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Summary of Contents for Stanford Research Systems SR785
- Page 1 STANFORD RESEARCH SYSTEMS SR785 Two Channel Dynamic Signal Analyzer...
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Page 2: Specifications
SR785 Two Channel Dynamic Signal Analyzer $11,950 (U.S. list) Features FFT, Correlation and Order Tracking Measurements ANSI Standard 1/1, 1/3, 1/12 Octave Analysis Swept-Sine Mode (145 dB dynamic range) 20-pole/20-zero Curve Fit and Synthesis Time/Histogram Mode Windows95 DataViewer ¨ Output to SDF... - Page 3 Standard Measurement Modes • FFT • Swept-Sine • Octave • TIme/Histogram • Order Tracking • Time Capture PC (XT) Keyboard Input Enter text and annotations quickly and easily. Fast Responsive Marker • Find Max/Min or track peaks • THD, THD + N •...
- Page 4 Both linear and exponential averaging are provided for each mode. The SR785 is so fast, there's no need for a separate "fast averaging" mode. Averaging is always fast, and the display update rate is never sacrificed to increase the averaging rate.
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Page 5: Order Tracking
1000 averages take exactly 4 seconds, during which the SR785 still operates at its maximum display rate. For impact testing, the average preview feature allows each time record or spectrum to be accepted or rejected before adding it to the measurement. -
Page 6: 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. -
Page 7: Unit Conversion
Unit Conversion Automatic unit conversion makes translating transducer data easy. Enter your transducer conversion directly in V/EU, EU/V or dB (1V/EU). The SR785 will display the result in units of meters, inches, m/sec , in/sec , m/s, in/s, mil, g, kg, lbs., N, dynes, pascals or bars. - Page 8 FFT, octave and order tracking measurements can be stored in the SR785's waterfall buffer memory. You can choose to save all measurements and averaging modes or just the current measurement to conserve memory. Waterfall traces can be stored every n time records for FFT and order tracking measurements.
- Page 9 Lower trace shows curve fit to a portion of the data. 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 pole/zero, pole/residue and polynomial formats.
- Page 10 – 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...
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Page 11: Measurement Groups
SR785 Specifications Specifications apply after 30 minutes of warm-up and within two hours of last auto-offset. All specifications are with 400 line FFT resolution and anti-alias filters enabled unless stated otherwise. Measurement Groups Standard Groups FFT analysis, Correlation, Time Histogram, Swept Sine... - Page 12 Transient Capture 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...
- Page 13 Universal File Format, SDF format or MATLAB MAT-File Format. SDF and SR780 files can be converted to SR785 format. DataViewer Windows 95 based graphics program for viewing SR785 files. Graphs can be pasted to the clipboard or saved in PCX, BMP or GIF formats.
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Page 14: Ordering Information
MobileCart ......$495 12 VDC Converter Designed to power the SR785 in the field when AC power is not available. Specifications...
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