3 SCPI
3.3 Instrument subsystem command
43
Key Entry:
【
Amplitude
】
—> [Level Control]->[Ext Detector Couple]
[:SOURce]:POWer:ALC[:STATe] <State>
Function:
This command enables you to turn ALC loop ON or OFF. ALC Loop is mainly to correct
amplitude drift and to make the signal generator output amplitude level not change
with time and temperature.
Setting format:
[:SOURce]:POWer:ALC[:STATe] ON|OFF|1|0
Query format:
[:SOURce]:POWer:ALC[:STATe]?
Parameter:
<State> Boolean data is as follows:
ON | 1: ALC Loop is turned off,
OFF | 0: ACL Loop is turned on.
Example:
:POWer:ALC 1 This example indicates ALC Loop state is set as ALC-OFF.
Reset status:
1
Key Entry:
【
Amplitude
】
—> [ALC Loop Config]—>[ALC Loop State ALC-OFF ALC-ON]
[:SOURce]:POWer:ATTenuation <Atten>
Function:
This command is used for setting power amplitude attenuation value of the mechanical
attenuator of the signal generator. The value set by this command will be valid only
when the attenuator is set to Manual. For setting auto/manual mode of attenuator, see
the command ―
:POWer:ATTenuation:AUTO
‖.
The minimum attenuation step set by this command is 5 dB, that is, users can only set
attenuation to 0 dB, 5 dB, 10 dB, 15 dB by step of 5 dB. After Attenuation is set, the
signal generator output amplitude is the current ALC minus the currently set
attenuation.
Setting format:
[:SOURce]:POWer:ATTenuation <value>
Query format:
[:SOURce]:POWer:ATTenuation?
Parameter:
<Atten> Amplitude attenuation.
Range: 115dB[0dB
,
115dB].
Example:
:POWer:ATTenuation 15dB Attenuation is 15 dB.
Reset status:
115dB
Key Entry:
【
Amplitude
】
—>[Atten Config]—>[Attenuation]
[:SOURce]:POWer:ATTenuation:AUTO <State>
Function:
This command sets the control state of internal programmable step attenuator: Auto or
Manual. In Auto mode, the signal generator automatically sets the value of amplitude
attenuator based on the current output amplitude; in Manual mode, the current
amplitude attenuation of attenuator does not change during the process of changing
amplitude output level.
Setting format:
[:SOURce]:POWer:ATTenuation:AUTO ON|OFF|1|0
Query format:
[:SOURce]:POWer:ATTenuation:AUTO?
Summary of Contents for 1465 Series
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