Agilent Technologies 8753ES Option 011 Service Manual page 261

Phase Lock Check by Signal Examination
To confirm that the A11 assembly is receiving the signals required for its proper operation,
perform the following steps.
1. Place the A11 assembly on the large extender board.
2. Switch on the analyzer and press
3. Check for the signals listed in
Table 7-8 A11 Input Signals
Mnemonic I/O Access
FM COIL −
O A11P1-3,33
REF I A11TP9
YO COIL + O A11P1-2,32
YO COIL −
O A11P1-1,31
1ST IF I A11 PL IF IN
Figure 7-27 FM Coil – Plot with 3 Point Sweep
4. If any of the input signal is not proper, refer to the overall block diagram in
"Start Troubleshooting Here,"
5. If any of the output signals is not proper, the A11 assembly is faulty.
Chapter 7
.
Preset
Table 7-8.
See Figure Notes
Figure 7-27
Aids YO COIL in setting YIG. Press
Sweep Setup
3 x1
Figure 7-9 Observe both low band and high band CW
,
frequencies.
Figure 7-10
Figure 7-7
SOURCE PLL OFF
Use
Figure 7-7
Figure 7-26 Check for 1 MHz with tee a A11 jack (not at cable
end) in high band. Use A7 pulse generator check
setup.
as an aid to troubleshooting the problem to its source.
Source Troubleshooting
Phase Lock Error
NUMBER OF POINTS
to observe this signal.
.
Preset
Chapter 4 ,
7-29