HP 8559A NOTE, 5msec, SINGLE, FREQUENCY BAND GHz, Connect digital voltmeter to A9TP6, Remove extender board and reinstall Frequency Control Assembly A7

ADJUSTMENTS

5-17. POWER SUPPLY CHECKS AND ADJUSTMENTS(SERIALPREFIX 2236A)(Cont'd)

6.Remove extender board and reinstall Frequency Control Assembly A7.

NOTE

The two following voltage adjustments, + 10V and VO (Varactor Offset), must be adjusted while analyzer is still cold (during first five minutes after turn-on). If instrument has been operating longer than five minutes, turn off mainframe and remove assemblies A8 and A9. Let assemblies A8 and A9 cool on bench for 15 minutes. Replace the two assemblies and proceed with adjustment of A9R2 and A8R62 during the first five minutes after turn-on.

7.Connect digital voltmeter to A9TP6 + 10V and adjust A9R2 + 10Vadjustment for a vokmeter indication of +10.000 Zk 0.100V.

8.Connect digital voltmeter to A8TP2 VO. Set H P 8559A controls as follows:

FREQUENCY BAND GHz	.................................................. .01- 3
ALT IF ............................................................	ON (depressed)
SIC IDENT ........................................................	ON (depressed)
SWEEPTIME/DIV .........................................................	5msec
SWEEP TRIGGER .......................................................	SINGLE

9.The voltage at A8TP2 will change (between two values) each time a sweep is triggered. l'kigger the sweep a few times and select the sweep that yields the least negative VO voltage. Adjust A8R62 VO adjustment for a voltmeter indication of - 2.00 +_ 0.10V.