HP 8903B Audio Analyzer HP 8903E Distortion Analyzer Technical
Contents
1. N 20Hz 50Hz Hz 2kHz 5 kHz 20 KHz Frequency co a a a 2 5 2 5 pa 2 ao i a cc Typical residual distortion and noise of the source and analyzer combi ned source voltage set to 1 5V 80 kHz BW Dashed line represents typical residual distortion and noise for the analyzer only Flatness Supplemental Characteristics Response dB 0 1 0 15 0 2 20Hz 50Hz 100Hz 200Hz 500Hz kHz 2kHz SkHz 10kHz 20kHz 50 kHz 100 kHz Frequency Typical flatness of source and analyzer combi ned source voltage set to 1V 1 kHz reference Signal To Noise FREQUENCY RANGE 50 Hz to 100 kHz DISPLAY RANGE 0 to 99 99 dB ACCURACY 1 dB INPUT VOLTAGE RANGE 50 mV to 300 V RESIDUAL NOISE the higher of 80 kHz BW 85 dB or 17 pV 500 kHz BW 70 dB or 50 pV Supplemental Characteristics TIME TO RETURN FIRST MEASUREMENT lt 2 5s MEASUREMENT BATE 1 reading per second RESOLUTION same as Listed under SI XAD on next page Source Specifications HP 8903B only Frequency RANGE 20 Hz to 100 kHz RESOLUTION 0 3 ACCURACY 0 3 of setting Output Level RANGE 0 6 mV to 6 V open circuit RESOLUTION 0 3 or better ACCURACY open circuit 2 of setting 60 mV to 6 V 20 Hz to 50 kHz 3 of setting 6 mV to 6 V 20 Hz to 100 kHz 5 of setting 0 6 mV to 6 mV 20 Hz to 100 kHz2. In the quest for higher output power many audio ampli fiers use bridged output stages Such amplifiers can be difficult to characterize because their outputs cannot be grounded To test these devices the usual approach has to been to use a balanced calibrated isolation transformer connected to an analyzer with an unbal anced input Balanced inputs on the HP 8903B and HP 8903E make transformers unnecessary Simply float the analyzer input and connect the bridged device directly and you are ready to make measurements Balanced analyzer inputs make testing bridged amplifiers easy and fast Audio Applications Choose the Filters for Your Applications Internal plug in filters simplify your audio measure ments by providing weighting networks required by in ternational standards Among the filters available are the CCIR weighting filter CCIR ARM weighting filter and the ANSI A weighting filter In addition to these filters both analyzers come with selectable 30 kHz and 80 kHz low pass filters to reject unwanted out of band signals and noise 80 kHz low pass 30 kHz low pass 400 Hz high pass CCITT weighting CCIR weighting C Message weighting CCIR ARM weighting A weighting These are plug in filters any two can be installed in either analyzer High Performance Distortion Capability Distortion measurements are fast and accurate With a single keystroke the analyzers count the input signal autorange for maximum
3. FLATNESS 1 kHz reference 0 7 0 06 dB 20 Hz to 20 kHz 2 5 0 22 dB 20 Hz to 100 kHz DISTORTION AND NOISE the higher of 80 kHz BW 80 dB or 15 pV 20 Hz to 20 kHz 500 kHz BW 70 dB or 38 pV 20 Hz to 50 kHz 65 dB or 38 pV 50 kHz to 100 kHz IMPEDANCE 600 Q 1 or 50 Q 2 front panel or HP IB programmable 47 special function Supplemental Characteristics Frequency Switching SPEED lt 3 ms Does not include HP IB programming time OUTPUT LEVEL Switching SPEED 20 ms Does not include HP IB programming time SWEEP MODE log sweep with up to 500 points per lecade or 255 points total between i entered start and stop frequenci es HP 8903B and HP 8903E Analyzer Specifications Distortion FUNDAMENTAL FREQUENCY RANGE 20 Hz to 100 kHz DISPLAY RANGE 0 001 to 100 99 99 to 0 dB ACCURACY 1 dB 20 Hz to 20 kHz 2 dB 20 kHz to 100 kHz INPUT VOLTAGE RANGE 50 mV to 300 V RESIDUAL DISTORTION AND NOISE the higher of 80 kHz BW 80 dB or 15 pV 20 Hz to 20 kHz 500 kHz BW 70 dB or 45 pV 20 Hz to 50 kHz 65 dB or 45 pV 50 kHz to 100 kHz Supplemental Characteristics 3 dB Measurenent BANDWIDTH 10 Hz to 500 kHz DETECTION truerms or rms cali brated average DISPLAYED RESOLUTION 0 0001 lt 0 1 distorti on 0 001 0 1 to 3 di storti on 0 01 3 to 30 di storti on 0 1 gt 30 di storti on TIME TO RETURN FIRST MEASUREMENT 1 5s MEASUREMEN
