Q-Lite Satellite Modem Installation and Operating Handbook
6-106
Figure 6-59 BER Test Generator/Analyser Screen
Data Invert
allows an inverted data bit stream to be transmitted (or received if selected on
the analyser).
The
Inject Error
button can be used to inject a single error into the bit pattern, which
should increment the number of bit errors by one.
The
Cyclic Error
forces a single error to be injected periodically. The frequency can be
selected from a drop down box (in bits) which appears once the cyclic error is selected.
The
Elapsed Time
indicates the time since the test was started or restarted.
The
Errors
field indicates the total number of error bits detected since the test started.
The
Average BER
field indicates the number of bit errors in relation to the number of bits
received.
Latency
is shown in terms of both bits and time.
The
Sync OK LED
shows the instantaneous test pattern synchronisation status. When
the Rx path is synchronised to the incoming Tx test pattern then the LED will be green
and it will be red when synchronisation is lost.
The analyser
Sync Lost Threshold
can be customised or left as
Auto
. The
Counter Action
on Sync Loss
can be set to
Reset, Continue
or
Freeze
allowing further customization of
the display.
The
Restart
button can be used to start or restart the BER test including clearing all of the
error counts.
