b. If the problem moves to Transmitter B, the
problem is not in Transmitter A (transmitter of
the original bad channel). Proceed to Step 2.
Step 2. Because the problem is not in Transmitter A,
either Receiver A or the frequency itself is faulty.
To isolate between the two, first change the
receiver frequency of Receiver A to the frequency
of the known good channel (Frequency 2). Change
the receiver frequency of Receiver B to the
frequency of the bad channel (Frequency 1).
Observe what happens:
a. If the problem remains with Frequency 1, the
problem is in the frequency. The problem must
be further isolated to determine whether it is
in the antenna system or the RF Signal
environment. Either an Antenna System
Troubleshooting procedure or an RF History
Strip evaluation must be performed.
b. If the problem moves to Frequency 2, the fault
is in Receiver A. Before replacing the receiver,
check the following:.
— Make certain that the semi-rigid cable is
— If the semi-rigid cable is OK, then the
— If the problem follows the receiver, replace
— If the problem remains with the slot,
connected correctly and not damaged. If the
cable is suspected, swap it with one of the
other cables in the mainframe and see if the
problem switches to the other channel. If it
does, replace the cable.
receiver module is probably bad. Exchange
the receiver module with another one to
the receiver PCB.
replace the antenna distribution board in
the receiver mainframe.
RF Troubleshooting Procedures