User's Manual

TS4000 Radio Modem User’s Manual Testing 41
The longer a BER test runs the more accurate the result. To get an accurate
result a BER test should be run until at least 100 errors have been received. This
provides a 90% confidence level in the BER value. However, in a relatively error
free environment this can take a very long time. An alternative is to run the BER
test until at least 10 errors have been received which provides a 68% confidence
level.
AirTest can be setup to run a BER test. To run a BER test, the TS4000s must be
configured with packet operation disabled. This is because when the TS4000 is
setup for packet operation it discards corrupted packets and does not send them
out the serial port.
1) Attach two TS4000s each to a PC serial port.
2) Setup AirTest for the correct serial port baud rate, data bits and parity
(matches the TS4000’s setting).
3) Select and start one of the automated tests. To select a test, use the Test
Setup command from the Setup menu. Use the on-line help for details about
the different tests.
4) Wait and observe the results.