SIGNAL ANAL YZERSModulation Analyzer,Models 8901A, 89018

Measures AM and FM to 1% accuracyMeasures RF frequencyMeasures RF Power

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HP 8901A

HP 8901A and HP 89018 ModulationAnalyzers

The HP 8901A and HP 8901 B Modulation Analyzers combine thecapabilities of several Rf instruments to give complete. accuratecharacterization of modulated signals in the 150 kHz to 1300 MHzfrequency range. Both instruments very accurately measure modula-tion and rccover the modulation signal. They determine RF frequen-cy and measure RF power. The major additional capabilities of theHP 8901 Bare its improved power meter accuracy. its ability to useexternal power sensors. to make adjacent channel power measure-ments or carrier noise measurements (with options 030-037) and itsability to count audio frequencies and measure distortion on 400 Hzand 1 kHz signals. Both instruments are fully automatic and make allmajor measurements with the push of a key or under HP-IB control.

Modulation Measurement Accuracy .

Very accurate modulation measurements along with very low inter.nal noise enable the HP 890 I A/B to characterize even high perform-ance signal sources. Their detection systems are configured forwideband recovery of the entire modulation spectrum so that highlyprecise measurements such as signal-to-noise or distortion can bemade on the modulation signal. Modulation depth and deviation ac-curacy is generally % I % of reading. Residual AM noise in a 50 Hz to3 kHz bandwidth is <0.01% while FM noise is <8 Hz for 1300 MHzcarrier frequencies. decreasing linearly to < I Hz below 100 MHz.Because the AM and FM demodulators are independent and highlyinsensitive to each other and because the analyzer has very lowresidual AM and FM. accurate incidental AM and FM measure-ments can be made.

Three detectors are available for depth and deviation measure-ments: positive peak. negative peak, and an averageoresponding deotector with rms (sinewave) calibration. A PEAK HOLD functioncaptures and displays the maximum peak modulation of a signal andis ideal ror making transient measurements such as modulation limit-ing on mobile radios. The HP 890 I B also has a true rms detector andthe ability to measure peak to peak divided by two.

For measuring convenience. two high-pass (50 Hz and 300 Hz) andthree low-pass (3 kHz. 5 kHz and >20 kHz) post-detection filters rorfiltering the recovered modulation are included. The >20 kHz Besselfilter minimizes overshoot on square-wave modulation. This allowsaccurate measurement or signals which are digitally modulated, suchas FSK. Four de-emphasis networks commonly used in FM systems(25.50.75. and 750 ilS) are also provided.

A modulation output provides calibrated signal levels relative tothe displayed modulation reading. The HP 8901 B can make measure-ments on this demodulated signal such as rrequency and distortionlevel.

Modulation calibrators (standard on the HP 8901 B. Option 010 onthe HP 890 IA) provide two precision modulation standards. One isan amplitude modulated signal whose depth is calibrated to betterthan 0.1 % accuracy. The second standard is a rrequency modulatedsignal with peak deviation calibrated to 0.1% accuracy. Tbe HP11715A AM/FM Test Source is necessary to rully test and calibrateother modulation parameters.

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FrequencyMeasurementsThe HP 890lAjB Modulation Analyzers are more than just high

quality modulation meters. They also perform as frequency counters.Resolution for the HP 8901 A'~ 150 kHz to 1300 MHz frequencycounter is 10 Hz below 1000 MHz and 100 Hz above 1000 MHz.Resolution is 10 Hz for the HP 8901B. Sensitivity is -25 dBm (12mV rms) below 650 MHz and -20 dBm (22 mV rms) above 650MHz. The standard instrument's time base stability isIxIO-6jmonth, or an optional time base is available with Ixl0-9jdaystability.

RF Power MeasurementsThe HP 890lA uses a diode detection circuit to measure RF input

power. This technique measures peak vortage and is calibrated from 1m W to 1 W for sinewave input~. The RF level measurement accuracyis ",1.5 dB from 150 MHz to 1300 MHz.

