cover.

Option Installation


10084

Figure 5-16. DSG2000/SAP2000 Component Locations

SAP Audio Activation1. To activate the SAP mode, press the MODE push-button on the DSG2000

front panel until the STR&SAP LED lights.2. While watching the SAP AUDIO LED string, adjust the SAP LEVEL potenti-

ometer until the first red LED just lights.

Option Installation


AGC (TVM550IIS)AGC OperationThe AGC can process a Left and Right stereo pair, plus two independent audiochannels (SAP and AUX). Each of the four channels enters at a rear panel con-nector and is buffered before the AGC subassembly. When the AGC is OFF, theaudio signals bypass the AGC subassembly, and the normal front-panel audioadjustments are functional. See Table 5-3 for the relationship of peak input tomodulation and peak output of a reference receiver.

Table 5-3. AGC in OFF ModeRear PanelInput Level dBm

(Peak)Potentiometer

AdjustmentOutput Level dBm

(Peak)Aural

Modulation+10 Fully CCW 0 100%

0 Center 0 100%–10 Fully CW 0 100%

Configuring the AGC2000Before installation, review the setting of the Unity Gain jumper (P7) by comparingthe program material and input levels to be expected Table 5-4. The factory de-fault setting will most likely provide satisfactory operation and should be used if indoubt. The jumper has four positions that indicate an average audio level overtime (see Figure 5-17). Users may move the jumper to give lower average audiolevels for coordination with other channels in the system. However, users cannotmove the jumper to give higher audio level if the amplitude excursions exceedthe limiting value. As a rule of thumb, signals with minimal excursions in dynamiclevel may benefit from the –6 dB setting, assuming the average level is accept-able, while signals with extreme excursions within the program material maybenefit from the –15 setting to prevent limiting.

Table 5-4 Steady-State Output vs. InputRear PanelInput Level(rms) dBm

PotentiometerAdjustment

Jumper –6Output Level

(dBm)


(dBm)


(dBm)


(dBm)> +18 Level exceeds input buffer range+18 n/a –2.25 –4.5 –6.75+14 n/a Limiting –3.25 –5.5 –7.75+10 n/a –2 –4.25 –6.5 –8.75+8 n/a –2.5 –4.75 –7 –9.25+4 n/a –3.5 –5.75 –8 –10.250 n/a –4.5 –6.75 –9 –11.25–6 n/a –6 –8.25 –10.5 –12.75–9 n/a –6.75 –9 –11.25 –13.5–12 n/a –7.5 –9.75 –12 –14.25–15 n/a –8.25 –10.5 –12.75 –15–20 n/a –9.5 –11.75 –14 –16.25–40 n/a –14.5 –16.75 –19 –21.25–60 n/a –19.5 –21.75 –24 –26.25

