Detailed Answer
The working principle of an industrial remote control is a closed-loop process: the transmitter encodes button states into digital signals → modulated and transmitted via the antenna → the receiver antenna captures the signal → demodulation and decoding → restore the control commands → drive relay outputs → control motor operation. Encoding methods include fixed coding, rolling coding, and learning codes, with rolling coding being the most secure. LDER uses the 470MHz band plus frequency-hopping spread spectrum, so multiple units on the same site do not interfere with each other, with stable communication over 200 m.
| Process | Encode → transmit → receive → decode → output |
| Encoding | Fixed / rolling / learning code |
| Anti-interference | FHSS frequency hopping |
Note:Understanding the working principle helps quickly troubleshoot signal-type faults.