72 Keysight N777xC Series Tunable Laser Family Programming Guide
4 Measurement Operations & Settings
Lambda logging is disabled at the end of a sweep.
Generally, a continuous sweep can only be started if:
• the trigger frequency, derived from the sweep speed and sweep step, is <= 1 MHz
• the number of triggers, calculated from the sweep span and sweep span, is <=1048576
• the start wavelength is less than the stop wavelength.
In addition, a continuous sweep with lambda logging requires:
• the trigger output to be set to step finished
• modulation set to off.
Parameters: 0 or OFF:
1 or ON:
switch lambda logging off
switch lambda logging on
Response: None
Example: :sour0:wav:swe:llog 1
Affects: All tunable laser modules that support continuous sweep.
Command: :SOURce0:WAVelength:SWEep:LLOGging?
Syntax: :SOURce0:WAVelength:SWEep:LLOGging?
Description: Returns the state of lambda logging.
Parameters: None
Response: A boolean value: 0 – lambda logging is switched off
1 – lambda logging is switched on
Example: :sour0:wav:swe:llog? -> 1
Affects: All tunable laser modules that support continuous sweeps.
Command: :SOURce0:WAVelength:SWEep:MODE
Syntax: :SOURce0:WAVelength:SWEep:MODE<wsp><mode>
Description: Sets the sweep mode.
Cannot be set while a sweep is running.
Parameters: STEPped:
MANual:
CONTinuous:
Stepped sweep mode
Manual sweep mode
Continuous sweep mode
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