Option Installation


Principles of OperationWith the AGC switch OFF, the AGC2000 has no effect on signal levels, and ad-justments may be made manually with the front panel controls. When ON, thegain of the four signals (LEFT, RIGHT, SAP, and AUX) are automatically con-trolled. Left and Right signal power levels are sensed with a true RMS sensorand summed. The average is applied to gain-control amplifiers for the stereopair. The two additional channels are monitored with true RMS sensing, with in-dependent gain control applied to separate gain-control amplifiers. RMS powersensing is performed throughout, because RMS sensing more closely conformsto the human ear mechanisms that either peak or average deviation sensing.The power input is compared to the reference level determined by the Unity Gainjumper (P7). Input signals above that level are reduced in amplitude (over time)while signals below that level are increased in amplitude (over time) in a ratio of4:1 input to output. (See Table 5-4.) For example, if the reference level is set to–12 dB, an input signal of –2 dB will be 10 dB above the reference level. TheAGC reduces this difference to one fourth of that value, or 2.5 dB. The output willbe –9.5 dB, or 2.5 dB above the reference value.The system has a ‘quiet’ detector that freezes gain changes and holds for 30to 60 minutes when the level drops sharply, i.e., more than 18 dB. This preventsgain increases from outputting background noise when no signal is present.To prevent overmodulation, the unit includes a limiter circuit with extremely fasttime constants. It aggressively slows the gain increase in a smooth manner toprevent distortion byproducts. The last 2 dB of output (0 to –2 dB) are reservedfor the limiting process. Hard clipping can occur only when input buffers areoverdriven (above +18 dBm).The gain adjustments contain specific lag times to provide the listener with anadded perception of wide dynamic range. Sudden loud passages are reduced ingain in a short but not instantaneous time that leaves the sensation of extremeloudness without overdriving the system. Softer passages are increased in gainover a longer period to provide consistent output levels without noticeable fluc-tuations in quiet passages. Gain control without these limiting and gain lag timecharacteristics may sound harsh, flat or overly compressed.Users need to select a unity gain point that allows headroom for their maximumRMS power excursions. The default setting of –12 dB tends to force the averageaudio level to this reference level, and is most likely to be the correct setting un-der almost all conditions.In normal operation, the LEDs should never show modulation over 100% be-cause of the soft clipping. If the LED bar graph shows consistently low levels thatare never limited, consider increasing the reference level setting to increase av-erage power level to the Stereo Generator to improve signal-to-noise and bal-ance levels between the modulated channel and others in the system.

Option Installation


SpecificationsInput Level: +18 dBm maximum to prevent hard clipping

Approaches 0 dBm (100% modulation)Output Level

Limits at –2 dBm to 0 dBmLevel Freeze Trigger –18 dBm decrease at input; hold for 0.5 hr

High to Low: 10 sec (approx.)Response Time

Low to High: 1 sec (approx.)Level Sensing True RMS power detection.

AGC Option InstallationAGC Option Parts Needed

• 1 AGC2000 Option Package• 1 AGC2000 PC Board Assembly• 3 Plastic Standoffs• 1 Instruction Sheet

CAUTIONAlways use antistatic protection when installing the AGC PC board assem-bly. Contact with foreign substances may cause damage to components.

1. Prior to this installation, make sure the DSG2000B digital stereo generatoroption has been installed properly and is operating.

2. Disconnect power, and remove all cables attached to the rear panel.3. Remove the top cover of a unit that contains at least one DSG2000 digital

stereo module.a. Remove the front mounting handles.b. Remove the screws from the side panel toward the rear of the unit.c. Remove the cover screw from the rear panel.

4. See Figure 5-17, and remove all jumpers from P14 on the audio PC boardassembly in the chassis.

5. Insert the three standoffs, as shown, into the audio PC board assembly.6. Carefully line up the three connectors on the solder side of the AGC PC

board assembly with the pins on the corresponding connectors on the audioPC board assembly. Also make sure that the standoffs line up with the holesin the audio PC board assembly, and press the AGC PC board assemblyinto place on the top of the standoffs.

Option Installation


10201

Figure 5-17. Installing the AGC PC Board7. Move the jumper at P7 on the audio PC board assembly to the desired posi-

tion. See Table 5-5 for output level recommendations.

Table 5-5. Output HeadroomInput Dynamic Range Application, Based on Maximum Excursion

–6 dB Highly Compressed (Off-Air Broadcasts)–9 dB Slightly Higher-Range Audio (Talk Shows, etc.)–12 dB Midrange Audio (Typical Satellite Feed) (Factory Default

Setting)–15 dB Premium Movie Channels with High-Range Audio, Action

Features, etc.

8. Reinstall the unit top cover, reversing step 2.9. Reconnect all cables disconnected in step 1.

AGC ActivationTo activate the AGC mode, press the recessed AGC pushbutton on theDSG2000 front panel until the red AGC LED lights.

