Agilent Technologies 8163A Programming Manual page 140

Measurement Operations & Settings
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140
[:SOURce[n]][:CHANnel[m]]:WAVelength:SWEep:LLOGging
[:SOURce[n]][:CHANnel[m]]:WAVelength:SWEep:LLOGging<wsp>OFF|ON|0|1
Switches lambda logging on or off. Lambda logging is a feature that records the exact wave-
length of a tunable laser module when a trigger is generated during a continuous sweep. You
can read this data using the [:SOURce[n]][:CHANnel[m]]:READout:DATA? command.
The following settings are the prerequisites for Lambda Logging:
Set "[:SOURce[n]][:CHANnel[m]]:WAVelength:SWEep:MODE" on page 141 to CONTinuous.
Set ":TRIGger[n][:CHANnel[m]]:OUTPut" on page 176 to STFinished (step finished).
Set "[:SOURce[n]][:CHANnel[m]]:WAVelength:SWEep:CYCLes" on page 137 to 1.
Set "[:SOURce[n]][:CHANnel[m]]:AM:STATe[l]" on page 117 to OFF.
If any of the above prerequisites are not met, then when the sweep is started the status
"Sweep parameters inconsistent" will be returned and Lambda Logging will automatically
be turned off.
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 <= 40kHz
the number of triggers, calculated from the sweep span and sweep span, is <=100001
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 coherence control or off.
0 or OFF:
1 or ON:
none
wav:swe:llog 1
All tunable laser modules except Agilent 81649A and Agilent 81689A/B
[:SOURce[n]][:CHANnel[m]]:WAVelength:SWEep:LLOGging?
[:SOURce[n]][:CHANnel[m]]:WAVelength:SWEep:LLOGging?
Returns the state of lambda logging.
none
A boolean value:
→
wav:swe:llog? 1<END>
All tunable laser modules except Agilent 81649A and Agilent 81689A/B
Signal Generation – The SOURce Subsystem
switch lambda logging off
switch lambda logging on
0 – lambda logging is switched off
1 – lambda logging is switched on
Agilent 8163A/B, 8164A/B & 8166A/B Mainframes, Fifth Edition