4. performance and display the result Typical time to return the first distortion mea surement is 1 5 seconds with a measurement rate of two readings per second thereafter Residual distortion and noise for the analyzer sections is specified to be less than 80 dB from 20 Hz to 20 kHz in an 80 kHz measurement bandwidth Simplicity in Stimulus Response Testing With its internal audio source and microprocessor the HP 8903B performs swept frequency response swept distortion and signal to noise measurements automati cally Making swept measurements with the HP 8903B is very easy For example to check the frequency response of an active filter only a few steps are required After con necting the device and setting the required source level you need only to enter the sweep start and stop fre quencies and then press the sweep key You can have a hard copy plot of your results using an analog X Y recorder with a few extra keystrokes HP 8903B Source Device Under Test X Input Y Input Pen Lift X Y Recorder X Y Recorder setup diagram Automatic Signal To Noise Measurements For signal to noise measurements the HP 8903B moni tors the ac input level while turning the source on and off and displaying the ratio With optional plug in fil ters you can perform weighted signal to noise mea surements easily accurately and in real time Transmitter and Receiver Tests The analyzers have se
5. L HEWLETT PACKARD HP 8903B Audio Analyzer HP 8903E Distortion Analyzer 20 Hz to 100 kHz The Versatile Choice for Technical Specifications Audio Analysis B ER pent m soo ANA ww KA pac A aewore No aesse RMS q Vi Detectie a9e Quas p Pluss eak ah Filters Stortion Lever Noi Sweep se HP 8903B Audio Analyzer Special function 47 switches source OUTPUT IMPEDANCE 50 or 600 ohms to provide higher output into lower impedance loads 17 dBm into 600 ohms in 50 ohm position HEWLETT 8903B PACKARD AUDIO ANALYZER Q LOG LIN key allows results to be displayed in linear or log units Log mode displays readings in dBm into 600 ohms w hen measuring AC level RATIO key permits display in dB or percent relative to an entered or measured value Low noise input amplifier provides superior analyzer performance SOURCE f J OUTPUT I MEASUREMENT E 20 Hz 100 kHz ac LEVEL SINAD Special functions control detector response rms average rms calibrated and quasi peak responses are available Audio source output level from 0 6 mV to 6 V open circuit 20 Hz to 100 kHz Log SWEEP allows measurement of frequency response and swept distortion automatically HP 8903E Distortion Analyzer LOG LIN key allows results to be displayed in linear or log units Log mode
6. T RATE 2 readings per second SINAD FUNDAMENTAL FREQUENCY RANGE 20 Hz to 100 kHz DISPLAY RANGE 0 to 99 99 dB RESIDUAL DISTORTION AND NOISE same as listed under distortion ACCURACY 1 dB 20 Hz to 20 kHz 2 dB 20 kHz to 100 kHz INPUT VOLTAGE RANGE 50 mV to 300 V Supplemental Characteristics DETECTION truerms or rms calibrated average RESOLUTION HP 8903B 0 01 dB for SINAD ratios gt 25 dB For ratios lt 25 dB thedisplay is rounded to the nearest 0 5 dB to reduce digit Flick ering of noisy signals full resolution is available via special function 16 1 powers up with special function 16 1 acti ve for 0 01 dB resolution at all SINAD ratios ANALOG METER HP 8903B only Activein SINAD mode only and for SINAD ratios up to 18 dB 24 dB using special function 7 1 1 0 dB typical accuracy HP 8903E TUNING HP 8903B notch filter is tuned to the internal audio source frequency HP 8903E notch filter is tuned to the counted input frequency TIME TO RETURN FIRST MEASUREMENT 1 5s MEASURE MENTS RATE 2 readings per second AC Level FULL RANGE DISPLAY 300 0 V 30 00 V 3 000 V 3000 V 30 00 mV 3 000 mV 0 3000 mV OVER RANGE 33 except on 300 V range ACCURACY rms and average detection 2 50 mV to 300 V 20 Hz to 20 kHz 4 0 3 mV to 50 mV 20 Hz to 100 kHz 4 50 mV to 300 V 20 kHz to100 kHz Supplemental Characteristics AC CONVERTER true rms responding for signals with cr
