L. Center Frequency Tuning Values - HP 8560A Service Manual

2. Set the HP 8560A to the following settings:
SPAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . OHz
C E N T E R F R E Q
CF STEP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.5 MHz
3. Use the step keys to tune the CENTER
4. As the sampling oscillator frequency is increased, the DVM reading should also increase.
The voltage remains at approximately +5.5 Vdc. If the tune voltage is correct, but the
ADC measures the voltage and determines it to be out of specification, troubleshoot the
A3 assembly's ADC MUX.
5. Disconnect W37 from A14J301.
6. Connect a test cable from W37 to the input of another spectrum analyzer. Tune the other
spectrum analyzer to the following settings:
Center Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 MHz
Span . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..2MHz
7. The amplitude of the 10 MHz reference signal should measure >-1 dBm. If the signal
does not measure >-1 dBm, troubleshoot A15's 10 MHz Distribution and A21 OCXO
(if Option 003 is present).
8. Reconnect W37 from A14J301.
9. Connect the CAL OUTPUT to INPUT 50R.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 389.5MHz
to the values listed in Table 10-l.
Table 10-l. Center Frequency Tuning Values
HP 8560A
389.5
427.0
449.5
464.5
479.5
502.0
509.5
539.5
569.5
577.0
599.5
614.5
629.5
652.0
659.5
sampling
280.0
282.5
284.0
285.0
286.0
287.5
288.0
290.0
292.0
292.5
294.0
295.0
296.0
297.5
298.0
Synthesizer Section 10-3