All Yto Loop Service Position - HP 8566B Adjustment Manual

mounting hole located on the chassis divider next, to the AlOAl
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.
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
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
16. YTO Loop Adjustments
Adjustments 3-137