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15. M/N Loop Adjustments
14. Adjust the AMPTD CAL control on the second spectrum analyzer
for a -10.00
displayed signal, and then press (SHIFT)
(
F
RE
QUENCY
15. Set the controls of the second spectrum analyzer as follows:
16.
17. Set the RF Section LINE switch to ON.
CENTER FREQUENCY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MHz
FREQUENCY SPAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 MHz
REFERENCE LEVEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LOG SCALE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . dB/DIV
Disconnect the cable 9 (white)
from
on the
M/N Output Assembly. Refer to Figure 3-68 for
the location of
and
Use an SMB
male-to-male adapter and a BNC to SMB Snap-on Test Cable to
connect the white cable to the input of the second spectrum
analyzer.
Damage might occur to the M/N VCO tuning diodes on
M/N
Output Assembly if a positive voltage is applied to
TUNE
test point.
18. Set the dc power supply for an output of -35.0 0.5 Vdc.
Connect the positive lead of the dc power supply to the RF
Section chassis (ground). Then, connect the negative lead to
TUNE test point.
19. Adjust
PWR for an M/N VCO output level of 0.0
2.0
as indicated on the second spectrum analyzer
display. Refer to Figure 3-68 for the location of
PWR adjustment.
20. Slowly reduce the output voltage of the dc power supply from
-35.0 Vdc to -2.3 Vdc while monitoring the M/N VCO output
level displayed on the second spectrum analyzer. The M/N VCO
output level at
should be greater than -2.0
between 355 MHz (-2.3 Vdc) and 395 MHz (-35 Vdc).
21. Set the RF Section LINE switch to STANDBY.
22. Reconnect the white cable to
on the
M/N Output
Assembly, and then reinstall the
Output Assembly in
the RF Section. Reconnect the cable 92 (white/red) to
355-395 OUT.
23. Repeat steps 5 through 11.
24. Reconnect the cable 93 (white/orange) to
M/N OUT.
25. Remove the LOCK INDICATOR DISABLE jumper from
and
Disconnect the frequency counter from the RF
Section rear-panel FREQ REFERENCE INT connector, and
reconnect the short jumper cable between the FREQ REFERENCE
INT and EXT connectors. Set the RF Section rear-panel switch to
INT.
3-134 Adjustments
Содержание HP 8566B
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Страница 137: ...Test 19 1st LO Output Amplitude Steps Min Measured Max 4 1st LO OUTPUT Level 5 dBm 2 112 Performance Tests ...
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Страница 351: ...23 Track and Hold Adjustments 25 Repeat steps 4 through 24 until no further adjustments are required Adjustments 3 211 ...
Страница 404: ...AIVI Wi AlAl ti2 W8 Figure 6 6 IF Section Front View 6 8 Major Assembly and Component locations ...