SETTINGS
SETTINGS > CALLING > ALE
E
NVOY™ TRANSCEIVER REFERENCE MANUAL 239
ALE LQA Average
The ALE LQA Average entry selects the way that LQA information is used when
recording signal quality.
When the transceiver periodically tests the quality of the channels in an HF network,
it stores the results for future use. The transceiver uses an averaging method to reduce
the effect that the new reading may have on the current channel values. 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
• replace the old results with the average of the old and new results, select Both
• retain 75% of the old results and use 25% of the new, select Mostly old
• retain 87.5% of the old results and use 12.5% of the new, select Old
Default value: Both
CAUTION: LQA information gathered by the calling station during a Channel Test
call in an ALE/CALM HF network (MIL-STD-188-141B ALE option)
replaces any information stored for the channels and stations detected
during the call.
ALE LQA Decay
The ALE LQA Decay entry sets the length of time it takes for LQA information to
artificially decay, or switches off this feature.
When your transceiver periodically records the quality of the channels in an HF
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 the HF
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, the ALE LQA Decay entry artificially decays 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.
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