Reference Manual

Table Of Contents
The Control List
212 2110 SSB Transceiver Reference Manual
The ALE LQA Average entry enables you to select the averaging method used. If you
want to:
disable the averaging feature and replace the old results with the new results, select
New
retain 75% of the old results and 25% of the new, select Mainly old
retain 87.5% of the old results and 12.5% of the new, select Old
replace the old results with the average of the old and new results, select Both
ALE LQA Clear
Use the ALE LQA Clear entry to clear the LQA information in the transceiver. If a large
amount of information is stored this may take a few minutes. If a significant change has
occurred to the transceiver, the ALE LQA information will adapt more rapidly to the
new environment if the information is cleared.
ALE LQA Decay
When your transceiver periodically records the quality of the channels in your network it
stores the results for future use. Several factors can affect the accuracy of these results
including:
an insufficient number of ALE sounding transmissions being made in your network
an insufficient number of ALE calls being made (which prevents the transceiver
from exchanging channel quality information with other transceivers)
stations moving their location
antenna loading, nearby physical structures and local noise for stations mounted in
vehicles
These factors can lead to the deterioration of good channels going unnoticed. To avoid
this, use the ALE LQA Decay entry to artificially decay channel quality information
over time. This forces the transceiver to continually work against the artificial decay to
maintain an accurate picture of channel quality that does not overestimate actual
conditions.
For mobile stations the recommended decay period is 1–4 days. For base stations it is
15–30 days.
If you do not want to use this feature, select Disabled.
CAUTION
LQA information gathered by the initiating station during a Channel Test
call in an ALE/CALM network is not averaged according to the ALE
LQA Average entry. This new information replaces any information
stored for the channels and stations detected during the call.
LQA information gathered by the receiving station during a Channel Test
call in an ALE/CALM network is averaged according to the ALE LQA
Average entry for that station.