HP 8559A User Manual

ADJUSTMENTS
519. LOG AMPLIFIER LOG AND LINEAR ADJUSTMENT (SERIAL PREFIX 22O8A) (Cont'd)
Set output level of signal generator for a digital voltmeter reading of 800 mV plus offset (algebraic sum)
f lmY
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 700
mV (do not include offset).
Set the REF LEVEL dBm control to - 90 and the step attenuator to 40 dB. Adjust A14R1, LOG GAIN
adjustment for a digital voltmeter reading of
700 mY
Change REFERENCE LEVEL and step attenuator settings as shown in Table 5 - 8. Deviation from Refer-
ence should not exceed the given limits.
TABLE 5-8. LOG GAIN ADJUSTMENT LIMITS
Return the TEST-NORM switch on assembly A12 to the NORM position.
Reference Level
(dBm)
- 50
-60
- 70
- 80
- 90
Step Attenuator
Setting (dB)
0
10
20
30
40
Deviation From
Reference
Reference (700 mV)
k30 mV
+30 mV
+30 mV
*30 mV

HP 8559A Specifications

General

Brand	HP
Model	8559A
Category	Measuring Instruments
Language	English