COMPONENT MAINTENANCE MANUAL
1152682
Page 20
Oct 27/06
© Honeywell International Inc. Do not copy without express permission of Honeywell.
23-24-02
• 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.
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