The SR780 Dynamic Signal Analyzer combines high performance and low cost in a

Spectrum Analysis

The SR780 delivers true two-channel, 102.4 kHz FFT performance. Its fast

The SR780's unique architecture lets the two displays function independently. You can choose separate frequency spans, starting frequencies, number of FFT lines, or averaging modes for each display. So it's easy look at a wideband display and zoom in on a specific feature simultaneously. The SR780 lets you select from two sampling rates: 256 kHz or 262 kHz, so frequency spans come out in either a binary

Flexible Averaging

Several averaging choices are provided. RMS averaging reduces signal fluctuations, while vector averaging minimizes noise from synchronous signals. You can choose linear averaging (stable averaging) for fixed signals, or exponential averaging to track drifting features. Because the SR780's 102.4 kHz

Transducer Units

Automatic unit conversion makes translating accelerometer data easy. You can enter accelerometer conversions directly in V/EU, EU/V or

Octave Analysis

Real-time octave analysis at frequencies up to

Swept-Sine Analysis

Swept-sine analysis is used for measurements involving high dynamic range or wide frequency intervals, and is also a standard feature of the SR780.

User Math

User-defined math functions are available in all measurement groups. Equations are created from time or frequency data, stored files, constants, or a rich array of supplied operations including the arithmetic functions, FFT, inverse FFT, jΩ, d/dΩ, exp, ln *x* and many others. Unlike many analyzers, the SR780's measurement rate isn't reduced when user math is selected. For instance, the function

Source

Six source types are available: low distortion

Arbitrary waveform capability is standard on the SR780. The arbitrary source can be used to playback a section of a captured waveform, play a selected FFT time record or upload a custom waveform.

Capture

The SR780 comes standard with 2 Msamples of standard capture memory. Waveforms can be captured at 262 kHz or any sub-multiple of 262 kHz, allowing you to select the sample rate and capture length that's right for your data. Once captured, any portion of the signal can be played back in FFT or Octave mode. The convenient AutoPan feature lets you display the measurement results synchronously with the corresponding portion of the capture buffer to easily identify important features. An optional memory expansion module lets you extend the SR780's capture depth to

Waterfall

All Octave and FFT Measurements can be stored in the SR780's ^{th} time record for FFT measurements, or you can select a storage interval in seconds (down to 4 ms) for octave measurements. While displaying waterfalls, you can adjust the skew angle to reveal important features, or change the baseline threshold to eliminate

Analysis

The SR780 includes a wide variety of built-in analysis features. Marker analysis lets you use the marker to easily measure the power contained in the harmonics, sidebands, or within a given band of frequencies. THD, THD+N, sideband power relative to carrier, and total integrated power are calculated in real time and displayed on the screen. Marker statistics quickly calculate the maximum, minimum, mean and standard deviation of data at any point in the display.

A data table feature lets you display up to 100 selected data points in tabular format. Limit tables allow you to define up to 100 upper and lower limit segments in each display for

Output

The SR780's built-in USB drive, computer interfaces (GPIB and

Measurements - FFT Group

FFT, Time Record, Windowed Time, Time Capture, Transfer Function, Cross Spectrum, Coherence,

Measurements - Octave Analysis Group

1/1, 1/3, 1/12 Octave, Time Capture, User Math, L_{eq}, Impulse, Total Power

Measurements - Swept-Sine Group

Spectrum, Transfer Function, Cross Spectrum, User Math

FFT Resolution

100, 200, 400, 800 lines

Views

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

Units

V, V^{2}, V^{2}/Hz, V/√Hz, meters, inches, mils, g, kg, lbs., N, dynes, pascals, bars, SPL,

Displays

Single, Dual, Waterfall with Skew, Zoom and Pan

Averaging

RMS, Vector, Peak Hold, Linear, Exponential, Equal Confidence (Octave), Preview Time Record

Triggering

Continuous, Internal, External (Analog or TTL), Source, Auto/Manual Arming

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 Math

+, -, ×, /, Conjugate, Magnitude/Phase, Real/Imaginary, Sqrt, FFT, Inverse FFT, jΩ, Log, Exp, *x**x*/*x*-1

Analysis

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

Time Capture

Captures 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 and setups.

Hard Copy and Interfaces

Print to dot matrix or PCL (LaserJet and DeskJet) printers. Plot to