RF Troubleshooting Procedures
24
RF Troubleshooting Procedures
This section deals with troubleshooting problems in the
RF portion of the Telemetry System. With RF, a variety of
problems can result in the same symptom and a variety
of symptoms can be the result of one problem.
INVALID SIGNAL E01INOP
This INOP is a special case of interference that indicates
that the receiver has locked on to a M2601A transmitter,
but the ID code the transmitter is broadcasting does not
match the ID code stored in the receiver mainframe. If
the message appears when a battery is installed in the
corresponding transmitter, the Learn Code procedure
must be performed.
If the message only appears when the corresponding
transmitter does not have a battery installed, there is
another M2601A transmitter broadcasting nearby, at the
same frequency. The frequency of one of the channels
should be changed.
How does the transmitter-receiver pair recognize each
other? Each transmitter sends out an ID code or “spoof
code” that uniquely identifies it to a receiver module.
When the receiver module receives a signal at its set
frequency, and ID code matches, the receiver module
accepts the signal. If the ID code does not match, the
INVALID SIGNAL E01
INOP is generated.
quickref.fm Page 24 Wednesday, June 5, 2002 3:08 PM