User's Manual

MDS 05-2708A01, Rev. D MDS TransNET I&O Guide 45
Historical information on the quality of each zone can be accessed using the
ZONE DATA command. The report shows you the number of data frames sent,
the number received, and the number received with errors. If an excessive
number of errors are seen in one or more frequency zones, it may indicate
interference, and you should consider “skipping” those zones using the SKIP
command (See “SKIP [NONE, 1...8]” on Page 41).
Note: If a frequency zone has been skipped, all counts for that zone will be
zeros.
The ZONE DATA format is displayed as follows:
1:TX TOTAL 00000000
1:RX TOTAL 00000000
1:RX ERROR 00000000
x:
x:
x:
8:TX TOTAL 00000000
8:RX TOTAL 00000000
8:RX ERROR 00000000
All data is based on payload packets. Incoming network data may be divided
into multiple packets for over-the-air transfers. The number before the colon
represents the zone. TX TOTAL is the transmit packet total. RX TOTAL is the
receive packet total. RX ERROR is the total number of received packets with
CRC errors. All zone data is reset with the ZONE CLEAR command.
7.0 TROUBLESHOOTING
Successful troubleshooting of an MDS transceiver system is not difficult, but
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 instruc-
tions and synchronization data. If the Master station has problems, the oper-
ation of the entire network will be affected.
When communication problems are found, it is good practice to begin by
checking the basics. All radios in the network must meet these basic require-
ments:
• Adequate and stable primary power
• An efficient and properly aligned antenna system
• Secure connections (RF, data & power)
• Proper programming of the radio’s operating parameters, especially
Operating Mode (MODE), Network Address (ADDR), and interface
Baud Rate (BAUD). For TransNET 2400 check the sub-band (BAND).
• The correct interface between the radio and the connected data
equipment (proper cable wiring, data format and timing).
• In store-and-forward systems there are several areas that should be
checked or evaluated:
• Look for duplicate XADDR values on MODE M and MODE X radios.
Duplicates will cause failures unless the radios are too far apart to
hear each other.