Agilent Technologies HP 8566B Spécifications Page 277

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Vue de la page 276
16. YTO Loop Adjustments
mounting hole located on the chassis divider next, to the
AlOAl
PLLl
VCO Assembly.
Figure 3-71. All YTO Loop Service Position
6. Remove the SMA 50 ohm termination from the RF Section
frontpanel
1ST
LO OUTPUT connector. Install the termination on
the YTO OUT connector of Al 1Al CIA Assembly.
CIA
Gate
Bias
Adjustment
Note
Al lA7 6.20
GHz
Lowpass
Filter/Attenuator/Cable Assembly and
semirigid cable W 11 can both be damaged if the semi-rigid coax cable
is bent excessively in the following steps.
7. Disconnect Al
lA7
6.20
GHz
Lowpass
Filter/Attenuator/Cable
Assembly from the COUPLED OUT connector of
AllAl
CIA
Assembly. See Figure 3-71 for the location of AllA7.
8. Carefully unclip
AllA
from the YTO Loop cover allowing the
cable’s free end to be moved to one side.
9. Connect the SMA
male
end of
Wll
to the COUPLED OUT
connector of
AllAl
CIA Assembly.
(Wll
was removed from the
YTO OUT connector in step 2.)
10. Connect a low-loss microwave test cable to the RF INPUT of the
second spectrum analyzer using a Type N to APC 3.5 adapter.
Connect the opposite end of the cable to the SMA female end of
Wll
(on the COUPLED OUT connector of
AllAl
CIA Assembly).
11. On the RF Section, adjust
AllA2R2
GATE BIAS ADJ fully
counterclockwise. See Figure 3-71 for the location of AllA2R2.
12. Press
@ZZi$
on the second spectrum analyzer. Set the controls
of the second spectrum analyzer as follows:
START FREQUENCY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.2.2
GHz
STOP FREQUENCY . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.6.2
GHz
Adjustments 3-137
Vue de la page 276
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