The HP 8901 B delivers the accuracy and resolution of a high per-formance power meter. The HP 8901 B, with the HP 11722A SensorModule, measures power from +30 dBm to -20 dBm at frequenciesfrom 100 kHz to 2.6 GHz. The HP 8901 B also accepts all HP 8480series power sensors for extended measurement capability.

Adjacent Channel Power and Direct SpectrumPhase Noise Measurements

The HP 8901 B olfers optional selective power measurement capa-bility (options 030-037). With this capability you can quickly andaccurately make adjacent channel power measurements to CEPTstandards. The HP 8901 B provides a choice of selectable filters fortesting transceivers with 12.5, 20, 25 and 30 kHz channel spacings.

To meet the CEPT standard at frequencies greater than 300 MHz,the HP 890lB requires an externallocal oscillator (LO) such as theHP 8656B Synthesized Signal Generator. Dedicating a signal gener-ator as the external LO is not necessary. When not being used as theLO, a built-in RF switch in the HP 890 I B routes the signal genera-tor's output out the back panel.

Used with a low-phase-noise external LO, the HP 8901 B alsomakes single-sideband (SSB) phase noise measurements to 1.3 GHz.To make the phase noise measurement, you just select the carriernoise filter and the frequency olfset from the carrier (5 kHz to 1300MHz). The HP 89018 then makes a selective power measurement(2.5 kHz BW) and converts the power to a I Hz bandwidth. The noiseftoor of the HP 89018 is -150 dBcjHz. The HP 8901 B's measure-ment accuracy is better than ",0.5 dB down to -139 dBc. Adding theHP 11793A Microwave Converter and a low-phase-noise microwavesource such as the HP 86738 Synthesized Signal Generator extendsthis measurement to 26.5 GHz.

HP 8901A/89018 SpecificationsRF InputFrequency range: 150 kHz to 1300 MHzOperating Level150 kHz-650 MHz: 12 mVrms to 7 Vrms650 MHz-1300 MHz: 22 mVrms to 7 VrmsInput impedance: 50 n nomina!Tuning: manual frequency entry, automatic, or track (frequencies> 10 MHz only).

Acquisition time (automatic operation): -1.5 seconds.Maximum safe input level (typical): ac: 35 Vrms (25 W ror sourceSWR <4): dc: 40 V.

Frequency ModulationRates150 MHz-10 MHz: 20 Hz to 10 kHz10 MHz 1300 MHz: 20 Hz to 200 kHz10 MHz-1300 MHz: 20 Hz to 20 kHz with 750 ~ filter.

Devjations150 kHz-10 MHz: 40 IcHz peak maximum10 MHz-1300 MHz: 400 kHz peak ma~imum10 MHz-1300 MHz: 40 IcHz peak maximum with 750 llS filter.

Accuracy1,2250 kHz-10 MHz: :2% of reading : 1 digit, 20 Hz to 10kHz rates.10 MHz-1300 MHz: :1% of reading :1 digit, 50 Hz to 100 kHzrates; =5% of reading : 1 digit, 20 Hz to 200 kHz rates.

Demodulated Output Distortion~400 kHz 10 MHz: <0.1 % THD, deviations < 10kHz.10 MHz-1300 MHz: <0.1% THD. rates and deviations <100 kHz.AM rejection (for 50% AM at 400 Hz and 1 kHz rates)': <20 Hzpeak deviation measured in aSO Hz to 3 kHz BW.Residual FM (50 Hz to 3 kHz BW): <8 Hz rms @ 1300 MHz.decreasing linearly with frequency to < 1 Hz rms foT 100 MHz andbelow

Maximum Deviation Resolution0.1 Hz (rms detector on HP 8901 B only), 4 kHz peak deviationI Hz, <4 kHz peak deviation10 Hz. 4 kHz to 40 kHz peak deviation100 Hz, 40 kHz to 400 kHz peak deviationResolution is increased one digit with 750 jJ.s de-emphasis and predis-play "on" and with rms detector.Stereo separation (50 Hz to 15 kHz): >47 dB typical.

