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Potential RF Signal Problems
The RF section is designed to route and filter RF input signals. The RF section is
comprised of the following major assemblies.
The RF input signal can be routed through three different front end signal paths.
RF input frequencies from 9 kHz to 30 MHz are routed though the conducted filter
path. Refer to
RF input frequencies from 30 MHz to 1000 MHz are routed though the radiated
filter path. Refer to
There is also a filter bypass path.
SW1 and SW2 - Input Relay Switch Troubleshooting
For details on the functionality of these assemblies see
Descriptions".
Troubleshooting the Input relay switches is a two step process. First verify that the
switches are functioning correctly. If switches are not functioning correctly then
verify the switch control signal from the A23 Conducted Input Board. This will
allow possible mechanical problems to be isolated from possible control signal
problems.
The functionality of the Input Relay Switches can be verified by using the service
menu to switch between the "RF" and "Source" inputs and the "Bypass" and
"Filtered" signal paths along with a signal source and a signal analyzer.
The "RF", "Source", "Bypass" and "Filtered" RF signal relay switch paths can be
verified from the front panel connectors and by breaking the filtered RF signal path
by removing the end of Cable W7 and measuring the signal that is being routed to
the A21 Radiated Input Board Assembly
To access the service menu login as "advanceduser" and press
Service Code is -2061
The service and diagnostics menus can only be accessed by the Windows Login
NOTE
"advanceduser". For more information on accessing the service menu refer to
Chapter 5 , "Service and Diagnostics
Chapter 2
SW1 RF Input Relay Switch
SW2 RF Output Relay Switch
A21 Radiated Input Board Assembly
A22 Radiated Filter Board Assembly
A23 Conducted Input Board Assembly
A24 Conducted Filter Board Assembly
Chapter 4 , "Block Diagrams"
Chapter 4 , "Block Diagrams"
Potential RF Signal Problems
for details.
for details.
Chapter 3, "Assembly
Menus".
Troubleshooting
,
. The
System
Service
69
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Table of Contents
Troubleshooting