7. TING FILTER CCIR rec 468 2 average responding meter Dolby Labs Bulletin No 19 4 Deviation from Ideal Response Same as listed under CCIR WEIGHTING FILTER above A WEIGHTING FILTER IEC rec 179 and ANSI 1 4 type 1 sound level meter Deviation from Ideal Response 0 1 dB at 1 kHz 0 5 dB 20 Hz to 10 kHz 1 0 dB 10 kHz to 20 kHz HP 8903B and HP 8903E General Specifications HP 8903B REAR PANEL FEATURES HP IB Connector X Y recorder outputs and PENLIFT control for swept measurement MONITOR output provides a scaled output of the input signal In SINAD distortion and distortion level modes the fundamental is removed Front Rear Panel Outputs Supplemental Characteristics RECORDER OUTPUTS HP 8903B only X axi S 0 10 Vdc corresponding to log of oscillator frequency Output resistance 1kQ Y axis 0 10 Vdc corresponding to displayed value and entered plot limits Output resistance 1 KQ Penlift TTL output MONITOR OUTPUT Output impedance 600 AC leva mode provi des a scaled output of the input signal SINAD distortion and di storti on level modes provi de a scaled output of the i nput si gnal with the fundamental removed HP 8903E RE AR PANEL FEATURES HP IB Connector Analyzer Input INPUT TYPE Balanced full differential INPUT IMPEDANCE 100 kQ 1 shunted by lt 300 pF each side to ground In de level made the input resistance is 101 KQ 1 MAXIMUM INPUT Maxim
8. ands J apan Hewlett Packard Japan Ltd Measurement Assistance 9 1 Takakura cho Hachioji shi Tokyo 192 Japan Latin America Hewlett Packard Latin American Region Headquarters 5200 Blue Lagoon Drive 9th Floor Miami Florida 33126 U S A 805 267 4245 4220 Australia New Zealand Hewlett Packard Australia Ltd 31 41 Joseph Street Blackburn Victoria 3130 Australia 1 800 629 485 Asia Pacific Hewlett Packard Asia Pacific Ltd 17 21 F Shell Tower Times Square 1 Matheson Street Causeway Bay Hong Kong Tel 852 2599 7777 81 426 56 0732 Data subject to change Fax 81 426 56 7840 Hewlett Packard Company 1998 Printed in U S A 1 98 5953 8429
9. asuring low level ac signals With a full range ac level display of 3000 mV and an accuracy of 2 percent of reading V gt 50 mV 20 Hz to 20 kHz the analyzers accurately char acterize these small ac signals The HP 8903E provides high performance distortion analysis for ATE applications where an external audio source is used Flexible ATE Source The HP 8903B has enhanced ATE capabilities with its internal low distortion source Rapid source program ming mode enables the internal oscillator to be directly programmed through HP IB with five bytes Addition ally the source has switchable output impedance 50 or 600 ohms With a choice of source output impedance you can match the HP 8903B to the instru ments in your ATE system In the 50 ohm position the HP 8903B delivers 17 dBm into a 600 ohm load HP 8903B Specifications SPECIFICATIONS describe the instrument s warranted performance Supplemental Characteristics shown in italics are intended to provide information useful in applying the instrument by giving typical but non warranted performance parameters System Specification HP 8903B only source and analyzer combined Distortion RESIDUAL DISTORTION AND NOISE the higher of 80 kHz BW 80 dB or 17 py 20 Hz to 20 kHz 500 kHz BW 70 dB or 50 pV 20 Hz to 50 kHz 65 dB or 50 pV 50 kHz to 100 kHz Supplementaltal Characteristics Source and Analyzer
