HP HP 8566B, Руководство по настройке

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17. Loop Phase Lock Adjustments
3. Set the frequency synthesizer for a 20 0 output.
Connect the frequency synthesizer 50-ohm OUTPUT to
using a BNC to Alligator clip adapter. Connect the ground lead of
the adapter to the metal cover of the VCO Assembly.
4. Connect the high-frequency active probe to the RF INPUT of
the second spectrum analyzer and to the probe power supply, as
shown in Figure 3-77.
5. Press on the second spectrum analyzer. Connect the
active probe tip to the CAL OUTPUT signal, and press (RECALL].
6. Adjust the AMPTD CAL control on the second spectrum analyzer
for a -10.00 displayed signal, and then press
7. Set the controls of the second spectrum analyzer as follows:
CENTER FREQUENCY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FREQUENCY SPAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
REFERENCE LEVEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0
LOG SCALE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 dB/DIV
VIDEO BW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hz
8. Connect the active probe tip to the lead of A10AlL7 closest to
as indicated in Figure 3-78. The 20 signal (from
the 40 LPF) should be visible on the display of the second
spectrum analyzer.
9. Press MARKER [
PEAK SEARCH
],
REF
on the second
spectrum analyzer to position the peak of the 20 signal at the
top graticule line. Press MARKER la] on the second spectrum
analyzer.
10. Set the frequency synthesizer for an output frequency of 50
Adjustments and are
sealed
at the factory and
normally do not require readjustment unless a component failure has
occurred. To verify their proper adjustment, skip to step 12.
11. Adjust and 50 NULL adjustments to
minimize the amplitude of the 50 signal displayed on the
second spectrum analyzer. Refer to Figure 3-78 for the location of
and 50 NULL adjustments.
3-148 Adjustments