LBI-39190
42
Excessive Error Rate
Problem
Corrective Actions
Excessive Error
Rate
1. Verify that both the radio and RF control stations are under RF coverage area and are
not being interfered with.
2. Verify that the channels are tuned correctly and that the antenna system is connected
properly.
3. Attempt to isolate the problem to a channel on the EDACS system.
4. If the excessive error rate is caused by “system busy” condition on the EDACS
system, reduce the traffic of simultaneous data calls when possible, or to add more
data-enabled RF channels.
5. Enable BREN, both in the radio and RF control station.
6. Verify that the SYSTEM.TXT Msg_Timeout value is long enough.
7. Verify that the SYSTEM.TXT Max_Msgs value is set high enough.
8. A major cause of excessive error rate is collision. In this case, reduce the amount of
the simultaneous two-way data calls when possible, or to partition the Data
Advantage ports into output and input ports. The radios send data calls only through
the input ports, and Data Advantage forwards data calls only through the output
ports. The direction of the Data Advantage ports is configurable in the
SYSTEM.TXT file.
9. Increase the number of retires, either in the radio or the Data Advantage. On the RDT,
change the number of ACKARetry command in the protocol.ini file. In Data
Advantage, increase the number of EDACS_Err_Retry in the SYSTEM.TXT.
10. Change the delay of the retries, either in the radio or the Data Advantage . On
the RDT, change the number of ticks for ACKA delay in the protocol.ini file.
On the Data Advantage side, change the second parameter of the EDACS_Err_Retry
command.
11. If Data Advantage has memory congestion, reduce the Max_Msgs and / or the
Msg_Timeout in the SYSTEM.TXT.
12. Verify that the RF control stations are programmed as Data Only radios. This will
prevent RF control stations from receiving voice calls.