Plastic Remote Control 31keys For SKY/ Virgin/ Humax/ My Box/ Zing Digital/ Asianet Digital Tv Set Top Box
The plastic remote control 31 keys could use NEC infrared agreement . many clients when they place the procution order to us . very ofen forgot to share with us the NEC agreement . so i would like to make a breifly introduction if it for the convinence when clients place order in the future .
Characteristics of NEC protocol
1. 8-bit address and 8-bit instruction length;
2. Address and Command 2 transmission (ensure reliability)
3. PWM pulse position modulation, with the duty ratio of transmitting infrared carrier representing "0" and "1";
4. The carrier frequency is 38kHz;
5. The bit time is 1.125ms or 2.25ms