Agilent Technologies E4406A VSA manual Adjacent Channel Power-Relative Attenuation

Language Reference

SENSe Subsystem

Adjacent Channel Power—Relative Attenuation

[:SENSe]:ACP:OFFSet:LIST:RATTenuation

<rel_powr>,<rel_powr>,<rel_powr>,<rel_powr>,<rel_powr>

[:SENSe]:ACP:OFFSet:LIST:RATTenuation?

Sets a relative amount of attenuation for the measurements made at your offsets. The amount of attenuation is always specified relative to the attenuation that is required to measure the carrier channel. Since the offset channel power is lower than the carrier channel power, less attenuation is required to measure the offset channel and you get wider dynamic range for the measurement.

You can turn off (not use) specific offsets with the

SENS:ACP:OFFSet:LIST:STATe command.

Factory Preset and *RST:

Mode	Offset A	Offset B	Offset C	Offset D	Offset E
Basic &	0 dB	0 dB	0 dB	0 dB	0 dB
cdmaOne

Range: −40 to 0 dB, but this relative attenuation cannot exceed the absolute attenuation range of 0 to 40 dB.

Default Unit:	dB
Remarks:	Remember that the attenuation that you specify is
	always relative to the amount of attenuation used for
	the carrier channel. Selecting negative attenuation
	means that you want less attenuation used. For
	example, if the measurement must use 20 dB of
	attenuation for the carrier measurement and you want
	to use 12 dB less attenuation for the first offset, you
	would send the value −12 dB.
	You must be in Basic or cdmaOne mode to use this
	command. Use INSTrument:SELect to set the mode.

Adjacent Channel Power—Relative Attenuation Control

[:SENSe]:ACP:OFFSet:LIST:RATTenuation:AUTO OFFON01

[:SENSe]:ACP:OFFSet:LIST:RATTenuation:AUTO?

Automatically sets a relative attenuation to make measurements with the optimum dynamic range at the current carrier channel power.

You can turn off (not use) specific offsets with the

SENS:ACP:OFFSet:LIST:STATe command.

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