User's Manual

MDS 05-4121A01, Rev. 02 TRM SB Integration Guide 23
b. Set the receive frequency with the RX xxx.xxxxx command.
Press after the command.
c. After programming any parameter,
PROGRAMMED OK will be
displayed to indicate a successful entry.
8. Review and reprogram any other parameters as necessary to
complement your system requirements. (See Table 5 on Page 19 for
a list of all user commands.)
9. Optimize the antenna installation by measuring the received signal
strength of the other station with which this station will be
communicating. Monitor the TRM SB’s RSSI level. Rotate the
station antenna until the signal is the strongest. The less negative the
value, the stronger the incoming radio signal.
The received signal should be at least –90 dBm. This value will
provide a safety margin (fade margin) to prevent loss of
communications through signal reduction (fading) caused by
weather conditions, changes in station location if mobile, or other
obstructions temporarily positioned between communicating
TRM SB stations.
10. Disconnect the terminal interface and the ground from Pin 11 from
the
DATA INTERFACE connector.
11. Connect the data equipment to the transceiver’s
DATA INTERFACE
connector and test for normal operation.
4.0 TROUBLESHOOTING
Successful troubleshooting of the radio system is not difficult, but it
requires a logical approach. It is best to begin troubleshooting at the
master station, as the rest of the system depends on the master for
polling commands. If the master station has problems, the operation of
the entire network can be compromised.
It is good practice to start by checking the simple things. For proper
operation, all radios in the network must meet these basic requirements:
• Adequate and stable primary power.
• Secure connections (RF, data, and power).
• An efficient and properly aligned antenna system with a good
received signal strength (at least –90 dBm). It is possible for a
system to operate with weaker signals, but reliability may be
degraded.
ENTER