communications lab manual

Printed in Canada

|3026866000511H~

Analog CommunicationsVolume 1

Instrumentation

Student Manual26866-00

Printed in Canada

|3026866000511H~

Analog CommunicationsVolume 1

Instrumentation

Student Manual26866-00

AB

ANALOG COMMUNICATIONSVOLUME 1

INSTRUMENTATION

bythe Staff

ofLab-Volt Ltd.

Copyright © 1990 Lab-Volt Ltd.

All rights reserved. No part of this publication may be reproduced,in any form or by any means, without the prior written permissionof Lab-Volt Quebec Ltd.

Legal Deposit – Fourth Trimester 1984

ISBN 2-89289-044-6

FOURTH EDITION, JUNE 1987

Printed in CanadaNovember 2005

Performing the Communications CoursewareUsing the Latest Versions of the Dual Function Generator

and True RMS Voltmeter / Power Meter

XI

A. Dual Function Generator, Model 9402-00 versus Model 9402-10

Completion of the exercises in this manual requires a Lab-Volt Dual FunctionGenerator, Model 9402-00 or 9402-10. These two models provide the same signals,but have different front panel controls. The manipulations in the hands-on exercisesof the Communications courseware have been written for the Model 9402-00 DualFunction Generator. If you perform the exercises using the Model 9402-10 DualFunction Generator, please take note of the following differences between the frontpanel controls of these two models of the Dual Function Generator (refer to Figures1 and 2 which show the front panels of the two models).

1. The display of the Model 9402-10 Dual Function Generator not only indicatesthe frequency of the signal produced by channel A or B (as on theModel 9402-00 Dual Function Generator), but also various settings related tothis channel.

2. The A and B channel-selection push buttons on Model 9402-00 are replacedwith a single A/B selection push button on Model 9402-10. The A/B selectionpush button allows selection between channels A and B of the Dual FunctionGenerator. The other channel is selected whenever the A/B button isdepressed. The function, frequency range, and attenuator settings of theselected channel are indicated in the display of the Model 9402-10 DualFunction Generator. When displayed, these settings can be modified using theFUNCTION, FREQUENCY RANGE, and ATTENUATOR push buttons

3. The sine-wave, square-wave, triangle-wave, sawtooth-wave, and pulseFUNCTION selection push buttons of channels A and B on Model 9402-00 arereplaced with a single FUNCTION selection push button on Model 9402-10, thatis common to both channels. The FUNCTION selection button is used inconjunction with the A/B channel selection push button to select the function ofeach channel. The function selected is indicated by a symbol in the display ofthe Model 9402-10 Dual Function Generator.

4. The 100-Hz, 1-kHz, 10-kHz, and 100-kHz FREQUENCY RANGE selection pushbuttons of channels A and B on Model 9402-00 are replaced with a singleFREQUENCY RANGE selection push button on Model 9402-10, that iscommon to both channels. The FREQUENCY RANGE selection button is usedin conjunction with the A/B channel selection push button to select thefrequency range of each channel. The frequency range selected is indicated inthe display of the Model 9402-10 Dual Function Generator.

5. The 0-dB, 20-dB, and 40-dB ATTENUATOR selection push buttons ofchannels A and B on Model 9402-00 are replaced with a single ATTENUATORselection push button on Model 9402-10, that is common to both channels. TheATTENUATOR selection button is used in conjunction with the A/B channelselection push button to select the attenuator of each channel. The attenuatorselected is indicated in the display of the Model 9402-10 Dual FunctionGenerator.



XII

A

FUNCTION

B

A

B

MAX.MIN.

OUTPUTS

POWER

40

B

A

AHz

kHz

SYNC. / TTLOUTPUTS

A

HzFREQUENCY RANGE

FREQUENCY MODULATION

B

B

0

B

DEVIATION

BMAX.MIN.

INPUT

10 k1 k100

B

100 k

(CHANNEL A)A A A

ATTENUATORdB

MAX.MIN.

20

FREQUENCY

DUAL FUNCTION GENERATOR9402-00OUTPUT FREQUENCY

OUTPUT LEVEL

6. The control knobs used to set the durations of the pulse signals of channels Aand B are referred to as the PULSE DURATION control knobs on theModel 9402-10 Dual Function Generator.

7. Independent FREQUENCY and OUTPUT LEVEL control knobs for channels Aand B are still provided. However, their positions on the front panel havechanged.

8. When the frequency is set to 100.00 kHz or more, the display on theModel 9402-10 Dual Function Generator does not flash as is the case on theModel 9402-00 Dual Function Generator.

Figure 1. Front panel of the Dual Function Generator, Model 9402-00.



XIII

DUAL FUNCTION GENERATOR9402-10

DURATION

B

A

B

AFREQUENCY

PULSE

MIN. MAX.