10. displays readings in dBm into 600 ohms when measuring ac level HEWLETT 8903E ca PACKARD AUDIO ANALYZER REMOTE Plug in filters add measurement flexibility to the HP 8903B and HP 8903E Both instruments have two slots which can be filled with any combination of six optional filters Analog meter for SINAD mode provides easier reading when measuring noisy Signals RATIO key permits display in dB or percent relative to an entered or measured value Balanced full differential input allows testing of bridged amplifiers and other devices with floating outputs Maximum input voltage is a full 300 volts differential or applied to either the high or low input Low noise input amplifier provides superior analyzer performance MEASUREMENT iE s ac LEVEL pisTN snan NO FILTER NOTCH TUNE HOLDS Front panel MONITOR output provides a scaled output of the input signal In SINAD and distortion modes the fundamental is removed NOTCH TUNE key allows the user to lock the notch filter at any measured input frequency This is useful when measuring very noisy signals in distortion and SINAD modes Plug in filters add measurement flexibility to the HP 8903B and HP 8903E Both instruments have two slots which can be filled with any combination of six optional filters Front panel key allows s
11. e is within the requirements of RE02 of MIL STD 461B and FTZ 526 527 11 CONDUCTED AND RADIATED SUSCEPTIBILITY meets the requirements of methods CS01 CS02 and RSO3 1V meter of MIL STD 461B dated 1980 ORDERING INFORMATION ANALYZER MAINFRAMES HP 8903B AUDIO ANALYZER Option 001 rear panel input and output Option 910 provides additional operation calibration manual 08903 90079 and two service manuals 08903 90062 Option 915 add service manual 08903 90062 Option W30 3 year return repair service HP 8903E DISTORTION ANALYZER Option 001 rear panel input and output Option 910 provides additional operation calibration manual 08903 90053 and two service manuals 08903 90065 Option 915 add service manual 08903 90065 Option W30 3 year return repair service OPTIONS FOR BOTH HP 8903B AND HP 8903E Option 907 front handle kit Option 908 rack flange kit Option 909 rack flange kit with front handles INTERNAL PLUG IN FILTER OPTIONS LP FILTER LOW PASS 30 kHz 80 kHz Two band limiting low pass filters are standard Optional high pass and weighting filters can be fitted to match your requirements 400 Hz CCITT WEIGHTING HIGH PASS Both the HP 8903B and HP 8903E have two plug in fil ter positions which can be loaded with any of six op tional filters The standard HP 8903B and HP 8903E come with no plug in filters You must order the appro priate filter options
12. e or 60 dB per decade 80 kHz LOW PASS FILTER 3 dB Cutoff Frequency 80 kHz 4 kHz Rolloff Third order Butterworth 18 dB per octave or 60 dB per decade Plug in Audio Filters al CCITT Weighting Filter Response dB 00 Hz High pass Filter 1 kHz 100 kHz Frequency 400 Hz HIGH PASS FILTER 3 dB Cutoff Frequency 400 Hz 40 Hz Rolloff Seventh order Butterworth 42 dB per octave or 140 dB per decade CCITT WEIGHTING FILTER CCITT rec P53 Deviation from Ideal Response 0 2 dB at 800 Hz 1 0 dB 300 Hz to 3 kHz 2 0 dB 50 Hz to 3 5 kHz 3 0 dB 3 5 kHz to 5 kHz H 10 Plug in Audio Filters H CCIR Weighting Filter Response dB C Message Weighting Filter Loo l T T 10 kHz 100 kHz Frequency CCIR WEIGHTING FILTER CCIR rec 468 2 Deviation from Ideal Response 0 1 dB at 6 3 kHz 2 dB 6 3 kHz to 7 1 kHz 4 dB 7 1 kHz to 10 kHz 5 dB 200 Hz to 6 3 kHz 0 dB 31 5 Hz to 200 Hz 10 kHz to 20 kHz 2 0 dB 20 kHz to 31 5 kHz C MESSAGE WEIGHTING FILTER Per BSTM 41004 Deviation from Ideal Response 0 1 dB at 1 kHz 1 0 dB 60 Hz to 5 kHz Hoe It It rococo Plug in Audio Filters A Weighting Filter Response dB CCIR ARM Weighting Filter 1 kHz 100 kHz Frequency CCIR ARM WEIGH
13. election of rms or average rms calibrated detector response Quasi peak detector response available via HP IB programming DESIGNED FOR SYSTEMS Balanced full differential input has a maximum input voltage of 300 volts differentially or applied from the high input to ground and 30 volts applied from the low input to ground HP IB Not just IEEE 488 but the hardware documentation and Support that delivers the shortest path to a measurement system Transceiver Tests Both the HP 8903B and HP 8903E have been optimized for receiver testing For SINAD measurements extra filtering and smoothing circuits yield more accurate and repeatable results With