HP 8559A Power Meter, Powersensor, Power Splitter, 20-dBAttenuator, Signal Generator, Adapter, Type N (f) to N (f), 4-20. GAlN COMPRESSION

MODEL8559A PERFORMANCE TESTS

PERFORMANCE TESTS

4-20.GAlN COMPRESSION

SPECIFICATION:

Gain compression is less than 0.5 dB for a - 10 dBm input level with 0 dB attenuation.

DESCRIPTION:

Gain compression is measured by changing the power level at the spectrum analyzer input from -20 dBm to

-10 dBm. The displayed signal level will change by less than 10 dB, indicating gain compression in the input mixer. Since a 10-dB change in IF gain is used to keep the signal trace near the same point on the display when the input power is increased, the error due to this IF gain change is first measured, then subtracted from the displayed deviation to give the deviation due only to gain compression.

SPECTRUM

ANALYZER

	SIGNAL GENERATOR		POWER
			METER
			o O o
			RF
		lOUTPUT
	POWER	$ADAPTER
20 dB	SPL l TTER
ATTENUATOR	(CONNECTS DIRECTLY
	TO 2OdE ATTENUATOR

DJ

ADAPTER
FIGURE 4-16,GAlNCOMPRESSIONTEST SETUP
EQUIPMENT:
Signal Generator .........................................................	H P 8640B
Power Meter ...........................................................	HP 435A/B
Powersensor ...........................................................	HP8481A
Power Splitter .................................................	H P 1 1667A,Opt. C16
20-dB Attenuator ................................................	H P 8491B, Opt. 010
Adapter, Type N (m) to BNC (f) (2 required). ..............................	H P 1250-0780
Adapter, Type N (f) to N (f) .............................................	H P 1250-1472