Keysight Technologies 8163A/B, Programming Manual

Page: 149 / 306

8163A/B, 8164A/B & 8166A/B Mainframes Programming Guide 149
Measurement Operations & Settings 4
command: [:SOURce[ n ]][:CHANnel[ m ]]:POWer[:LEVel][:IMMediate][:AMPLitude[ l ]]?
syntax: [:SOURce[ n ]][:CHANnel[ m ]]:POWer[:LEVel][:IMMediate][:AMPLitude[ l ]]?<wsp>
[MIN|DEF|MAX]
description: Returns the amplitude level of the output power.
The value returned is the actual amplitude that is output, which may be different from the value set for the output. If these
two figures are not the same, it is indicated in the :STATus: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[l]:AUTO
on page 146).
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 145).
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.
parameters: Also allowed
(for tunable laser modules
only) are: MIN: minimum amplitude level
MAX: maximum amplitude level
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 .
response: Amplitude level relevant to the current value or specified parameter (if MIN, MAX, or DEF are chosen as a parameter).
example: sour2:pow?
->
+8.00000000E-004<END>
affects: All laser sources, DFB sources, and tunable laser modules including 81950A and return loss modules with an internal source