86 Chapter2
Adjustment Procedures
6. Sampling Oscillator Adjustment
6. If the difference between the maximum and minimum voltages is
less than 0.50 V, and all voltage readings are between +0.5 and +2.5
Vdc, proceed to step 15.
7. Locate the center frequency at which the voltage is lowest. Use the
keypad to set the HP 8560E/EC to this frequency.
8. Readjust SMPL MATCH to set the displayed voltage to 0.8 ±0.1 Vdc.
9. Set the HP 8560E/EC center frequency to 2302.3 MHz and repeat
steps 9 through 13.
10.Move the positive DVM test lead to A15J400 pin 3. Check that the
measured voltage is the negative of the voltage at pin 1, within ±0.1
Vdc.
11.Disconnect the DVM probes from A15J400.
Table 2-11 Sampling Adjustments
Center
Frequency
(MHz)
Sampling
Oscillator
(MHz)
Displayed Voltage (Vdc)
1st
Trial
2nd
Trial
3rd
Trial
4th
Trial
5th
Trial
2156.3 285.000
2176.3 286.364
2230.3 288.462
2263.3 290.000
2302.3 291.667
2158.3 293.478
2196.3 295.000
2378.3 296.471
2422.3 297.222
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