TVM450/S/TVM550/S/TVM550II/TVM550IIS Owner’s Manual

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TVM450 Block Diagram

Owner’s Manual TVM450/S/TVM550/S/TVM550II/TVM550IIS

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TVM550/TVM550II Block Diagram

TVM450/S/TVM550/S/TVM550II/TVM550IIS Owner’s Manual

9029S

TVM450S/TVM550S Block Diagram

Owner’s Manual TVM450/S/TVM550/S/TVM550II/TVM550IIS

9032II

TVM550IIS Block Diagram

Standard Communications Corp.

Satellite & Broadband Products Division Limited Warranty

Standard Communications Corp. (SCC) warrants, to the original purchaser (the "Purchaser")only, that each new Satellite & Broadband product will be free from defects in materials andworkmanship under conditions of normal use and service for a period of one (1) year from thedate of delivery to the Purchaser. SCC's liability under this warranty shall be limited to repair orreplacement of the defective product, at SCC's option, and under no circumstances shall SCCbe liable for consequential, incidental or other damages arising out of or in any way connectedwith a failure of the product to perform as set forth herein.

THIS LIMITED WARRANTY EXTENDS ONLY TO THE PURCHASER AND IS IN LIEU OF ALLOTHER EXPRESS OR IMPLIED WARRANTIES, INCLUDING THOSE OFMERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

In the event of a defect, malfunction, or failure of the product to conform to specifications duringthe one-year warranty period, SCC will repair or replace, at its option and without charge to thePurchaser, the product which upon examination by SCC shall appear to be defective or not upto factory specifications. SCC will pay all labor charges incurred in providing such warrantyservice. To obtain warranty service, the Purchaser must first obtain a repair order (R.O.)number from SCC. The defective product must then be returned to SCC freight prepaid. SCCwill examine the product and respond to the Purchaser in approximately four (4) weeks from thedate of receipt of the product claimed to be defective.

This limited warranty does not extend to any product which has been subjected to misuse,neglect, accident, improper installation, or subject to use in violation of the maintenance oroperating instructions, if any, furnished by SCC; nor does this warranty extend to products onwhich the serial number has been removed, defaced, or changed.

SCC reserves the right to make changes or improvements to its products during subsequentproduction, without incurring the obligation to install such changes or improvements onpreviously manufactured or sold products.

This warranty gives you specified legal rights that vary from state to state. Because somestates do not allow limitations on the duration of the warranty, or exclusions or limitations ofincidental or consequential damages, these limitations or exclusions may not apply to you.

GOLD STANDARD SUPPORT PROGRAMThe Gold Standard Support Program is designed to provide domestic users of our commercial systems thebest possible support and service available. Here is how the program works:

SEVEN-YEAR GUARANTEE

In the event of technical problems requiring SCC-factory repair during the first 12 months from purchase date,SCC will warrant the cost, including parts and labor, as specified in SCC's Satellite & Broadband ProductsDivision Limited Warranty policy. During the next six years following expiration of the original warranty, themaximum service charge will be $150.00, and recertification of all PSR-series receivers will be an additional$150.00. Whenever possible, SCC will attempt to upgrade performance to the latest improved specification,while remaining below the maximum service charge. Qualifying merchandise must be assigned an SAR(Satellite & Broadband Advance Repair) number by SCC's Customer Service administrator. The equipmentthen can be shipped to SCC, freight prepaid. SCC will return the equipment, freight prepaid, via FedExStandard Air, unless otherwise specified, at the customer's expense. Repair charges will be applied at theout-of-warranty rate in the event of physical or electrical abuse to in-warranty equipment.

LIFETIME LOANER PROGRAM

This program has been established to minimize downtime resulting from SCC equipment failure in criticalservice situations. The program is provided FREE (excluding freight) for the life of qualifyingSCC-manufactured equipment. In the event that any SCC-manufactured equipment covered under the loanerprogram fails during normal operation, SCC will provide a compatible SCC loaner unit to the customer tosustain present operations for the duration of time it takes SCC to repair and return the customer's unit. Toqualify for this program, the customer must have a current open-terms account in good standing with SCC, andprovide a purchase order for the estimated freight costs. A special 24-hour shipping program has beenarranged with FedEx.* All shipping arrangements are taken care of by the SCC Customer ServiceAdministrator. The customer will receive a package consisting of: (a) a special shipping case; (b)SCC-specified loaner equipment; and (c) shipping and agreement documents.

