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YIG Oscillator
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BBRAM chip on the A9 Processor PCB is replaced and the
Source Calibration Data was not previously saved on disk (thus
data could not be recalled from disk).
Calibration
Procedure
Perform the following steps:
Equipment Required
Refer to Table 1-1, located on page 1-9, for further information about
the following equipment:
EIP Model 578B Frequency Counter, or equivalent.
RF/Microwave Cable
GPIB cable, WILTRON 2100-2, or equivalent
NOTE
Allow the 373XXA and Frequency Counter to warm-up at
least 30 minutes prior to 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 CALIBRATION, and then SOURCE
FREQUENCY CALIBRATION (below).
FREQUENCY CALIBRATION ADJUSTMENTS
6-6 373XXA MM
OPTIONS
TRIGGERS
REAR PANEL
OUTPUT
DIAGNOSTICS
MULTIPLE SOURCE
CONTROL
PRESS <ENTER> TO
SELECT
DIAGNOSTICS
START SELF TEST
READ SERVICE LOG
INSTALLED OPTIONS
PERIPHERAL TESTS
TROUBLESHOOTING
(FOR SERVICE
ONLY)
H/W CALIBRATIONS
(FOR SERVICE
ONLY)
PRESS <ENTER> TO
SELECT
HARDWARE
CALIBRATIONS
(FOR SERVICE
ONLY)
LO1
CALIBRATION
LO2
CALIBRATION
SOURCE FREQUENCY
CALIBRATION
SOURCE ALC
CALIBRATION
DISK OPERATIONS
PREVIOUS MENU
PRESS <ENTER> TO
SELECT
HARDWARE
CALIBRATIONS
(FOR SERVICE
ONLY)
START ALC
FREQ CALIBRATION
PREVIOUS MENU
PRESS <ENTER> TO
SELECT