Agilent Technologies 8753ES Option 011 Service Manual page 245

4. Verify the remaining CW frequencies, comparing the counter reading with the value in
Table 7-2:
• Press
2 M/µ
• Press
50 M/µ
Table 7-2 Analog Bus Check of Reference Frequencies
CW Frequency Analog Bus Node 21
500 kHz 0.100 MHz
2 MHz 0.100 MHz
50 MHz 0.100 MHz
NOTE: The counter should indicate the frequencies listed in this table to within ±0.1%.
Accuracy may vary with gate time and signal strength.
5. Press to count the frequency of the 2nd LO signal.
24 x1
6. Press
Sweep Setup
the corresponding 2nd LO value for the CW frequency. (Refer to
7. Verify the remaining CW frequencies, comparing the counter reading with the value in
Table 7-2:
• Press
2 M/µ
• Press
50 M/µ
8. Press to count the frequency of the PLREF signal.
25 x1
9. Press
Sweep Setup
the corresponding PLREF value for the CW frequency. (Refer to
10.Verify the remaining CW frequencies, comparing the counter reading with the value in
Table 7-2:
• Press
2 M/µ
• Press
50 M/µ
11.Check the results.
• If all the counter readings match the frequencies listed in
"A13/A14 Fractional-N Check" on page
• If the counter readings are incorrect at the 500 kHz and 2 MHz settings only, go to
"FN LO at A12 Check" on page
• If all the counter readings are incorrect at all three CW frequencies, the counter may
be faulty. Perform the
the signals are good, either the A10 or A14 assemblies could be faulty.)
Chapter 7
.
.
Analog Bus Node 24
100 kHz
0.504 MHz
2.007 MHz
0.996 MHz
CW FREQ
500
.
.
CW FREQ
500
.
.
7-16.
"Oscilloscope Method"
Analog Bus Node 25
2nd LO
0.500 MHz
2.000 MHz
1.000 MHz
. Verify that the counter reading matches
k/m
. Verify that the counter reading matches
k/m
Table
7-20.
check of the signals described next. (If
Source Troubleshooting
Phase Lock Error
PLREF
Table 7-2.)
Table 7-2.)
7-2, skip ahead to
7-13