A purchase order number must be provided for the estimated shipping costs before the loaner equipment isdelivered (customer pays shipping). The customer must return the defective equipment to SCC, freightprepaid, in the supplied shipping case, within 48 hours of receiving the loaner equipment. SCC will return therepaired equipment freight prepaid. The customer must then return the loaner equipment to SCC, freightprepaid, in the supplied shipping case within 72 hours of receiving the repaired equipment. If the loanerequipment is not shipped within 72 hours, a daily rental fee, not to exceed five percent of the net cost of theequipment, will be charged to the customer's account until SCC's loaner equipment is returned. Please callthe Satellite & Broadband Products Division's Customer Service Administrator at Extension 316 for additionalinformation on qualifying equipment and procedures.

CLAIMS

Claims for shortages, erroneous charges, or price corrections must be presented within 30 days of invoicedate. Freight damage claims should be filed directly with the delivering carrier within seven days.

NEW and UNOPENED EQUIPMENT may be returned for credit with prior approval from SCC within 30 days ofinvoice date. A 20 percent processing and handling charge will be assessed on any new items returned forcredit. Please call the Satellite & Broadband Products Division's Sales Administrator for further information.

NOTE: SCC will do its best to ship a complete unit within 24 hours. In the event of power failure, natural disaster, or any othercircumstance beyond SCC's or FedEx's control, the Lifetime Loaner Program could be discontinued. The Gold Standard SupportProgram is subject to change or modification without notice.

INTERNATIONALGOLD STANDARD SUPPORT PROGRAM

This Gold Standard Support Program is designed to give international user of our commercial systems thebest possible support and service available. Here is how the program works:

•••• WARRANTY AND SERVICE PROGRAM

In the event of technical problems requiring SCC factory repair during the first 12 months from purchasedate, SCC will warrant the cost, including parts and labor, as specified in SCC’s Satellite & BroadbandProducts Limited Warranty and Service Program Policy.* SCC-manufactured equipment in use from yeartwo through seven will be repaired by SCC factory-trained technicians to ensure exacting performance andspecification while remaining under the maximum service charge. The maximum service charge will be$150.00. Qualifying merchandise must be assigned a Satellite & Broadband Advance Repair number bySCC’s Customer Service Administrator. The equipment can then be shipped to SCC, freight prepaid. SCCwill return the equipment, freight prepaid. Repair charges will be applied at the out-of-warranty rate in theevent of physical or electrical abuse to in-warranty equipment. If SCC, in its sole discretion, determinesthat a major engineering design change is required, SCC will supply free parts, service information, andtechnical personnel to assist the customer.

•••• SERVICE INFORMATION

Upon request by a customer, applicable service information will be furnished for each of SCC’sInternational Satellite & Broadband products at no charge.

•••• PARTS AND PRICING

All items not considered to be receivers, LNBs, and accessories shall be considered as parts, and will beavailable at the dealer’s current applicable catalog price.

•••• RETURNED MERCHANDISE

Without the prior consent of SCC, no item purchased by customers hereunder may be returned to SCC forrefund or credit for any reason whatever.

•••• LITERATURE

A reasonable quantity of English language, international literature will be made available.

*NOTE: The Warranty and Service Program is subject to change or modification without notice.

Please address all correspondence to:Standard Communications Corp.P.O. Box 92151, Los Angeles, California 90009-2151Shipping Address: 1111 Knox Street, Torrance, CA 90502Telephone: (310) 532-5300 Extension 316 orTOLL FREE – (800) 745-2445FAX Nos.: Calif. & Int'l ONLY – (310) 532-0397 S09485105AAll other states – (800) 722-2329 Printed in U.S.A.

tvm series owner's manuallgcdn.surplustraders.net/media/manufacturer-spec/ts553.pdf · 2016....

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