HP 8903B/E Audio Analyzer/Distortion Analyzer, 20 Hz to 100 kHz
Contents
1. HP 8903B 425 volts peak applied differentially or between either input and ground HP 8903E 42 volts peak low side to ground 425 volts peak differentially or high side to ground General Temperature Operating 0 C to 55 C storage 55 C to 75 C Weight HP 8903B Net 12 3 kg 27 lb shipping 16 4 kg 36 Ib HP 8903E Net 11 8 kg 26 lb shipping 15 9 kg 35 Ib Dimensions 146 mm H x 425 mm W x 462 mm D 5 75 x 16 8 x 18 2 in Ordering Information Analyzer Mainframes HP 8903B Audio Analyzer Option 001 Rear panel input and output Option 910 Provides additional operation calibration manual 08903 90079 Option 915 Add service manual 08903 90062 Option W30 Three 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 Three year return repair service Options for both HP 8903B and 8903E Option 907 Front handle kit Option 908 Rack flange kit Option 909 Rack flange kit with front handles Ordering Information Sey LP FILTER n ano Hz ccnT nwie ASS i PASS WEIGHTING Wicana a 30 kHz BO kHz Internal Plug In Filter Options Two band limiting low pass filters are standard Optional high pass and weighting filters can be fitted to match your req2. 1 dB 20 Hz to 20 kHz Residual Distortion and Noise the higher of 80 kHz BW 80 dB or 15 uV 20 Hz to 20 kHz 500 kHz BW 70 dB or 45 uV 20 Hz to 50 kHz 65 dB or 45 uV 50 kHz to 100 kHz SINAD Fundamental Frequency Range 20 Hz to 100 kHz Residual Distortion and Noise Same as listed under distortion Accuracy 1 dB 20 Hz to 20 kHz AC Level Full Range Display 300 0 V 30 00 V 3 000 V 0 3000 V 30 00 mV 3 000 mV 0 3000 mV Accuracy rms and average detection 2 50 mV to 300 V 20 Hz to 20 kHz DC Level Full Range Display 300 0 V 48 00 V 16 00 V 4 000 V Accuracy 1 0 of reading 600 mV to 300 V 6 mV V lt 600 mV Frequency Measurement Measurement Range 20 Hz to 150 kHz 20 Hz to 100 kHz in distortion and SINAD modes Accuracy 0 004 plus one digit Standard Audio Filters 30 kHz Low Pass Filter 80 kHz Low Pass Filter HP 8903B and HP 8903E Analyzer Specifications continued Plug In Audio Filters 400 Hz High Pass Filter CCITT Weighting Filter CCITT rec P53 CCIR Weighting Filter CCIR rec 468 2 C Message Weighting Filter per BSTM 41004 CCIR ARM Weighting Filter CCIR rec 468 2 average responding meter Dolby Labs Bulletin No 19 4 A Weighting Filter IEC rec 179 and ANSI S1 4 type one sound level meter Analyzer Input Input Type Balanced full differential Maximum Input Maximum peak input voltage any combination of ac and de
3. This literature was published years prior to the establishment of Agilent Technologies as a company independent from Hewlett Packard and describes products or services now available through Agilent It may also refer to products services no longer supported by Agilent We regret any inconvenience caused by obsolete information For the latest information on Agilent s test and measurement products go to www agilent com find products i Agilent Technologies Or in the U S call Agilent Technologies at 1 800 452 4844 8am 8pm EST t Innovating the HP Way L HEWLETT PACKARD Expanding Possibilities CHP 8903B E Audio Analyzer Distortion Analyzer 20 Hz to 100 kHz 1000 7 9 179 TE mmm g see 7 BE Versatile The HP 8903B Audio Analyzer and HP 8903E Distor The analyzers precision reciprocal counters give tion Analyzer provide unparalleled versatility and you fast accurate characterizations of audio performance for audio measurements from 20 Hz to frequencies For example when counting a 1 kHz 100 kHz Both instruments combine the functionality signal the analyzers will be accurate within 0 14 Hz of a high performance distortion analyzer frequency counter ac voltmeter dc voltmeter and SINAD meter into one compact package In addition the Simple HP 8903B has a low distortion audio source which For ease of use most measurements are made with allows it to perform stimulus response meas
4. ect able 30 kHz and 80 kHz low pass filters to reject unwanted out of band signals and noise Filters 80 kHz Low Pass 30 kHz Low Pass 400 Hz High Pass CCITT Weighting Filter CCIR Weighting Filter C Message Weighting Filter CCIR ARM Weighting Filter A Weighting Filter 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 performance and display the result Typical time to return the first distortion measurement is 1 5 seconds with a measurement rate of two readings per second thereafter Residual distortion and noise for the analyzer sections are 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 automatically 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 connecting the device and setting the required source level you need only to enter the sweep start and stop frequencies and then press the sweep key Automatic Signal to Noise Measurements For signal to noise measurements t
