Measurement Operations & Settings Signal Generation – The SOURce Subsystem
134 Agilent 8163A/B, 8164A/B & 8166A/B Mainframes, Fifth Edition
command: [:SOURce[ n]][:CHANnel[m]]:WAVelength:CORRection:ZERO:TEMPerature:LASTzero?
syntax: [:SOURce[n]][:CHANnel[m]]:WAVelength:CORRection:ZERO:TEMPerature:LASTzero?
description: Reports the temperature at which t he last auto lamda zero too k place.
parameters: none
response: float value; temperature in °C
example: sour0:wav:corr:zero:temp:last?
affects: All tunable laser modules except A gilent 81649A, Agilent 81689 A/B and 819xxA/B
command: [:SOURce[n]][:CHANnel[m]]:WAVelength:CORRection:ZERO:AUTO
syntax: [:SOURce[n]][:CHANnel[m]]:WAVelength:C ORRection:ZERO: AUTO
descripti on: Forces an auto la mda zer o. This is quic ker but a litt le less accurat e than the equ ilavent manual
process because some checks are omitted:
parameters: none
response: none
example: sour0:wav:corr:zero:auto
affects: All tunable laser modules except Ag ilent 81649A, Agilent 81689A/B and 819xxA/B
command: [:SOURce[ n]][:CHANnel[m]]:WAVelength:FREQuency[l]
syntax: [:SOURce[n]][:CHANnel[m]]:WAVelength:FREQuency[l]<wsp><value>
[THZ|GHZ|MHZ|KHZ|HZ]
description: Sets the frequency diff erence used to cal culate a relative wav elength. The output wave-
length is made up of the reference wavelength and this frequency difference.
The default units for frequency are Hertz.
The output wavelength (λ) is set from the base wavelength (λ0) and the frequency offset
(df). The formula for calculating the output wavelength is:
where c is the speed of light in a vacuum ( 2.990 x 108 ms-1)
NOTE Use [l] to set 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 sourc e. The upper wave length source is
denoted by2.
parameters: The frequency difference is a float v alue in Hz.
response: none
example: sour0:wav:freq -10THZ
affects: All tunable laser sources
λ
c()
λ
odf()c+()
---------------------------------
λ
o
=