Keysight N777 C Series Programming Manual page 68

4 Measurement Operations & Settings
Response: None
Example: :sour0:wav:ref:disp
Affects: All N777xC tunable laser sources and DFB modules
Command: :SOURce0:WAVelength:SWEep:CHECkparams?
Syntax: :SOURce0:WAVelength:SWEep:CHECkparams?
Description: Returns whether the currently set sweep parameters (sweep mode, sweep start, stop, width, etc.) are consistent. If there is a
sweep configuration problem, the laser source is not able to pass a wavelength sweep.
Parameters: None
Response: A string with a detailed description of a configuration problem, or "0,OK" if the sweep os configured correctly. The responses
shown below are all the possible configuration problem strings:
Message
368,LambdaStop <=LambdaStart
369,sweepTime < min
370,sweepTime > max
371,triggerFreq > max
372,step < 0.1 pm
373,triggerNum > max
374,LambdaLogging = On AND Modulation
= On AND ModulationSource!
= CoherenceControl
375,LambdaLogging = On AND TriggerOut!
= StepFinished
376,Lambda logging in stepped mode
377,step not multiple of <x>
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Description
start wavelength must be smaller
than stop wavelength
the total time of the sweep is too
small
the total time of the sweep is too
large
the trigger frequency (calculated
from sweep speed divided by
sweep step) is too large
step size too small
the number of triggers exceeds
the allowed limit
The only allowed modulation
source with the lambda logging
function is coherence control.
lambda logging only works "Step
Finished" output trigger configuration
lambda logging can only be done in
continuous sweep mode
the step size must be a multiple of
the smallest possible step size
Keysight N777xC Series Tunable Laser Family Programming Guide