how does a PULSE code MODULATION WORKS?
When I press a button in my IR transmitter it will send binary codes example.
1 1 1 0 with a 38 KHZ carrier.
The IR receiver device will detect the 38 KHZ ( with the filtered code, 1 1 1 0) and will let it pass.
BUT how does the device know where to put the 1 1 1 0 code? does it have some sort of low pass filter or something ?
http://www.tpub.com/neets/book12/0217.GIF
When I press a button in my IR transmitter it will send binary codes example.
1 1 1 0 with a 38 KHZ carrier.
The IR receiver device will detect the 38 KHZ ( with the filtered code, 1 1 1 0) and will let it pass.
BUT how does the device know where to put the 1 1 1 0 code? does it have some sort of low pass filter or something ?
http://www.tpub.com/neets/book12/0217.GIF