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16. YTO Loop Adjustments
mounting hole located on the chassis divider next, to the
VCO Assembly.
Figure 3-71. All YTO Loop Service Position
6. Remove the SMA 50 ohm termination from the RF Section
frontpanel
LO OUTPUT connector. Install the termination on
the YTO OUT connector of Al
CIA Assembly.
Al
6.20
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
6.20
Filter/Attenuator/Cable
Assembly from the COUPLED OUT connector of
CIA
Assembly. See Figure 3-71 for the location of AllA7.
8. Carefully unclip
from the YTO Loop cover allowing the
cable’s free end to be moved to one side.
9. Connect the SMA
end of
to the COUPLED OUT
connector of
CIA Assembly.
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
(on the COUPLED OUT connector of
CIA Assembly).
11. On the RF Section, adjust
GATE BIAS ADJ fully
counterclockwise. See Figure 3-71 for the location of
12. Press
on the second spectrum analyzer. Set the controls
of the second spectrum analyzer as follows:
START FREQUENCY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
STOP FREQUENCY . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjustments 3-137