its built in source the HP 8903B makes signal to noise measurements on AM receivers using similar smoothing techniques Transmitter testing is also easy In conjunction with the HP 8901A HP 8901B or HP 8902A modulation analyzers you can measure transmitter distortion frequency response and count squelch tones The HP 8903B also provides the audio tones to modulate the transmitter Audio Applications The HP 8903B Audio Analyzer and HP 8903E Distortion Analyzer make your audio measurements fast and easy The analyzers automatically tune and autorange for maximum accuracy and resolution Distortion frequency response ac and dc voltage measurements are only a single keystroke away With a built in low distortion audio source the HP 8903B is ideally suited to stimulus response appl
14. est factor up to 3 rms calibrated average detection or quasi peak detention TIME TO RETURN FIRST MEASUREMENT lt 1 5s MEASUREMENT RATE gt 2 5 readings per second 3 dB MEASUREMENT BANDWIDTH gt 500 kHz QUASI PEAK DETECTOR CHARACTERISTIC Meets CCIR 468 4 QUASI PEAK DETECTOR ACCURACY 20 Hz to 20 kHz 6 typically DCL level FULL RANGE DISPLAY 300 0 V 48 00 V 16 00 V 4 000 V OVER RANGE 33 except on 300 V range ACCURACY 1 0 of reading 600 mV to 300 V 6 mV V lt 600 mV Supplemental Characteristics TIME TO RETURN FIRST MEASUREMENT lt 1 5s MEASUREMENT RATE 3 readings per second Frequency Measurement MEASUREMENT RANGE 20 Hz to 150 kHz 20 Hz to 100 kHz in distortion and SINAD modes RESOLUTION 5 digits 0 01 Hz for input frequencies lt 100 Hz ACCURACY 0 004 1 digit SENSITIVITY 50 mV in distortion and SINAD modes 5 mV in ac level and signal to noise HP 8903B only modes Supplemental Characteristics MEASUREMENT RATE sameas measurement mode selected COUNTING TECHNIQUE reciprocal with 2 MHz timebase HP 8903B and HP 8903E Analyzer Specifications Standard Audio Filters 80 kHz Low pass Filter 30 kHz Low pass Filter y ao w a a D a oc 10 kHz 100 kHz Frequency 30 kHz LOW PASS FILTER 3 dB Cutoff Frequency 30 kHz 2 kHz Rolloff Third order Butterworth 18 dB per octav
15. ications Microprocessor control of source and analyzer allows the HP 8903B to perform swept measurements For applications where a separate source is used the HP 8903E is an ideal lower cost solution ATE Systems HP IB control of all measurement functions makes analyzers valuable tools for ATE applications These analyzers combine the power of a digital voltmeter frequency counter and distortion analyzer into one instrument Since these functions are all available at one input connector interfacing requirements hardware costs and software development time are reduced The HP 8903B also includes a low distortion programmable audio source UJ Versatile The HP 8903B Audio Analyzer and HP 8903D Distortion Analyzer provide unparalleled versatility and performance for audio measurements from 20 Hz to 100 kHz Both instruments combine the functionality of a high performance distortion analyzer frequency counter ac voltmeter dc voltmeter and SINAD meter into one compact package In addition the HP 8903B has a low distortion audio source which allows it to perform stimulus response measurements such as signal to noise ratio automatically with no additional equipment Simple For ease of use most measurements are made with one or two keystrokes Both analyzers automatically tune and autorange for maximum accuracy and resolution For quick identification of input signals the analyzers count and display the input frequency in all ac measure
