Confirming A Faulty Synthesizer Section - Agilent Technologies 8564EC Service Manual

4. As the sampling oscillator frequency is increased, the DVM reading
Table 11-2 Center Frequency Tuning Values
8564EC and 8565EC Center
Frequency (MHz)
2156.3
2176.3
2199.5
2230.3
799.3
2263.3
2282.3
2302.3
2155.3
2158.3
2336.3
2196.3
1.3
2378.3
2410.3
2422.3
5. Disconnect W37 from A14J301.
Check A14J301
10 MHz reference
6. Connect a test cable from W37 to the input of another spectrum
input (steps 5-8)
7. The amplitude of the 10 MHz reference signal should measure
8. Reconnect W37 to A14J301.
Check 1st LO 9. Connect the CAL OUTPUT to INPUT 50Ω.
(steps 9-11)
Chapter 11
should also increase. If the tune voltage is correct, but the ADC
measures the voltage and determines it to be out of specification,
troubleshoot the A3 assembly ADC MUX.
analyzer. Tune the other spectrum analyzer to the following settings:
Center frequency .................................................... 10 MHz
Span .......................................................................... 2 MHz
>−1 dBm. If the signal does not measure >−1 dBm, troubleshoot the
A15 10 MHz distribution and A21 OCXO (If not Option 103).
Confirming a Faulty Synthesizer Section
Sampling Oscillator Frequency
(MHz)
285.000
286.364
287.500
288.462
288.889
290.000
290.909
291.667
292.500
293.478
294.444
295.000
296.000
296.471
297.000
297.222
Synthesizer Section
529