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Signal Generation – The SOURce Subsystem Measurement Operations & Settings
Agilent 8163A/B, 8164A/B & 8166A/B Mainframes, Fifth Edition 123
command:
[:SOURce[n]][:CHANnel[m]]:POWer:ATTenuation[l]:AUTO
syntax: [:SOURce[n]][:CHANnel[m]]:POWer:ATTenuation[l]:AUTO<wsp>OFF|ON|0|1
description: Selects Automatic or Manual Attenuation Mode.
In Automatic Attenuation Mode, you specify the output power.
In Manual Attenuation Mode, you must specify both the laser output power, and the attenu-
ation level.
parameters: OFF or 0:
ON or 1:
Attenuation Mode
Power Mode
response: none
example: sour0:pow:att:auto 1
affects: All tunable laser sources with a built-in optical attenuator.
command:
[:SOURce[n]][:CHANnel[m]]:POWer:ATTenuation[l]:AUTO?
syntax: [:SOURce[n]][:CHANnel[m]]:POWer:ATTenuation[l]:AUTO?
description: Queries whether the instrument is in Automatic or Manual Attenuation Mode.
parameters: none
response: 0:
1:
Manual Attenuation Mode
Automatic Attenuation Mode
example: sour0:pow:att:auto? → 1<END>
affects: All tunable laser modules with a built-in optical attenuator.
command:
[:SOURce[n]][:CHANnel[m]]:POWer:ATTenuation[l]:DARK
syntax: [:SOURce[n]][:CHANnel[m]]:POWer:ATTenuation[l]:DARK<wsp>OFF|ON|0|1
description: Sets or unsets the attenuator to ‘dark’ position.
Dark position blocks all light from the laser. You can use this as an alternative to disabling
the laser, the advantage of doing this is that you avoid the laser rise time.
This command is available in Attenuation Mode Only.
parameters: OFF or 0:
ON or 1:
Unsets dark position
Sets dark position
response: none
example: sour0:pow:att:dark 1
affects: All tunable laser modules with a built-in optical attenuator.