16. if you wish to have any of the filters listed in the next column Each filter option ordered adds additional cost to the instrument FILTER OPTIONS Option Numbers Filters Filter Positions 400 Hz high pass CCITT weighting filter CCIR weighting filter C MESSAGE weighting filter CCIR ARM weighting filter A weighting filter i HEWLETT PACKARD Plug in Filter Ording Examples Here are two examples of how the plug in filters might be ordered First Example HP 8903B One Option 010 Total Explanation This HP 8903B has a 400 Hz high pass filter in the left slot and no filter in the right slot Second Example HP 8903E One Option 012 One Option 055 Total Explanation This HP 8903E has a CCIR weighting filter in the left slot and an A weighting filter in the right slot For more information about Hewlett Packard Test amp Measure ment products applications services and for a current sales office listing visit our web site http www hp com go tmdir You can also contact one of the following centers and ask for a test and measurement sales representative United States Hewlett Packard Company Test and Measurement Call Center PO Box 4026 Englewood CO 80155 4026 1 800 452 4844 Canada Hewlett Packard Canada Ltd 5150 Spectrum Way Mississauga Ontario L4W 5G1 905 206 4725 Europe Hewlett Packard European Marketing Centre P O Box 999 1180 AZ Amstelveen The Netherl
17. ment modes The HP 8903B can also measure distortion of one signal while generating another frequency because analyzer tuning and source frequency are independent Accurate For accurate measurement of complex waveforms and noise the analyzers use true rms detection Average rms calibrated and quasi peak detection are also available via front panel control Accurate distortion measurements can typically be made down to less than 90 dB 0 003 between 20 Hz and 20 kHz Over the same frequency range flatness measurements are possible to 0 05 dB 0 5 The analyzers precision reciprocal counters give you fast accurate characterizations of audio frequencies For example when counting a 1 kHz signal the analyz ers will be accurate within 14 Hz EES SSS_SSSSS_Sz_ _ Audio Application The analyzers have many features which make difficult audio measurements easy These include flexible data display formats balanced analyzer input plug in filters fully automatic notch filter tuning and for the HP 8903B convenient audio source control and swept measurements Complete control over display format ting gives you a choice between volts millivolts dBm into 600 ohms and watts for ac level measurements or percent and dB for distortion measurements Using the ratio key you can establish a reference in percent or dB and directly make frequency response and 3 dB band width measurements without computation Balanced Analyzer Input
18. os less than Filters for Transmitter and Receiver 25 dB As an extra aid in reading noisy signals the A ppl ications HP 8903B adds an analog SINAD meter which displays ratios less than 24 dB With two internal filter positions and six optional plug in filters to choose from you can tailor the analyzers to fit your applications The CCITT CCIR and C MES SAGE weighting filters meet international standards for receiver testing For transmitter testing a seven pole 400 Hz high pass filter is available to reject subaudible squelch signals Providing greater than 40 dB rejection of signals up to 250 Hz the analyzers 400 Hz high pass filter allows you to measure transmitter audio distor tion to 1 percent without disabling squelch signals The HP 8903B s analog SINAD meter helps smooth out noisy signals found in receiver testing ATE Systems Accurate Signal Detection In order to accurately characterize signals with high noise content as found in receiver SINAD measure ments true rms detection is required The analyzers employ true rms detection for all signals with crest fac tor less than three In addition average detection rms calibrated and quasi peak detection CCIR 468 4 are also available via front panel control MEASUREMENT E DEVEL DISTN AVG SINAD RMS uea You can choose between rms average or quasi peak detec tion Shown above HP 8903E front panel Generate and Count Tone Burs
