Stanford Research Systems SR780, Operating Manual And Programming Reference

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SR780 Network Signal Analyzer
Specifications
Specifications apply after 30 minutes of warm-up and within 2
hours of last auto-offset. All specifications are with 400 line
FFT resolution and anti-alias filters enabled unless stated
otherwise.
Frequency
Range 102.4 kHz or 100 kHz (both displays have the same range).
FFT Spans 195.3 mHz to 102.4 kHz or 191 mHz to 100 kHz.
The 2 displays can have different spans and start frequencies.
FFT Resolution 100, 200, 400 or 800 lines
Real Time Bandwidth 102.4 kHz (highest FFT span with continuous data
acquisition and averaging on both inputs).
Accuracy 25 ppm from 20
°
to 40
°
C
FFT Dynamic Range
Dynamic Range -90 dBfs typical, -80 dBfs guaranteed (FFT and Octave),
145 dB (Swept Sine).
Includes spurs, harmonic and intermodulation distortion and
alias products. Excludes alias responses at extremes of span.
Harmonic Distortion <-80 dB (Single tone in band).
Intermodulation Distortion <-80 dB (Two tones in band, each <- 6.02 dBfs).
Spurious <-80
dBfs
Alias Responses <-80 dBfs (Single tone outside of span, < 0 dBfs, < 1 Mhz).
Full Span FFT Noise Floor -100 dBfs typical (Input grounded, Input Range > -30 dBV,
Hanning window, 64 RMS averages).
Residual DC Response < -30 dBfs (FFT with Auto Cal On).
Amplitude Accuracy
Single Channel ± 0.2 dB (excluding windowing effects).
Cross Channel ± 0.05 dB (dc to 102.4 kHz)
(Transfer Function measurement, both inputs on the same
Input Range, RMS averaged).
Phase Accuracy
Single Channel ± 3.0 deg relative to External TTL trigger.
(-50 dBfs to 0 dBfs, freq < 10.24 kHz)
(Center of frequency bin, DC coupled)
For Uniform, Blackman-Harris, Hanning, Flattop
and Kaiser windows, phase is relative to a cosine
wave at the center of the time record.
For 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)
(Transfer Function measurement, both inputs on the same
Input Range, Vector averaged.)