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306 Chapter 5
Language Reference
SOURce Subsystem
Factory Preset
and *RST: 0 dB
Range: 0 dB to 20 dB
Default Unit: dB
Set the Output Power at the Start of the Sweep
:SOURce:POWer:STARt <ampl>
:SOURce:POWer:STARt?
Specifies the source output power level at the start of the power sweep. Use
:SOURce:POWer:SPAN to set the change in power level across the sweep. This
command is equivalent to
:SOURce:POWer[:LEVel][:IMMediate][:AMPLitude].
CAUTION Power-level sensitive devices connected to the tracking generator output may be
accidentally damaged. This is because the actual source amplitude may be greater
than the amplitude indicated on the analyzer when the source attenuation is set
manually.
When source attenuation is set to manual
(:SOURce:POWer:ATTenuation:AUTO OFF), source amplitude may be set to
values beyond actual output levels to accommodate the full range of analyzer
capabilities. Therefore, exercise caution when connecting a power-level sensitive
device to the tracking generator output.
Set the Output Power to Step Automatically
:SOURce:POWer:STEP:AUTO OFF|ON|0|1
:SOURce:POWer:STEP:AUTO?
Specifies the source power step size to be one vertical scale division when in
logarithmic scale, or 10 dB when in linear scale.
Factory Preset
and *RST: On
Front Panel
Access:
Source, Amptd Step Auto Man
Set the Output Power Step Size
:SOURce:POWer:STEP[:INCRement] <ampl>
:SOURce:POWer:STEP[:INCRement]?
Specifies the source power step size.
Default Unit: dB