68 Keysight N777xC Series Tunable Laser Family Programming Guide
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 Description
368,LambdaStop <=LambdaStart start wavelength must be smaller
than stop wavelength
369,sweepTime < min the total time of the sweep is too
small
370,sweepTime > max the total time of the sweep is too
large
371,triggerFreq > max the trigger frequency (calculated
from sweep speed divided by
sweep step) is too large
372,step < 0.1 pm step size too small
373,triggerNum > max the number of triggers exceeds
the allowed limit
374,LambdaLogging = On AND Modulation
= On AND ModulationSource!
= CoherenceControl
The only allowed modulation
source with the lambda logging
function is coherence control.
375,LambdaLogging = On AND TriggerOut!
= StepFinished
lambda logging only works "Step
Finished" output trigger configuration
376,Lambda logging in stepped mode lambda logging can only be done in
continuous sweep mode
377,step not multiple of <x> the step size must be a multiple of
the smallest possible step size
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