HP 8566B Adjustment Manual page 291

29.
Set the controls of the second spectrum anaiyzer as follows:
CENTER FREQUENCY . . . . . . . . . . . . . . . . . . . . . . . . . 165 MHz
FREQUENCY SPAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15 MHz
RES BW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 kHz
REFERENCE LEVEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -7 dBm
LOG SCALE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .I0 dB/DIV
MARKER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . OFF
30. Press ) on the synthesized sweeper, and key in @
PRESET
(
330.3 MHz,
POWER LEVEL
31. Use a second BNC to SMB Snap-on Test Cable and an SMB adapter
to connect the cable 4 (yellow) from AlOA3Jl IN 200-300 MHz to
the RF OUTPUT of the synthesized sweeper.
32. Set the RF Section LINE switch to ON, and key in L-j,
( )
42.57 MHz,
CENTER FREQUENCY
Adjustments AlOA3Lll 165 MHz NULL, AlOA3L12 160 MHz NULL,
and AlOA3L13 170 MHz NULL are sealed at the factory and normally
do not require readjustment unless a component failure has occurred.
33. Adjust AlOA3Lll 165 MHz NULL, AlOA3L12 160 MHz NULL, and
34.
Adjust AlOA3Ll3 170 MHz NULL to minimize the amplitude of
the 170 MHz signal displayed on the second spectrum analyzer.
Refer to Figure 3-78 for the location of AlOA3L3 170 MHz NULL
adjustment.
35.
On the synthesized sweeper, key in Icw) 325.3 MHz.
36. Adjust AlOA3Lll 165 MHz NULL to minimize the amplitude of
the 165 MHz signal displayed on the second spectrum analyzer.
Refer to Figure 3-78 for the location of AlOA3Lll 165 MHz NULL
adjustment.
37. On the synthesized sweeper, key in Icw) 320.3 MHz.
38. Adjust AlOA3L12 160 MHz NULL to minimize the amplitude of
the 160 MHz signal displayed on the second spectrum analyzer.
Refer to Figure 3-78 for the location of AlOA3L12 160 MHz NULL
adjustment.
39. On the synthesized sweeper, key in Icw] 260.3 MHz.
40. On the second spectrum analyzer, press
MHz
SPAN
marker on the peak of the displayed 100 MHz signal, and verify
that the output power level of the PLLl IF is at least -14 dBm.
If it is not, a lower value can be selected for factory-select
component AlOA3C26 to improve the impedance match between
the double-balanced mixer AlOA3Ul and the IF Input Amplifier
circuit on AlOA3 PLLl IF Assembly. Refer to Table 3-3 for the
acceptable range of values for AlOA3C26, and to Table 3-4 for HP
part numbers; refer to Figure 3-78 for the location of AlOA3C26.
41. On the synthesized sweeper, key in
17. 20130 Loop Phase Lock Adjustments
)
0 dBm.
(
FREQUENCY SPAN
[
CENTER FREQUENCY
)
6 MHz MARKER
[
START
)
0 Hz.
)
100
)
to position a
SEARCH
300.3 MHz.
Adjustments 3-151