RF Troubleshooting Procedures
27
7. The next step is to identify where the problem lies
in the system. This can be done by changing the
frequencies in both transmitters and receivers, to
isolate a fault in a single channel, given there is at
least one other good channel. The possibilities are:
–
faulty transmitter
–
faulty receiver
–
bad frequency
The following procedure determines the method for
using changing frequencies to isolate problems.
Given:
1. One known bad channel, consisting of:
–
Frequency 1
–
Transmitter A
–
Receiver A
2. One known good channel, consisting of:
–
Frequency 2
–
Transmitter B
–
Receiver B
Isolate:
The fault to Frequency 1, Transmitter A, or Receiver A.
This procedure requires using the Telemetry Service Tool
or Wave Viewer to change transmitter frequencies, and
the Central Station to change receiver frequencies. The
Telemetry Service Tool can be used to change both the
transmitter frequencies (
trtool
) and the receiver
frequencies (
mftool
).
Step 1. Change the transmitter frequency of Transmitter
A to the frequency of the known good channel
(Frequency 2). Change the transmitter frequency of
Transmitter B to the frequency of the bad channel
(Frequency 1). Observe what happens:
a. If the problem remains with Transmitter A,
Transmitter A is faulty and should be repaired.
quickref.fm Page 27 Wednesday, June 5, 2002 3:08 PM
