Test Set Operation
Subject to Export Control, see Cover Page for details.
2 - 46
2.5.4
Message Screen
Fig. 2-54 Message Screen
This screen displays the decoded information from the ELT beacon signal. The specific
fields displayed will depend on the beacon protocol us ed by the analyzed beacon.
Message:
The entire received message after the initial synchronization bits, displayed in hex.
This will be 120 bits for a long format message or 88 bits for a short message.
B e a c o n I D:
The 15-hex digit beacon identification code. (T his consists of the 60 bits following the
first message bit which specif ies the long or short beacon format.)
Country:
The country of origin of the beacon, displayed both in text and as the Maritime
Identific ation Digits assigned by IT U.
Pro tocol :
The label of this field will change to denote whether the beacon is using a standard
location protocol, national location protocol, us er protocol, or user location protocol.
The field contents will show the specif ic pr otocol used. For example, a "Standard
location protocol" with "ELT - address" denotes an ELT beacon specif ying a 24-bit
aircraft address and a location.