Agilent Technologies 8163A Programming Manual page 122

Measurement Operations & Settings
command:
syntax:
description:
parameters:
N O T E
N O T E
N O T E
response:
example:
affects:
command:
syntax:
description:
N O T E
parameters:
response:
example:
affects:
122
[:SOURce[n]][:CHANnel[m]]:POWer:ATTenuation[l]
[:SOURce[n]][:CHANnel[m]]:POWer:ATTenuation[l]<wsp><value>[DB|MDB]
Sets the level of attenuation.
Any value in the specified range (see the specifications in the appropriate User's Guide).
Also allowed (for MIN: minimum programmable value
tunable laser
MAX: maximum programmable value
modules only)
DEF: This is not the preset (*RST) default value but is half the sum of, the
are:
minimum programmable value and the maximum programmable value
Use [l] to set the attenuation level of the upper or lower wavelength laser source of a dual-
wavelength laser source or of 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.
Tunable laser modules with in-built optical attenuators need to be in Manual Attenuation
Mode (see "[:SOURce[n]][:CHANnel[m]]:POWer:ATTenuation[l]:AUTO" on page 123) for this
value to have an affect. The output power is a combination of this value and the laser output
power (see "[:SOURce[n]][:CHANnel[m]]:POWer[:LEVel][:IMMediate][:AMPLitude[l]]" on
page 124).
In this respect, this command does not conform to the SCPI standard. The SCPI standard re-
quires that entering an explicit value for the attenuation switches the attenuation mode OFF.
The default units are dB.
none
sour0:pow:att 22.32db
All tunable laser modules with an built-in optical attenuator, and all laser source modules.
[:SOURce[n]][:CHANnel[m]]:POWer:ATTenuation[l]?
[:SOURce[n]][:CHANnel[m]]:POWer:ATTenuation[l]?[MIN|DEF|MAX]
Queries the attenuation level.
When using a tunable laser module with a built-in optical attenuator, the value returned ap-
plies only to the attenuation mode (see
"[:SOURce[n]][:CHANnel[m]]:POWer:ATTenuation[l]:AUTO" on page 123).
Use [l] to query the attenuation level of the upper or lower wavelength laser source of a dual-
wavelength laser source or of 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.
Also allowed (for MIN: minimum amplitude level
tunable laser mod-
MAX: maximum amplitude level
ules 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
attenuation level relevant to the current value or specified parameter (if MIN, MAX, or DEF
are chosen as a parameter).
sour0:pow:att? def → +3.10000000+E001<END>
All tunable laser modules with an in-built optical attenuator, and all laser source modules.
Signal Generation – The SOURce Subsystem
Agilent 8163A/B, 8164A/B & 8166A/B Mainframes, Fifth Edition