HP 8559A 10 dB, 30MHz, 30MHz, TUNING, TUNING, - 50 dBm, FREQUENCY, FREQUENCY, INPUT ATTEN, INPUT ATTEN, OUTPUT LEVEL, OUTPUT LEVEL, FREQ SPAN/DIV, FREQ SPAN/DIV

MODEL 8559A ADJUSTMENTS

ADJUSTMENTS

5-19. LOG AMPLIFIER LOG AND LINEAR ADJUSTMENTS (Cont'd)

Linear Output and Linear Step Gain20.Disconnect AlOWl from step attenuator and reconnect to A5J2.

When reconnecting A1OW1 to A5J2, do not tighten to over 6 inch pounds of torque; A5J2 can be damaged if the connector is overtightened.

Set spectrum analyzer controls as follows:
INPUT ATTEN .............................................................	10 dB
REFERENCE LEVEL ....................................................	- 50 dBm
FREQ SPAN/DIV ...............................................................	0
TUNING .................................................................	30MHz
Set signal generator controls as follows:
OUTPUT LEVEL .................................................	approx. - 5 dBm
FREQUENCY ............................................................	30MHz
Set 10-dB step attenuator to 0 dB.

21.Remove adapter from step attenuator and connect step attenuator to spectrum analyzer input. Adjust the signal generator OUTPUT LEVEL for a DVM reading ( k1 mV) of 800 mV plus offset recorded in step 4 (measured at A 15TPI).

22.Set spectrum analyzer amplitude scale for Linear display (LIN) and adjust LIN control A14R34 for DVM reading ( k1 mV) of 800 mV plus offset recorded in step 4.

23.Make adjustments indicated in Table 5-8, then recheck that all steps meet the DVM test limits. Between adjustments, recheck tuning of spectrum analyzer to be certain signal remains peaked.

TABLE 5-8.LINEAR GAIN ADJUSTMENTS

Adjustment	Step Attenuator	Reference Level (dBm)	DVM Reading"
A14R34	0	-50	Ref: 800	+1 mV
A14R33	10	-60	800 k5 mV
A14R30	20	-70	800	+ 5 mV
A14R27	30	-80	800	*5 mV
No adjustment	40	-9 0	800	+ 2 0 mV

*After subtracting offset.