Procedure - Agilent Technologies 8564EC Service Manual

Manual Adjustment Procedures
10 . External Mixer Bias Adjustment

Procedure

1. Press to turn the spectrum analyzer off, and disconnect the ac
LINE
power cord. Remove the spectrum analyzer cover and connect the
equipment as illustrated in
A15 RF assembly. Reconnect the power cord and set the
to on.
2. Set the 3456A controls as follows:
Function ............................................................. DC VOLTS
Range ........................................................................... 0.1 V
Resolution ................................................................ 100 mV
3. On the spectrum analyzer press
, , then
MIXER BIAS
4. Adjust A15R926 EXT BIAS ZERO for a DVM reading of 0.000 Vdc
±12.5 mV.
146
Figure 3-20 on page
AUX CTRL
.
BIAS OFF
145. Fold down the
switch
LINE
,
EXTERNAL
Chapter 3