Intercontinental Technologies Ltd F22-24E0032 ユーザーズマニュアル

Chapter 12 

The most important components of the receiver are the Receiver/Decoder Module, the Relay printed 
circuit board, the LED printed circuit board, the EEPROM, the Mainline Indicator printed circuit 
board, and the Run/Test Switch. 
 
12.2.1 Receiver/Decoder Module 
 
This module combines a narrowband FM receiver, the frequency of which is digitally synthesized, 
with a decoder circuit, which converts the audio signal from the receiver to a serial data stream of 
relay commands.  It contains a micro-controller, which examines the incoming signal and 
determines, by means of 
the security code and 
other information, 
whether it contains valid 
commands to change the 
state of the relays.  It then 
issues these commands to 
the Relay PCB. 
 
12.2.2 Relay PCB 
 
This module latches the 
serial relay command 
data and drives the output 
relays.  It also contains 
the power supply for the 
rest of the receiver. 
 
12.2.3 LED PCB 
 
This module displays the 
state of all of the 
receiver’s relays by 
means of green LEDs 
(see Figure 10).