19. ts Under HP IB control the analyzers use their reciprocal counters to count tone burst sequences Maximum count rate for the Rapid Frequency Count mode is six milliseconds per reading With the HP 8903B you can generate tone burst sequences Minimum tone duration is three milliseconds which is fast enough for such ap plications as unsquelching pagers Signal to Noise Ratio for Receivers Just as SINAD measurements are most often per formed on FM receivers signal to noise ratio measure ments are usually employed as a measure of signal quality on AM receivers The HP 8903B automatically makes signal to noise ratio measurements by monitor ing the ac level while turning its source on and off Like SINAD signal to noise mode in the HP 8903B uses dis play rounding and filtering to reduce the effects of noise on the measurement Simple but powerful programming combined with HP IB control of all major functions make the analyz ers valuable tools for the automatic test equipment en vironment All analyzer functions are available at one input connector reducing hardware and software de velopment time and costs Many ATE systems require automated measurements to determine the quality of audio signals The analyzers provide distortion and SINAD measurements with an acquisition time of less than 1 5s and a measurement rate of greater than two readings per second after locking Another application often found in ATE systems involves me
20. um peak input voltage any combination of ac and dc HP 8903B 425 volts peak applied differentially or between either input and ground HP 8903K 42 volts peak low side to ground 425 volts peak differentially or high side to ground CMRR gt 60 dB 20 Hz to 1 kHz V lt 2V gt 45 dB 20 Hz tol kHz gt 30 dB 20 Hz to 20 kHz Supplemental Characteristics ao oc oc oO 5 com 80 Az 200 Hz 500 Hz 2kHz 5 kHz BOkH2 20kHz 100 kHz Frequency ee CMRR from 20 Hz to 100 kHz with input voltage of volts General TEMPERATURE operating 0 C to 55 C storage 55 C to 75 C REMOTE OPERATION HP IB All functions except the line switch low terminal ground switches source output impedance switch HP 8903B only and the X10 and 10 increment keys HP 8903B only are remotely controllable The HP 8903E has many special functions which can only be accessed via HP IB commands HP IB COMPATIBILITY SH1 AHI T5 TEO L3 LEO SR1 RL1 PPO DC1 DT1 CO El POWER 100 120 220 or 240 V 5 10 48 66 Hz 100 or 120 V 5 10 48 440 Hz 100 VA maximum WEIGHT HP 8903B net 12 3 kg 27 lb shipping 16 4 kg 36 lb HP 8903E net 11 8 kg 26 1b shipping 15 9 kg 35 lb DIMENSION 146 mm H x 425 mm W x 462 mm D 5 75 x 16 8 x 18 2 in HP SYSTEM II SIZE 5 1 4 Hx 1 MW x 17D EMI Radiated interferenc
21. veral measurements and features which have been designed specifically for transceiver tests These include SINAD measurements optional plug in weighting filters for testing to CEPT EIA CCIR and Bell standards rms detection for accurate noise readings a reciprocal counter for measuring squelch tones and with the HP 8903B signal to noise ratio mea surements SINAD Designed for the Real World SINAD measurements which are one of the most com mon FM receiver tests must be made repeatedly when checking receiver sensitivity or adjacent channel selec tivity In order to smooth out the noisy signals found in receiver testing the analyzers SINAD mode employs extra filtering circuits These circuits have been opti mized for high speed more than two readings per sec ond and excellent repeatability The HP 8903B over comes the tendency of many automatic analyzers to be come unlocked in SINAD mode by tuning its notch filter to the source frequency Since it has no internal audio source the HP 8903E tunes its notch filter to the input frequency To make sure that the HP 8903E does not be come unlocked when measuring noisy signals a front panel notch hold key allows you to lock the filter to a given input frequency Optimized SINAD Display The HP 8903B is an integral part of HP s total solution for transceiver testing To reduce digit flicker the analyzers round off the dis play to the nearest 0 5 dB for SINAD rati
Download Pdf Manuals
Related Search