Instruction Manual

Chapter Three Operation
Page 31
If a system gives poor performance after it is installed, check the adequacy of the radio path -
refer to the Diagnostics Section 6.
Interference will only cause a problem if the amplitude of the interference is comparable to the
radio signal from the WI-MOD-9-D units. If the interference level is relatively small, then it
will not affect the performance of the system. If interference is causing a problem, try to
improve the normal radio level by mounting the antennas higher or in a better location. This not
always possible.
System performance may be improved by changing the following parameters :-
• If in transparent mode, try controlled mode.
• If configured for a radio data rate of 115200 or 57600 bits/sec, reduce the rate to 19200
bits/sec.
• If large radio messages are being transmitted, reduce the maximum message length, and
transmit the data in more messages of smaller size.
Another common problem is the response time of the host software. Some hosts operate by
sending a message from one end and require a response to that message within a certain time. If
this time is less than the turn-around time of the radio modem, then the system will not operate.
It may be possible to lengthen the response time in the host software.