5. he HP 8903B monitors the ac input while turning the source on and off and displaying the ratio With optional plug in filters you can perform weighted signal to noise measurements easily accurately and in real time Transmitter and Receiver Tests The analyzers have several measurements and features which have been designed specifically for transceiver tests These include SINAD measure ments optional plug in weighting filters for testing to CEPT EIA CCIR and Bell standards rms detec tion for accurate noise readings a reciprocal counter for measuring squelch tones and with the HP 8903B signal to noise ratio measurements SINAD Designed for the Real World SINAD measurements which are one of the most common FM receiver tests must be made repeat edly when checking receiver sensitivity or adja cent channel selectivity In order to smooth out the noisy signals found in receiver testing the analyz ers SINAD mode employs extra filtering circuits These circuits have been optimized for high speed more than two readings per second and excellent repeatability The HP 8903B overcomes the ten dency of many automatic analyzers to become 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 become unlocked when measuring noisy signals a front panel notch hold key allows
6. ing V gt 50 mV 20 Hz to 20 kHz the analyzers accurately characterize these small ac signals Flexible ATE Source The HP 8903B has enhanced ATE capabilities with its internal low distortion source Rapid source programming mode enables the internal oscillator to be directly programmed through HP IB with five bytes Additionally 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 instruments in your ATE system In the 50 ohm position the HP 8903B delivers 17 dBm into a 600 ohm load Condensed Specifications HP 8903B System Specifications HP 8903B only source and analyzer combined Distortion Residual Distortion and Noise the higher of 80 kHz BW 80 dB or 17 UV 20 Hz to 20 kHz 500 kHz BW 70 dB or 50 uV 20 Hz to 50 kHz 65 dB or 50 uV 50 kHz to 100 kHz HP 8903B Source Specifications HP 8903B only Frequency Range 20 Hz to 100 kHz Accuracy 0 3 of setting Output Level Range 0 6 mV to 6 V open circuit Accuracy 2 of setting 60 mV to 6 V 20 Hz to 50 kHz Flatness 1 kHz reference 0 7 0 06 dB 20 Hz to 20 kHz Distortion and Noise the higher of 80 kHz BW 80 dB or 15 uV 20 Hz to 20 kHz 500 kHz BW 70 dB or 38 uV 20 Hz to 50 kHz 65 dB or 38 uV 50 kHz to 100 kHz HP 8903B and HP 8903E Analyzer Specifications Distortion Fundamental Frequency Range 20 Hz to 100 kHz Accuracy
7. mum 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 applications as unsquelching pagers Signal to Noise Ratio for Receivers Just as SINAD measurements are most often performed on FM receivers signal to noise ratio measurements are usually employed as a measure of signal quality on AM receivers The HP 8903B automatically makes signal to noise ratio measure ments by monitoring the ac level while turning its source on and off Like SINAD signal to noise mode in the HP 8903B uses display 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 analyzers valuable tools for the automatic test equipment environment All analyzer function are available at one input connector reducing hardware and software development time and costs Many ATE systems require automated measurements to determine the quality of audio signals The analyz ers provide distortion and SINAD measurements with an acquisition time of less than 1 5 seconds and a measurement rate of greater than two reading per second after locking Another application often found in ATE systems involves measuring low level ac signals With a full range ac level display of 0 3000 mV and an accuracy of 2 of read
8. n of the instrument or software or firmware will be uninterrupted or error free Limitation Of Warranty The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by buyer buyer supplied software or interfacing unauthorized modification or misuse operation outside of the environmental specifications for the product or improper site preparation or maintenance No other warranty is expressed or implied Hewlett Packard specifically disclaims the implied warranties of merchantability and fitness for a particular purpose HEWLETT PACKARD G Expanding Possibilities For more information about Hewlett Packard test amp measurement products applications and 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 You can also contact one of the follow ing centers and ask for a test and measurement sales representative United States Hewlett Packard Company Test and Measurement Call Center P O Box 4026 Englewood CO 80155 4026 tel 1 800 452 4844 Canada Hewlett Packard Canada Ltd 5150 Spectrum Way Mississauga Ontario L4W 5G1 tel 905 206 4725 Europe Hewlett Packard European Marketing Centre P O Box 999 1180 AZ Amstelveen The Netherlands tel 31 20 547 9900 Japan Hewlett Packard Japan Ltd Meas
9. rements 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 formatting 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 with out computation Balanced Analyzer Input In the quest for higher output power many audio amplifiers use bridged output stages Such amplifi ers can be difficult to characterize because their outputs cannot be grounded To test these devices the usual approach has been to use a balanced calibrated isolation transformer connected to an analyzer with an unbalanced 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 Choose the Filters for Your Applications Internal plug in filters simplify your audio measure ments by providing weighting networks required by international 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 sel
