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Setup procedures—Part 1

HF SSB transceiver reference manual 5-7

Sounding On/Off (ALE option 0)

This ALE option switches on or off sounding.

When sounding is switched off, your transceiver no longer

sends or receives ALE sounding signals. For correct ALE

operation, you should leave sounding on all the time.

If ALE Silent Mode (ALE option 11) is switched on, the

Sounding On/Off option setting is ignored and your station

does not send or receive ALE sounding signals. To set the

sounding interval, see ALE Sounding Interval on page 5-13.

Channel Quality Decay Time (ALE option 2)

This ALE option sets the artificial decay time for the record

of channel quality that is stored in the channel quality table

in ALE controller memory.

You can switch off decay or set a decay time in the range

1–8 hours.

For example, switching the sounding off and setting a decay

time of four hours would result in the record of a perfect

channel (100% channel quality) decaying to an unusable

channel (0% channel quality) over a period of four hours.

Sounding Signal Length (ALE option 3)

This ALE option sets the length in seconds of the sounding

transmission for each channel in the scan group.

When an ALE station sends sounding signals, a separate

signal is transmitted for each channel in the scan group. The

ALE station sends these signals sequentially. The total

length of the sounding transmission is the product of the

sounding signal length and the number of channels.

For example, if the sounding signal length is set to 10

seconds and the scan group contains seven channels, the

ALE station takes 70 seconds to complete sounding

transmission.