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The SRS DataViewer Windows utility enables you to
view SR785 data files graphically and save them in
different formats.

DataViewer

The SRS DataViewer is a Windows 95 program that allows

you to quickly upload SR785 files into a graphical 

environment, perform simple editing and cut and paste into

other applications. You can add pointers and text, change

scaling, and perform simple math operations. Graphs can be

saved in PCX, BMP or GIF formats.  

Inside the SR785

The computational heart of the SR785 is an Analog Devices'

ADSP21020 32-bit floating point digital signal processor

which delivers a true 102.4 kHz real-time bandwidth on both

channels simultaneously – there's never a need to trade 

bandwidth for number of channels. Two precision 16-bit

ADCs provide 90 dB dynamic range in FFT mode and 145 dB

dynamic range in swept-sine mode – enough for the most

demanding applications. With up to 800 lines of spectral 

resolution, the SR785 allows you to zoom in on any portion of

the 476 mHz to 102.4 kHz range. 

The Right Choice

The SR785 Two Channel Dynamic Signal Analyzer offers

more useful features and superior performance than 

competitive analyzers and is priced considerably lower. For

more details on the SR785 and our other FFT analyzers, call

us at (408)744-9040, or visit our web site at www.srsys.com.

Help

Full, context sensitive help screens for all SR785 features

means you will rarely have to refer to the user's manual.

Hypertext links let you quickly switch between related help

pages or instantly reference the remote command correspond-

ing to any function. Use the help index to quickly locate 

information on any topic, jump to the on-line troubleshooting

guide, browse a complete listing of the SR785's specifica-

tions, or examine a comprehensive description of the SR785's

remote commands ... all from the front panel.

Summary of Contents for SR785

Page 1: ...SR785 Two Channel Dynamic Signal Analyzer SRS STANFORD RESEARCH SYSTEMS ...

Page 2: ...on both channels 90 dB dynamic range 16 bit 102 4 kHz real time bandwidth 0 2 dB accuracy 0 05 dB channel match 100 200 400 800 lines of frequency resolution Source type low distortion 80 dBc sine and two tone swept sine white and pink noise burst noise chirp burst and arbitrary 3 5 DOS 1 44 Mbyte Disk Drive Stores instrument setups time capture data water fall data trace data data tables limit ta...

Page 3: ...e input sensitivity Built in ICP power supply for accelerometers Switchable analog A weighting filters Engineering units On Line Help Locate information on any topic browse specifications examine remote commands all from the front panel User Math Build powerful custom measurements by directly entering equations PC XT Keyboard Input Enter text and annotations quickly and easily Standard Measurement...

Page 4: ...a single channel analyzer with its own span center frequency resolution and averaging Bottom display shows a wideband FFT while the top display shows a narrowband FFT of the same signal The sideband marker has been selected for calculation of the total sideband power This allows you to view a wideband spectrum and simultaneously zoom in on spectral details The same advanced architecture provides s...

Page 5: ...t frequency orders rather than absolute frequency Combined with a waterfall plot the SR785 provides a complete history or order map of your data as a function of time or RPM Using the slice feature the ampli tude profile of specific orders in the map can be analyzed In tracked order mode the intensity of individual orders vs RPM is measured Unlike other analyzers there s no need to track a limited...

Page 6: ...s filter response Top display shows magnitude with an expanded view of the passband response while bottom display shows the phase response Octave Analysis Real time 1 1 1 3 1 12 octave analysis at frequencies up to 40 kHz single channel or 20 kHz 2 channel is a standard feature of the SR785 Octave analysis is fully compliant with ANSI S1 11 1986 Order 3 type 1 D and IEC 225 1966 Switchable analog ...

Page 7: ...irps and arbitrary waveforms The chirp and noise sources can be bursted to provide activity over a selected portion of the time record for FFT measurements or to provide impulse noise for acoustic measurements The digitally synthesized source produces any portion of the signal can be played back in any of the SR785 s measurement groups except swept sine The convenient Auto Pan feature lets you dis...

Page 8: ...er are calculated in real time and displayed on the screen The front back display feature allows you to display live data from both signal inputs on one graph You can also simultaneously display saved traces and live data The peak find marker allows you to quickly locate frequency peaks with the click of a button The marker statistics feature calculates the maximum minimum mean and standard deviat...

Page 9: ...is programs SR785 Files can also be converted to MAT file format for use with MATLAB Conversion from external file types is also supported Both HP SDF and SR780 files can be converted to SR785 format Curve Fit and Synthesis The SR785 has a standard 20 pole 20 zero curve fitter that can fit frequency domain data from both the FFT and swept sine measurement groups Curve models can be displayed in po...

Page 10: ...range in swept sine mode enough for the most demanding applications With up to 800 lines of spectral resolution the SR785 allows you to zoom in on any portion of the 476 mHz to 102 4 kHz range The Right Choice The SR785 Two Channel Dynamic Signal Analyzer offers more useful features and superior performance than competitive analyzers and is priced considerably lower For more details on the SR785 a...

Page 11: ... cosine wave at the center of the time record For Uniform Force and Exponential windows phase is relative to a cosine wave at the beginning of the time record Cross Channel 0 5 deg dc to 51 2 kHz 1 0 deg dc to 102 4 kHz frequency response measurement both inputs on the same input range vector averaged Signal Inputs Number of Inputs 2 Full Scale Input Range 50 dBV 3 16 mVpk to 34 dBV 50 Vpk in 2 dB...

Page 12: ...re Mode Continuous real time data recording to memory Maximum Rate 262 144 samples sec for both inputs Max Capture Length 2 Msamples single input 8 Msamples with optional memory Octave Analysis Standards Conforms to ANSI standard S1 11 1986 Order 3 Type 1 D Frequency Range Band centers Single Channel 1 1 Octave 0 125 Hz 32 kHz 1 3 Octaves 0 100 Hz 40 kHz 1 12 Octaves 0 091 Hz 12 34 kHz Two Channel...

Page 13: ...ep Time Step Pre Post Trigger Delay Source Outputs Sine Two Tone Swept Sine White Pink Noise Burst Noise Chirp Burst Chirp and Arbitrary Windows Hanning Blackman Harris Flat Top Kaiser Force Exponential User Defined T 2 T 4 T 2 Uniform User Math Conjugate Magnitude Phase Real Imaginary Sqrt FFT Inverse FFT jω Log Exp d dx Group Delay A B C Weighting x x 1 Trace 1 4 Vector Average RMS Average Peak ...

Page 14: ...O780M1 8 Msample RAM call for pricing Option O78012V 12 VDC 115 VAC Converter 295 CT100 MobileCart 495 MobileCART The SRS CT100 MobileCART makes the SR785 truly portable Its rugged construction and full rack capacity will free up your valuable work space and allow you to take the SR785 wherever you need to go Specifications Tray Size 17 x 22 tray accommodates one full width rack mount instrument M...

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