Setup procedures (part 1)
5-6 9390 Reference manual
Call Retry Limit (ALE option 13)
This ALE option controls the number of times the ALE
station tries to establish an ALE link using each channel in
turn from the scan group.
You can set 99 for no limit or a value in the range 0–98.
On each selected channel, two attempts are made to establish
a link before trying the next preferred channel, where two
more attempts are made and so on, until all channels in the
scan table have been tried (unless a link is established).
The sequence is then repeated dependent upon the number set
in the Call Retry Limit.
If a link is not established, the display shows ‘
LINK FAILED
’
accompanied by error ‘beeps’. Retry duration can be up to
one minute per channel.
Channel Quality Averaging (ALE option 14)
This ALE option sets the method used to update an existing
channel quality value stored in ALE controller memory when
the new channel quality reading is worse than the stored
value.
You can:
• replace old values with new readings
• replace old values with different weighted averages of the
old values and new readings.
Averaging reduces the effect that one bad reading might
otherwise have on a perfect channel. If a new reading is better
than an old value, the old value is replaced by the reading.
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