HP 8559A OdB, OFF, OFF, OFF, AUTO, 50kHz, Replace, FREERUN, 0.030GHz, - 10 dBm, 1 dB/DIV, 2o'clock, FREQUENCY BAND GHz, 300 kHz, uncoupled, Vernier Accuracy

MODEL 8559A PERFORMANCETESTS

PERFORMANCE TESTS4-23. REFERENCE LEVEL ACCURACY (Cont'd)Vernier Accuracy

9.Replace 10-dB step attenuator with 1-dB step attenuator. Set spectrum analyzer controls as follows:

FREQUENCY BAND GHz	.................................................. .01- 3
TUNING ..............................................................	0.030GHz
FREQSPAN/DIV ..........................................................	50kHz
RESOLUTION BW ..............................................	300 kHz, uncoupled
INPUTATTEN ..............................................................	OdB
REFERENCE LEVEL ....................................................	- 10 dBm
REFLEVELFINE ..............................................................	0
AmplitudeScale .........................................................	1 dB/DIV
SWEEPTIME/DIV ........................................................	AUTO
SWEEPTRIGGER .....................................................	FREERUN
ALT IF .....................................................................	OFF
SIGIDENT .................................................................	OFF
BLCLIP ....................................................................	OFF
VIDEOFILTER ..........................................................	2o'clock

10.Set step attenuator to 0 dB. Center signal on CRT and adjust signal generator OUTPUT LEVEL control to position peak of signal 6 divisions above graticule baseline. Set step attenuator and spectrum analyzer REFERENCE LEVEL FINE control to settings indicated in Table 4-13. Record deviation of signal peak from 6th division for each setting.

11.To compute Corrected Deviation, add Step Attenuator Error to Deviation from 6th Division for each setting. Corrected Deviation should not exceed k 0.5 dB for each setting. Record maximum value.

TABLE 4-13.VERNIER ACCURACY

	-- -	- --
Step Attenuator	REFERENCE		Deviation from	Step Attenuator	Corrected
Setting	LEVEL FINE		6th Division	Error (Calibration)*	Deviation
(dB)	Setting		(dB)	(dB)	(dB)

0(Ref)

*Attenuations >dial settings are positive (t).Attenuations <diaI settings are negative (-).