Anritsu 373XXA User Manual
Chapter 6
Adjustments
Adjustments
6-1
INTRODUCTION
This chapter contains procedures that are used to restore the calibration
of the 373XXA signal source and the related source lock system assem-
blies. Use these procedures after various signal source related assemblies
have been replaced due to troubleshooting or repair activities.
of the 373XXA signal source and the related source lock system assem-
blies. Use these procedures after various signal source related assemblies
have been replaced due to troubleshooting or repair activities.
Please insure you have read and fully understand the servicing con-
cepts for the 373XXA presented in Chapter 1 prior to continuing with
this chapter.
cepts for the 373XXA presented in Chapter 1 prior to continuing with
this chapter.
6-2
LO1 CALIBRATION
This procedure uses the 373XXA internal diagnostics and calibration
menus to adjust the A1 1st LO PCB assembly. Perform this calibation
procedure if:
menus to adjust the A1 1st LO PCB assembly. Perform this calibation
procedure if:
q
The A1 PCB is replaced.
q
BBRAM chip on A9 Processor PCB is replaced and the Source
Lock Threshold Calibration data was not previously saved on
disk (that is, data is not available for recall from a floppy disk).
Lock Threshold Calibration data was not previously saved on
disk (that is, data is not available for recall from a floppy disk).
Calibration
Procedure
Perform the following steps:
Equipment Required
None
NOTE
Allow the 373XXA to warm-up at least 30 minutes prior to
performing calibration.
performing calibration.
Procedure
Step 1.
Press the
Option Menu
key (Enhancement key group) to dis-
play the OPTIONS menu.
Step 2.
Select DIAGNOSTICS from menu.Then select in se-
quence: H/W CALIBRATIONS then LO1 CALIBRA-
TION.
quence: H/W CALIBRATIONS then LO1 CALIBRA-
TION.
Step 3.
Follow the directions displayed on the 373XXA CRT screen,
until calibration is completed.
until calibration is completed.
Post Calibration
Actions
After the calibration process is completed, perform the following ac-
tions, as appropriate:
tions, as appropriate:
373XXA MM
6-3