HP 8559A Operation And Service Manual page 193

Set output level of signal generator for a digital voltmeter reading of
Set Amplitude Scale to 10 dB/DIV and adjust A14R2 LOG LIN adjustment for a digital voltmeter reading
of 800 mV plus offset.
Repeat step 14 to recheck the log fidelity.
Set the REF LEVEL dBm control to - 50. Set Amplitude Scale to 1 dB/DIV.
Set the step attenuator to 0 dB and set output level of signal generator for a digital voltmeter reading of
Set the REF LEVEL dBm control to
adjustment for a digital voltmeter reading of
Change REFERENCE LEVEL and step attenuator settings as shown in Table
ence should not exceed the given limits.
Reference Level
-50
- 6 0
-70
-80
-90
Return the TEST-NORM switch on assembly A12 to the NORM position.
ADJUSTMENTS
-
90 and the step attenuator to 40 dB. Adjust A14R1, LOG GAIN
700
TABLE 5-8. LOG GAIN ADJUSTMENT LIMITS
Step Attenuator
Setting (dB)
0
10
20
30
40
800
Deviation from Refer-
5-8.
Deviation From
Reference
Reference (700 mV)
+30 mV
+30
700