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Chapter 5 303
Language Reference
SOURce Subsystem
SOURce Subsystem
¶The SOURce subsystem controls the signal characteristics of the tracking
generator. Refer also to the “OUTPut Subsystem” on page 267 which contains a
command that controls the tracking generator output.
Sets the Output Power Offset Correction
:SOURce:CORRection:OFFSet <rel_ampl>
:SOURce:CORRection:OFFSet?
Specifies an offset for the displayed output power level. An offset power level can
be added to the displayed level to compensate for system losses (for example,
cable loss) or gains (for example, preamplifier gain.) This offset does not change
the power out of the source, it only changes the display so that it reads out the
actual power delivered to the device under test.
Factory Preset
and *RST: 0 dB
Range: –327.6 dB to 327.6 dB
Default Unit: Currently selected source power units
Front Panel
Access: Source, Amptd Offset
Source Attenuation
:SOURce:POWer:ATTenuation <ampl>
:SOURce:POWer:ATTenuation?
Attenuates the source output level. Specifically setting
:SOURce:POWer:ATTenuation <ampl> sets the mode to manual
(:SOURce:POWer:ATTenuation:AUTO OFF).
CAUTION 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.
Factory Preset
and *RST: EMC E7401A: 0 dB
EMC E7402A: 8 dB
EMC E7403A: 8 dB
EMC E7404A: 8 dB