, automatic sounding
is the testing of selected channels or paths by providing a very brief beacon-like identifying broadcast that may be used by other stations to evaluate connectivity, propagation
, and availability
, and to identify known working channels for possible later use for communications
Note 1: Automatic soundings are primarily intended to increase the efficiency of the automatic link establishment (ALE) function, thereby increasing system throughput.
Note 2: Sounding information is used for identifying the specific channel to be used for a particular ALE connectivity attempt.
Source: from Federal Standard 1037C and from MIL-STD-188