Elta ADT 406 AF, User Handbook Manual

Page: 22 / 54

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Page 21
Feb 15/03
ELT ADT 406 AP aircraft components
(f)Remote control unit
The remote control unit integrated in the aircraft cockpit consists of :
– a RESET/TEST pushbutton,
– an ELT ON indicator light,
– a two-position ON/ARMED switch with safety cover (flip guard). The safety cover forces the switch to
ARMED position. This switch must always remain in this position, except in the case of manual
distress triggering.
The beacon is integrated in the aircraft as far aft as possible and so it must be connected to the remote
control unit. This remote control unit enables beacon operation to be forced to ON, to be tested (TEST)
or shutdown and restore in standby or ARMED mode (RESET) in the event of an untimely triggering of
the ELT, from the aircraft cockpit.
(g)External antenna
An external antenna is recommended to be installed on the fuselage of the aircraft to maximize
transmission of the distress signal to the satellites.
The cable lenght should remain as short as possible in order to RF keep losses as close as possible to
0.5 to 1 dB at each frequencies (121.5/243/406.028 MHz).