Phase ModulationCarrier frequency: 10 MHz 101300 MHz.Rates: 200 Hz to 20 kHz; typically usablc from 20 Hz to 100 kRzwith degraded performanceDeviation and Maximum Resolution

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Accuracy': .:3% of reading z I digitDemodulated output distortion: <0.1 % THDAM rejection (tor 50% AM at 1 kHz rate)1: <0.03 radian peakdeviation (50 Hz to 3 kHz BW)

Amplitude ModulationRates150 kHz-IO MHz: 20 Hz to 10 kHz10 MHz-1300 MHz: 20 Hz to 100 kHz.Depth: to 99%

SIGNAL ANAL YZERS B

Accuracy',2,4150 kHz-10 MHz: :1:2% ofreading:l:l digit, SO Hz to 10 kHz rates,> 5% depth; :1:3% of reading :I: I digit. 20 Hz to 10kHz rates.10 MHz-1300 MHz: :1:1% of reading :1:1 digit. SO Hz to SO kHzrates. > 5% depth; %3% of reading % I digit. 20 Hz to 100 kHz rates.

Flatness (variatIon In Indicated AM depth lor constant depthon input signal): 10 MHzto 1300 MHz: :l:0.3%ofreading:l: 1 digit.90 Hz to 10 kHz rates, 20 to 80% depth.Demodulated output distortion: <0.3% THD fot ~50% depth;<0.6% THD for ~95% depth.FM Rejection (at 400 Hz and 1 kHz rates, 50 Hz to 3 kHz BW)'250 kHz to 10 MHz: <0.2% AM far <S kHz peak deviation.10 MHz to 1300 MHz: <0.2% AM for <SO kHz peak deviation.Residual AM (50 Hz to 3 kHz BW): <0.01% rrns.Maximum Depth Resolution001% for depths $39.99%; 0.1% for depths ?;40%. Resolution in-creases 1 digit with rms detector (HP 8901 B only).

Frequency CounterRange: 150 kHz-1300 MHz.Accuracy: ""J counts of least significant digit,: reference accuracy.Internal Reference

Frequency: 10 MHz.Aging rate: < Ix10-6 jmonth (optionaI5: IxI0-9jday).

Maximum ResolutionHP 8901A: 10 Hz fot frequencies < 1 GHz; 100 Hz for frequencies~I GHz.HP 89018: 10 Hz.

HP 8901A RF Level (Peak Voltage Responding, RMSSine Wave Power Calibrated)Range: 1 mW to IWInstrumentation accuracy: '" 1.5 dB (150 kHz to 1300 MHz); 0.7dB typical.SWR: $650 MHz; $1.3; 1300 MHz: ~1.5.Resolution: 0.1 m W ror level 0.1 to IW.0.01 mW ror levels 0.01 to 0.1 W.0.001 mW ror levels <O.OIW.

HP 89018 RF Level (True RMS)Frequency range with HP 11722A: 100 kHz to 2.6 GHz.Power range: -20 dBm to + 30 dBmRF Range Linearity (Using Recorder Output)",0.02 dB, RF ranges 2 - 5

",0.03 dB, RF range IUsing front-panel display. acid % 1 count of least-signiticant digit.

RF Range.to-Range Ch.nge Error",0.02 dB/RF range change from reference rangeInput SWR: < 1.15, using HP 11722A Sensor ModuleZero Set (Digital Se«ability of Zero)",0.07% of full scale on lowest range.

Decrease by a factor of 10 for each high range.RF Power Resolution0 l % of fu!! scale in watts or volts mode,0.01 in dBm or dB relative mode.

. P.- relidulll muat be 8CCCKInted lOf .. peak reedinga.. BIll not loexceed: 50 Hz 10.0 kHz rat. ror staled KCUracywilh mladetector(HP~1BonIy)., Wlth 750 ,. ~ end ~1ap18y "otf', clatortion la not apecitI8d Ior modWatton CMIt-

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MOdulalkln ~. kllhe worat -, l/i8 can ~ KCUrICy by O. 1% 01 reacIng Ior eadI0.1% of cIetortlon.

