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Signal Generation – The SOURce Subsystem Measurement Operations & Settings
Agilent 8163A/B, 8164A/B & 8166A/B Mainframes, Fifth Edition 135
command:
[:SOURce[n]][:CHANnel[m]]:WAVelength:FREQuency[l]?
syntax: [:SOURce[n]][:CHANnel[m]]:WAVelength:FREQuency[l]?
description: Returns the frequency difference used to calculate a relative wavelength.
NOTE
Use [l] to query the frequency of the upper or lower wavelength laser source of a dual-wave-
length laser source or a return loss module with an internal dual-wavelength laser source.
The default value of [l] is 1, the lower wavelength source. The upper wavelength source is
denoted by 2.
parameters: none
response: Returns the frequency difference as a float value in Hz.
example: wav:freq? → -1.00000000E+013<END>
affects: All tunable laser sources
command:
[:SOURce[n]][:CHANnel[m]]:WAVelength:REFerence[l]?
syntax: [:SOURce[n]][:CHANnel[m]]:WAVelength:REFerence[l]?
description: Returns the reference wavelength (λ
0
).
parameters: none
response: The wavelength as a float value in meters.
example: sour2:wav:ref? → +1.5500000E-006<END>
affects: All tunable laser and DFB modules
command:
[:SOURce[n]][:CHANnel[m]]:WAVelength:REFerence:DISPlay
syntax: [:SOURce[n]][:CHANnel[m]]:WAVelength:REFerence:DISPlay
description: Sets the reference wavelength to the value of the output wavelength (λ → λ
0
), that is, sets
the frequency offset (df) to zero.
parameters: none
response: none
example: sour2:wav:ref:disp
affects: All tunable laser and DFB modules