Product Specs

MOTOTECH CO., LTD.
Title Certification Request Document
Project Name C300 Drawn 2018-11-08
Model Name
Released 2018-11-08
Made by J.Y.HAM
4
NAME
Wireless controller about wireless electronic equipment of
specific low output radio station
Equipment List RF Transmitter, LF Receiver
Frequency RF : 433.920MHz, LF : 125KHz
Antenna composition Pattern ANTENNA, LF ANTENNA
Oscillation method Crystal oscillation
Modulation method FSK
Communication method Two-Way Communication
Frequency multiplier 32 multiplier
Working voltage DC 3.0V(Li-ion Battery CR2032 x 1EA)
4. Repair of Unit & Circuit Explanation
4.1 Repair of Unit
- Exchange an old unit.
4.2 Circuit Explanation
- If User presses specific Switch of transmitter, MCU(U1) makes inherent serial value
and encryption value, so it is transmitted to the FSK&ASK pin of TX_IC, at the same time,
TX_IC gets to be ENABLE.
- Printing data are falsified into Tx_IC and it synthesize through crystal(X1). synthesized
frequency is multiplied and amplified by Tx_IC, it transmits through pattern antenna
from output matching circuit.
- FOB receives random data through LF Antenna and prints to encrypt result value from
MCU, at the same time TX_IC get to be ENABLE. As following, it transmits pattern
antenna how to change falsification, synthesis, and multiplier.
5. The Method of Unit Operating
5.1 REMOTE OPERATING METHOD