Agilent Technologies 8753ES Option 011 Service Manual page 29

2. Press
Preset Meas
3. Press
Marker Search
of the R channel input signal.
−10
4. Press
Power
5. Press
Sweep Setup
6. Check the analyzer display for phase lock error messages:
• If you do not observe a phase lock error message, write the marker value readout
(which appears in the analyzer display) in the performance test record.
• If you do observe a phase lock error message:
a. Press
Power
b. Check the analyzer for phase lock error messages.
c. If the analyzer still doesn't phase lock, continue increasing the source output
power until phase lock is achieved.
d. Write the marker value in the performance test record.
• Repeat steps 5 and 6 for the other CW frequencies listed on the performance test
record.
In Case of Difficulty
1. Check the flexible RF cable between the R sampler assembly and the A11 phase lock
assembly. Make sure it is connected between A11J1 (PL IF IN) and 1st IF Out.
2. Use an ohmmeter to verify that the RF cable is not open. In addition, examine both the
cable connectors — measure the resistance between the cable center pin and the cable
connector. The ohmmeter should display a high resistance reading.
3. Check the R sampler by substituting it with the A sampler and rerun the test:
a. Move cable W8 to the A sampler.
b. Use a 10 dB attenuator between the RF OUT and input A.
c. Repeat the test.
d. Select the A sampler by pressing
e. If the test fails, replace the A11 assembly.
4. Verify that the high/low band adjustments are still within specifications. For more
information on how to perform this task, refer to
Adjustment" on page
5. Refer to Chapter 7 , "Source Troubleshooting,"
Chapter 2
.
R
TRACKING ON SEARCH:MAX
.
x1
CW FREQ 300 k/m
to increase the power by 1 dBm.
Meas
3-45.
3. Receiver Minimum R Channel Level
to locate the maximum value
.
in step 2.
A
"High/Low Band Transition
for troubleshooting information.
Performance Tests
2-13