MIN. MAX.

MIN. MAX.

OUTPUT

A A

B B

FREQUENCY RANGE

ATTENUATORFUNCTION

A/B

POWER

LEVEL

(OUTPUT A)FREQUENCY MODULATION

DEVIATIONINPUT

OUTPUTSSYNC. / TTLOUTPUTS

B

A

SELECTS BETWEEN THESINE-WAVE, SQUARE-WAVE,

TRIANGLE-WAVE, SAWTOOTH-WAVEAND PULSE FUNCTIONS A OR B

CHANNELSELECTS

AND SETTINGS ASSOCIATEDWITH THE SELECTED CHANNEL

DISPLAYS THE FREQUENCYSELECTS BETWEENTHE 100-Hz, 1-kHz,

10-kHz, AND 100-kHzFREQUENCY RANGES

SELECTS BETWEENTHE 0-dB, 20-dB,

AND 40-dBATTENUATORS

CONTROLKNOBS

FREQUENCYDURATION

PULSE

CONTROLKNOBS

(CHANNELS A AND B) (CHANNELS A AND B)

CONTROLKNOBS

LEVELOUTPUT

(CHANNEL A)

DEVIATIONCONTROL KNOB

MODULATIONFREQUENCY

Figure 2. Front panel of the Dual Function Generator, Model 9402-10.



XIV

SCALECHANGE

dBm

dBm27 7 13 33

RANGEmV

10 100V

1 10

MODEVOLTINPUT

1 Mæ

TRUE RMS VOLTMETER / POWER METER

[ 0 dBm = 1mW in 50 æ ]

9404-00

POWER

53

100

ZERO ADJUST

B. True RMS Voltmeter / Power Meter, Model 9404-00 versus Model 9404-10

Completion of the exercises in this manual requires a Lab-Volt True RMSVoltmeter / Power Meter, Model 9404-00 or 9404-10. These two models are verysimilar except for a few minor changes. The manipulations in the hands-onexercises of the Communications courseware have been written for theModel 9404-00 True RMS Voltmeter / Power Meter. If you perform the exercisesusing the Model 9404-10 True RMS Voltmeter / Power Meter, please take note ofthe following differences between these two models of the True RMS Voltmeter /Power Meter (refer to Figures 3 and 4 which show the front panels of the twomodels).

1. The 100 V (+53 dBm) range on the Model 9404-00 True RMS Voltmeter /Power Meter is not available on the Model 9404-10, True RMS Voltmeter /Power Meter. This range is not required to complete the hand-on exercises inthis manual.

2. A ZERO ADJUST knob is provided on the Model 9404-00 True RMS Voltmeter /Power Meter to manually zero the unit before taking measurements. There isno ZERO ADJUST knob on the Model 9404-10 True RMS Voltmeter / PowerMeter, because zero adjustment is performed automatically by the unit. An LEDon the front panel of the Model 9404-10 True RMS Voltmeter / Power Meterlights up whenever zero adjustment is performed.

Figure 3. Front Panel of the True RMS Voltmeter / Power Meter, Model 9404-00.



XV

SCALECHANGE

ADJUSTINGZERO

POWER (dBm)

dBm27 7 13 33

RANGEmV

10 100V

1 10

MODEVOLTAGE (V)INPUT

1 Mæ

TRUE RMS VOLTMETER / POWER METER

[ 0 dBm = 1mW in 50 æ ]

9404-10

POWER

THE MAXIMUM RANGE IS10 V (+33 dBm) INSTEAD

OF 100 V (+53 dBm)LIGHTS UP WHENEVER ZERO

BY THE UNIT. THIS LED

ADJUSTMENT IS PERFORMED.

ZERO ADJUSTMENT IS NOWPERFORMED AUTOMATICALLY

Figure 4. Front Panel of the True RMS Voltmeter / Power Meter, Model 9404-10.

ANALOG COMMUNICATIONS –VOLUME 1INSTRUMENTATION26866-00First Edition: June 1987Printed: November 2005

We Value Your Opinion!

Please take a few minutes to complete this questionnaire. Your answers andcomments will enable us to produce better manuals. Return it to the address on thereverse side of this page or ask your instructor to forward it.

How long are the exercises?

G Too long G Adequate G Too short

Do the Discussions cover enough information?

G Too little G Acceptable G Too much

How easy to follow are the Procedures?

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How useful is the Procedure Summary?

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How many hours were required per exercise?

G 1 G 2 G 3 or more

PUBLICATION ERRORS AND COMMENTS

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If you want to receive the corrected pages, please fill in the identification section.

BACKGROUND INFORMATION

G Instructor G Student

G High School G Vocational G Technical Institute G University

IDENTIFICATION

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ADDRESS

PHONE FAX

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