Stanford Research Systems SR865A Operation Manual page 144

126 Programming
FAUT
The FAUT
same as pressing the
FFTMAXSPAN?
The FFTMAXSPAN?
current FFT source and lock-in configuration (time constant and reference frequency).
Example
FFTMAXSPAN?
FFTSPAN(?) { x }
The
FFTSPAN x
the maximum allowed span (as returned by
the nearest allowed span (max span divided by powers of 2).
Example
FFTSPAN 305
FFTSPAN?
FFTA(?) { AVG1 | AVG3 | AVG10 | AVG30 | AVG100 | i }
The FFTA i
(i=4).
Example
FFTA AVG3
FFTA 1
FFTA?
FFTL(?) { OFF | ON | i }
The
FFTL i
Example
FFTL OFF
FFTL 0
FFTL?
FCRW(?) { LIne | NARrow | WIde | i }
The
FCRW i
Example
FCRW NAR
FCRW 1
FCRW?
SR865A DSP Lock-in Amplifier
command performs an Auto Scale on the FFT display. This command is the
button in the FFT vertical scale palette.
query returns the maximum allowed FFT span (Hz/div) for the
Returns the maximum allowed FFT span in Hz/div
command sets the FFT span to x Hz/div. The value of x may not exceed
Set the FFT span to 305.2 Hz/div
Returns the FFT span in Hz/div
command sets the FFT averaging to 1 (i=0), 3 (i=1), 10 (i=2), 30 (i=3) or 100
Set the FFT averaging to 3
Returns the FFT averaging i
command pauses (i=0) or resumes (i=1) the FFT graphing.
Pause the FFT graph
Returns the FFT graphing i
command sets the cursor width to line (i=0), narrow (i=1) or wide (i=2).
Set the cursor to narrow
Returns the cursor width i
FFTMAXSPAN? ). The FFT span will be set to
Chapter 4