Chapter 12 595
RF Section
Troubleshooting Using the Diagnostic Software
Troubleshooting Using the Diagnostic
Software
The adjustment and diagnostic software is documented in Chapter 2 .
The software troubleshoots RF failures by testing signal paths and
allowing you to control various latches and DACs. The first thing it does
is to check that all of the frequency bands are functional. Depending on
the results of that testing it may do some other checks.
Using the 8564E and 8565E adjustment/diagnostic software, select
the RF diagnostics.
Connect the test board between the A7 LOMA and A10/A12
RYTHM/SBTX microcircuits, and the A14 Frequency Control board.
The test board is labeled µCKT and INSTR SIDE.
1. Disconnect W16 from A14J9 and W12 from A14J10.
2. Connect W16 to J4 on the test board and W12 to J5 on the test
board.
3. Connect J2 on the test board to A14J10 (use 24-conductor ribbon
cable, part number 08564-60012).
4. Connect J1 on the test board to A14J9 (use 20-conductor ribbon
cable, part number 8120-5526).
You will then be prompted to make different connections to the
85629B Test and Adjustment Module (TAM), a source or spectrum
analyzer. Connection locations are shown in Figure 12-1 on page
596 and Figure 12-2 on page 597.
The software can be used to control the DACs and latches for
troubleshooting. Refer to Chapter 2 , “Adjustment/Diagnostic Software,”
for listings of DACs and latches.
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