SRS Labs manual SR785 Features

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SR785 Features

Instrument Modes

FFT, Time/Histogram, Correlation, Octave, Swept-Sine, Order

Tracking

Frequency Domain Measurements

Frequency Response, Linear Spectrum, Cross Spectrum, Power Spectrum, Coherence, Power Spectral Density

Time Domain Measurements

Time Record, Cross Correlation, Auto Correlation, Orbit

Amplitude Domain Measurements

Histogram, PDF, CDF

FFT Resolution

100, 200, 400, 800 lines

Views

Linear Magnitude, Log Magnitude, dB Magnitude, Magnitude Squared, Real Part, Imaginary Part, Phase, Unwrapped Phase, Nichols, Nyquist, Polar

Units

V, V2, V2/Hz, V/Hz, meters, meters/sec, meters/sec2, inches, inches/sec, inches/sec2, mils, g, kg, lbs., N, dynes, pascals, bars, SPL, user-defined engineering units (EUs)

Displays

Single, Dual, Front/Back overlay, Waterfall with Skew, Zoom and Pan, Grid On/Off

Marker Functions

Trace Marker, Dual Trace Linked Marker, Absolute and Relative Marker, Peak Find, Harmonic Marker, Band and Sideband Marker, Waterfall Marker, Frequency-Damping Marker

Averaging

RMS, Vector, Peak Hold, Linear, Exponential, Equal Confidence

(Octave), Preview Time Record, % Overlap Averaging, Overload

Reject

Triggering

Continuous, Internal, External (Analog or TTL), Source,

Auto/Manual Arming, GPIB, RPM Step, 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 Hold

Analysis

Harmonic, Band, Sideband, THD, THD + N, Limit Test with Pass/Fail, Data Table, Exceedance, Statistics, Curve Fit and Synthesis

Time Capture

Capture Time Data for later analysis (FFT or Octave). Up to 2 Msamples (8 Msamples optional) of data can be saved.

Storage

3.5”, 1.44 Mbyte, DOS formatted disk. Save data, setups and hard copy data.

Hard Copy and Interfaces

Print to Dot Matrix or PCL (LaserJet and DeskJet) printers. Plot to HP-GL or Postscript plotters. Print/Plot on-line (RS-232 serial, Centronics parallel or IEEE-488) or to disk file. EPS, GIF, PCX graphic formats also available for disk storage.

Data Conversion Utility

Data, waterfall and capture files can be converted to ASCII. Data files can also be converted to 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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Contents SR785 Two Channel Dynamic Signal Analyzer $11,950 U.S. list SR785 Two Channel Dynamic Signal AnalyzerFast Responsive Marker Averaging FFT Spectrum AnalysisOrder Tracking Swept-Sine Measurements Octave AnalysisUnit Conversion Time/Histogram Time CaptureSource Waterfall User MathAnalysis Output Curve Fit and SynthesisData Conversion Utilities Help DataViewerInside the SR785 Right ChoiceSR785 Specifications Source Output Transient CaptureSine-Source Two Tone SourceSR785 Features Ordering Information SpecificationsVDC Converter MobileCART

SR785 specifications

The SRS Labs SR785 is a powerful and versatile audio analysis tool designed for audio engineers, researchers, and manufacturers. This instrument is renowned for its ability to perform a wide array of measurements, making it an essential asset for anyone involved in audio testing and development. With its cutting-edge features and technologies, the SR785 stands out in the competitive field of audio analysis.

One of the main features of the SR785 is its dual-channel capability, which allows users to analyze both input and output signals simultaneously. This is particularly useful for applications such as loudspeaker testing, where comparing the input signal against the output can provide valuable insights into the performance and fidelity of audio systems. The device supports a wide dynamic range and can capture audio signals from an impressive range of frequencies, ensuring accurate representations of even the most nuanced sounds.

The SR785 employs state-of-the-art Fast Fourier Transform (FFT) technology, enabling users to switch between time-domain and frequency-domain analysis with ease. This flexibility allows engineers to tailor their measurements based on specific requirements, whether they are evaluating distortion levels, frequency response, or impulse response. The instrument’s high-resolution display provides clear visual representations of the analyzed data, making it easier to identify trends and anomalies.

Another notable feature of the SR785 is its built-in automation capabilities. This technology allows for automated testing sequences, streamlining the analysis process and reducing the potential for human error. Users can pre-program a series of tests to run automatically, ensuring consistency in measurements and saving valuable time during testing and analysis.

Additionally, the SR785 offers extensive data storage options, allowing users to save measurement results for future reference or comparison. This is particularly beneficial for long-term studies or for manufacturers conducting quality control checks on production lines. The device is also equipped with a range of connectivity options, including USB and GPIB, facilitating easy integration into existing test setups and enhancing its versatility.

The combination of advanced features, robust technologies, and user-friendly design makes the SRS Labs SR785 a top choice for audio professionals seeking a reliable and efficient audio analysis solution. Whether for research, development, or quality assurance, the SR785 delivers precise and actionable insights that drive sound performance to new heights.