Agilent Technologies 8163A Programming Manual page 102

Measurement Operations & Settings
command:
syntax:
description:
NO TE
parameters:
NO TE
response:
example:
affects:
102
[:SOURce[n]][:CHANnel[m]]:POWer[:LEVel][:IMMediate][:AMPLitude[l]]?
[:SOURce[n]][:CHANnel[m]]:POWer[:LEVel][:IMMediate][:AMPLitude[l]]?<wsp>
[MIN|DEF|MAX]
Returns the amplitude level of the output power.
The value returned is the actual amplitude that is output, which may be dif-ferent from the
value set for the output. If these two figures are not the same, it is indicated in the :STA-
Tus:OPERation register.
If an optical attenuator is installed, the power value returned is dependent on
whether you are using power or attenuation mode (see
"[:SOURce[n]][:CHANnel[m]]:POWer:ATTenuation:AUTO" on page 99).
• If you are using power mode, the value returned is the output power.
• If you are using attenuation mode, the value returned is the laser output power,
and you must also use the attenuation value to calculate the output power (see
"[:SOURce[n]][:CHANnel[m]]:POWer:ATTenuation[l]" on page 98).
The values for the output power that you set in the Power Mode, and the laser
output power that you set in the Attenuation Mode, are stored and used
independently.
Also allowed MIN: minimum amplitude level
(for tunable laser
MAX: maximum amplitude level
modules only) are:
DEF: This is not the preset (*RST) default value but is half the sum
of, the minimum amplitude level and the maximum amplitude level
Use [l] to query the amplitude level of the output power of the upper or lower wavelength
laser source of a dual-wavelength 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.
Amplitude level relevant to the current value or specified parameter (if MIN, MAX, or DEF
are chosen as a parameter).
sour2:pow? → +8.00000000E-004<END>
All laser source, DFB source, and tunable laser modules and return loss modules with an
internal source
Agilent 8163A Lightwave Multimeter, Agilent 8164A Lightwave Measurement System,
& Agilent 8166A Lightwave Multichannel System, Third Edition
Signal Generation – The SOURce Subsystem