Emergency Locator Transmitter

The ELT supplies these signals:

· ELT ON

· LIGHT

· RF OUT (2).

The ELT ON and LIGHT signals go to the ELT control panel. The ELT has two transmitter sections, one for the 121.5/243.0 MHz signal, and one for the 406 MHz signal. The two transmitter sections send the RF emergency signals to the ELT antenna on different transmission lines.

The ELT receives these signals:

· EXT ON

· RESET 1 and RESET 2.

The EXT ON signal from the control panel manually starts the transmitter.

The reset signals stop the transmitter if it accidentally starts. A G-switch enable jumper wire arms the ELT when you connect the front connector.

ELT Antenna

The ELT antenna sends the emergency signals on the VHF and UHF frequencies.

Purpose

The emergency locator transmitter (ELT) control panel lets you monitor and do a test of the ELT.

Indication

The ELT control panel has an ELT light. The light comes on when the ELT transmits.

Control

The ELT control panel switch has an ON and an ARM position. The ON position manually turns on the transmitter. The ARM position is the normal position for flight.

The switch has a guard to keep it in the ARM position.

Purpose

The emergency locator transmitter (ELT) sends emergency signals when it sense excessive change in velocity.

Power

The transmitter operates with four D-cell, lithium manganese dioxide batteries. The transmitter does not use airplane power.

Front Panel

The ELT front panel has a switch and an ON indicator.

The front panel switch has two positions. The ON position manually turns on the transmitter. The OFF position is the normal position. When the switch is in this position, the transmitter starts when one of these occurs:

· Large change in velocity

· ELT control panel switch is in ON position.

The ELT ON indicator flashes when the transmitter is on.

The antenna connectors connect the ELT to the antenna.

The remote switch connector connects the ELT to the ELT control panel.

TRANSMITTER

Purpose

The emergency locator transmitter (ELT) antenna sends radio signals in the very high frequency (VHF) and ultra high frequency (UHF) ranges.

Дата добавления: 2015-10-24