. An. 30 day warm-up.

SIGNAL ANAL VZERSModulation Analyzer, 150 kHz to 1300 MHz; AM/FM Test Source8

(Si]Models 8901A, 8901B, 11715A

HP 89018 Selective Power Measurements (options030-037)Frequency r.nge: 10 MHz lO 1.3 GHzC.rrier power r.nge: +30 dem lo -20 dem. 12.5.20.25 and 30koHz filters: +30d8m lO -10 dem. Carrier Noise FilterDyn.mic r.nge: 115 dB.C.rrier rejection (temp. ~35° C): >90 dB, für offsets ~ 1 channeJspacing Of ~ kHz, whichevcr is targer.Relative accuracy: :0.5 dB. SSB Power ~-95 dBc or SSB Power? -139 d8c/HzFilter bandw~ths: 2.5 kHz, Carrier Noise Filter

8.0 kHz, 12.5 kHz Filter15.0 kHz. 20/25 kHz Filter30.0 kHz. Cellular Radio Filter

Power ReferencePower output: I 00 m W Factory set to :*:0. 7~. traccable to the U.S.

National Bureau of Standards.Accur8cy: * 1.2% worst case (*°.9% rss)55°C).

Audio FiltersHigh pa.. (3 dB cutoff trequency): 50 Hz and 300 HzLow pa.s (3 dB cutoff trequency except >20 kHz filter): 3 kHz,15 kHz. >20 kHzDe-emphasis filters: ;.' ,,5. 50 "s. 75 ,,5, and 750,.s.

Calibrators (Standard HP 89018, Option 010HP 8901A)AM calibretor depth end accurecy: 33.33% deplh. nominal; inter-nally calibrated to an 3ccuracy of ",0.] %.FM calibretor devietion end accuracy: 34 kHz peak deviation.nominal: internally calibrated 10 an accuracy of .+.0.1 %.

General CharacteristicsOperating temperature range: O' 10 55°C.Power requirement.: 100, 120,220, Of 240 V ac (+5, -10%);48-66 Hz: 200 VA maxWeight: HP 8901A-nel 20 kg (44 Ib), sbippins 25 ks (55 Ib); HP8901 B-nel 23 kg (52 Ib), shipping 31 kg (69 Ib).Size: HP 8901 A. 190 mm H x 425 mm W x 468 mm D (7.5 in. x 16.8in. x 18.4 in.); HP 89018,190 mm H x 425 mm W x 551 mm D (7.5in. x 16.8in.x21.7in.)

Ordering Information PrlceHP 8901A Modulation Analyzer S9240

Option 001: Rear panel connectors SIOOOption 002: 1 x 1 0-9/day interna I reference S650Option 003: Connections for externallocal oscilla- S400torOption 004: Operation from 48 to 440 Hz power S275(Temp. <40°C)Option 010: AM and FM calibrators S625

HP 89018 Modulation Analyzer SI 3040Option 001: Rear panel connectors S200Option 002: I x I 0-' /day internal reference S650Option 003: Connections for externallocal oscilla- S4OOtorOption 004: Operation from 48 to 440 Hz power S275(Temp. <40°C)Option 030: High sdectivity (select only 2 filter options) $2400Option 032: 12.5 kHz filter N/COption 033: 20.0/25.0 kHz filter N/C-.Option 035: Cellular Radio Filter N/COption 037: Carrier Noise Filter . -:b.J Ir

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AM OutputFrequency range (AM FM -c 32 output): 11 to 13.5 MHzDepth: to 99~Distortion

50% AM, 20 Hz to 100 kHz rat..: <0.05% THD «-66 da)15% AM, 20 Hz to 100 kHz rat..: <0.1% THD «-60 da)

Flatness: 50 Hz to 50 kHz rates, :100.1%;20 Hz 10100 kHz rates, ",0.25%Linearity: <95% AM, :100.1 %; <99% AM, ~0.2%