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RF Section Troubleshooting
Troubleshooting
NOTE High Band #2 RF signal path utilizes a high band mixer internal to the A13 RF
Front End Assembly for RF input frequencies from 13 GHz to 26.5 GHz. Since
all the control voltages and biasing were already fully tested, failures from 13
GHz − 26.5 GHz will most likely be caused by the A13 RF Front End Assembly.
If the failure is amplitude related, proper adjustments such as frequency
response and the YTF Preselector adjust should be performed first before
changing the A13 RF Front End Assembly. Refer to Chapter 11, “Block
Diagrams.” for details.
In order to gain access to the front end components, remove the side chassis
(1). See Figure 4-21.
Figure 4-21 Remove the Side Chassis
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