•
Master Processor functionality
•
121/243/406 MHz RF output power levels
•
RF Antenna Port termination
•
Battery functionality
B. AIM
•
AIM Memory check
•
Memory transfer from AIM to Transmitter Unit
C. NAIM
•
NAIM memory check
•
Memory transfer from NAIM to Transmitter Unit
•
NAV data
D. 24-bit DIP Switch Module
•
Settings, not all 0s or 1s
E. Remote Panel
•
Front Panel switch/circuit functionality
•
LED/drive circuit functionality
•
Aircraft wiring between Remote Panel and Transmitter Unit
11.
Circuit Description
The transmitter unit is the major component of the ELT system. The unit senses a crash and
automatically generates the 121.5/243 and 406.028 MHz signals. The transmitter unit consists of the
following major components:
•
RF Module
•
Interface Circuit Card
•
Power Circuit Card
•
Battery Pack
A. RF Module
The RF Module generates three RF signals at 121.5, 243, and 406.028 MHz. The three RF signals
are controlled by a microcontroller on the RF Module.
© Honeywell International Inc. Do not copy without express permission of Honeywell.
COMPONENT MAINTENANCE MANUAL
1152682
23-24-02
Page 20
Oct 27/06