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OVERVIEW
The demo’s main objective is to show the IA4420’s capability to monitor multiple frequencies, receive data from an FSK
transmitter, and then re-transmit this data on an another arbitrary frequency to another receiver or transceiver. This
demonstration is designed to show the IA4420 acting as a repeater node.
The Repeater Demo has three main components: the IA4420, which is the system radio, a C8051F311 type 8051
microcontroller, which controls the application, and a 2 line 16 character LCD, which informs the user of the repeater status
(Note)
.
The current version of the Repeater Demo is equipped with a 50 Ohm SMA connector for the antenna.
2
Fig. 1 Repeater Block Diagram
Note:Note:
Note:Note:
Note: LCD only available on some models.
Repeater function
Packet
Receiver
Packet
Builder
Packet
Transmitter
SW Uart Interface
LCD Interface
Serial
LCD
IA4420 control
Scheduler
SPI Interface
TX/RX buffer
Physical layer
IA4420
Controller
SPI Interface
ISM Transceiver
TX LatchFIFO
Software parts in C8051F311