Stanford Research Systems SR785, Operating Manual And Programming Reference

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Noise Source Menu 4-77
SR785 Dynamic Signal Analyzer
The noise output is continuous for Octave Analysis.
Command: CSRC (?) {i}
Source Period
Set the Burst Period for noise in Octave group [4 ms..1ks].
In Octave and Order group, the burst period is not linked to a display but is specified in
time by the Source Period. The burst output is present for a Burst percentage of the
Source Period.
Triggering
When the burst percentage is less than 100%, the burst noise source is triggered by
External triggers. Set the Trigd Source Mode to trigger once (1-Shot) or with every
trigger (Continuous). In the 1-Shot case, the burst source only triggers on the first trigger
after [Start/Reset]. This same trigger starts the measurement (and waterfall). In the
Continuous case, the source triggers on every trigger, with a minimum trigger period set
by the Source Period.
Source trigger outputs a noise burst every source period.
Free Run Trigger Mode outputs a noise burst every source period.
Do not use Ch1 or Ch2 input trigger since the output will not start until a trigger is
received.
Command: NPER (?) {x}