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Equipment Required
None
NOTE
Allow the 373XXA to warm-up at least 30 minutes prior to
performing calibration, and perform the ALC calibration
(paragraph 6-3) before doing this calibration.
Procedure
Step 1. If recalibrating a 37397A , install broadband terminations
to both ports or install a throughline between ports.
Step 2. Press the Option Menu key (Enhancement key group) to dis
-
play the OPTIONS menu.
Step 3.
Select DIAGNOSTICS from menu.Then select in se
-
quence: H/W CALIBRATIONS then SOURCE THRESH
-
OLD CALIBRATION.
Step 4. Follow the directions displayed on the 373XXA CRT screen,
until calibration is completed.
Post Calibration
Actions
After the calibration process is completed, perform the following ac-
tions, as appropriate:
If calibration passes:
Save the calibration data to (hard) disk, as follows:
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 |DISK OPERATIONS
|SAVE TO HARD DISK|HW_CAL.SLT.
NOTE
Also save the calibration data to floppy disk
for archival purposes as a backup in case of
a hard disk failure. Label the disk with cali
-
bration type, date, and system model and se
-
rial numbers. Set the copy protect tab on the
disk. Properly safeguard the disk so that it
will be available for later use, as needed.
If calibration fails:
q
Repeat the calibration. If it still fails, then proceed to Chapter 5,
Troubleshooting.
SOURCE LOCK THRESHOLD ADJUSTMENTS
6-12 373XXA MM