HP 8559A (2 required), PERFORMANCE TESTS, Log Display Accuracy, 4-26.DISPLAY FIDELITY

PERFORMANCETESTS MODEL8559A

PERFORMANCE TESTS

,

4-26. DISPLAY FIDELITY

SPECIFICATION:

Log Incremental Accuracy: f0.1 dB per dB from Reference Level

Log Maximum Cumulative Error: <+_ 1.5 dB over entire 70-dB range

Linear Accuracy; t-3% of Reference Level

DESCRIPTION:

The amplitude of the log display amplifier is tested by connecting a DVM to the display (AUX A) VERTICAL OUTPUT connector. A wide resolution bandwidth setting is selected so the signal appears as a straight horizontal line on the CRT The DVM is used to provide good resolution when checking for +1 dB per 10 dB step (0.1 dB/dB).

SIONAL GENERATOR

D I O I T A L VOLTMETER

SPECTRL

ADAPTER 1		STEP	ADAPTER A
	ATTENUATOR
		-
FIGURE 4-22.DISPLAYFIDELITY TEST SETUP
EQUIPMENT
SignalGenerator .........................................................				HP8640B
Digitalvoltmeter ........................................................				HP3556A
Step Attenuator (10 dB/step) ......................................			HP 355D, Opt. H82
Adapter, Type N (m) to BNC (f)	(2 required) ...............................			HP 1250-0780
Cable, BNC to Banana Plug ..............................................				HP 11001A

PROCEDURE:

Log Display Accuracy

1.Set equipment controls as follows: Spectrum Analyzer:

FREQUENCYBANDGHz	.................................................. .01-3
TUNING ..............................................................	0.030GHz