10. uirements Both the HP 8903B and 8903E have two plug in filter positions which can be loaded with any of six optional filters The standard HP 8903B and 8903E come with no plug in filters You must order the appropri ate filter options if you wish to have any of the filters listed below Each filter option ordered adds additional cost to the instrument Filter Options Option Numbers Filter Positions Filters 400 Hz High pass CCITT weighting filter CCIR weighting filter C Message weighting filter CCIR ARM weighting filter A weighting filter Related HP 8903B Audio Analyzer HP 8903E Distortion Analyzer Literature 5968 1390E 5968 1389EUS Technical Specifications Price List Warranty Information This Hewlett Packard instrument product is warranted against defects in material and workmanship for a period of one year from date of shipment During the warranty period Hewlett Packard Company will at its option either repair or replace products which prove to be defective For warranty service or repair this product must be returned to a service facility designated by HP Buyer shall prepay shipping charges to HP and HP shall pay shipping charges duties and taxes for products returned to HP from another country HP warrants that its software and firmware designated by HP for use with an instrument will execute its programming instructions when properly installed on that instrument HP does not warrant that the operatio
11. ure one or two keystrokes Both analyzers automatically ments such as signal to noise ratio automatically tune and autorange for maximum accuracy and with no additional equipment resolution For quick identification of input signals the analyzers count and display the input frequency in all ac measurement modes The HP 8903B can Accurate also measure distortion of one signal while generat For accurate measurement of complex waveforms ing another frequency because analyzer tuning and and noise the analyzers use true rms detection source frequency are independent 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 Features Measurements HP8903B HP8903E Audio Source 50 600 Q Output Impedance Fully Programmable v cam v Balanced Input Frequency Counter Distortion SINAD AC Volts DC Volts RMS Average Quasi Peak Detection Plug In Filters Distortion Level Signal To Noise Sweep 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 ke
12. urement Assistance Center 9 1 Takakura Cho Hachioji Shi Tokyo 192 8510 Japan tel 81 426 56 7832 fax 81 426 56 7840 Latin America Hewlett Packard Latin American Region Headquarters 5200 Blue Lagoon Drive 9th Floor Miami Florida 33126 U S A tel 805 267 4245 tel 805 267 4220 fax 305 267 4288 Australia New Zealand Hewlett Packard Australia Ltd 31 41 Joseph Street Blackburn Victoria 3130 Australia tel 1 800 629 485 Australia tel 0800 738 378 New Zealand fax 61 3 9210 5489 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 fax 852 2506 9285 1982 Hewlett Packard Co Data subject to change Printed in U S A 10 98 5968 1388E
13. you to lock the filter to a given input frequency Optimized SINAD Display To reduce digit flicker the analyzers round off the display to the nearest 0 5 dB for SINAD ratios less than 25 dB As an extra aid in reading noisy signals the HP 8903B adds an analog SINAD meter which displays rations less than 24 dB Filters for Transmitter and Receiver Applications 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 message weighting filters meet international standard for receiver testing For transmitter testing a seven pole 400 Hz high pass filter is available to reject sub audible 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 distortion to 1 without disabling squelch signals ATE Systems Accurate Signal Detection In order to accurately characterize signals with high noise content as found in receiver SINAD measurements true rms detection is required The analyzers employ true rms detection for all signals with crest factor less that three In addition aver age detection rms calibrated and quasi peak detection CCIR 468 4 are also available via front panel control Generate and Count Tone Bursts Under HP IB control the analyzers use their reciprocal counters to count tone burst sequences Maxi
14. ystroke away With a built in low distortion audio source the HP 8903B is ideally suited to stimulus response applications 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 Transceiver Tests Both the HP 8903B and HP 8903E are 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 ATE Systems HP IB control of all measurement functions makes the analyzers valuable tools for ATE applications These analyzers combine the power of a digital voltmeter frequency counter and distortion ana lyzer into one instrument Since these functions are all available at one input connector interfacing requirements hardware costs and software develop ment time are reduced The HP 8903B also includes a low distortion programmable audio source Audio Applications The analyzers have many features which make difficult audio measu
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