JVC infrared remote protocol |
The JVC infrared remote protocol is almost equal to the daewoo protocol. | |
It are just the timings and the spacer between the address and data bits who differs a little bit. | |
By the JVC protocol a logical 0 bit exists of a high puls with a duration time of 600 µs followed | |
by a low puls of 550 µs this. | |
A logical 1 bit is formed by a high on time of 600 µs followed by low signal of 1600 µs. | |
The carrier frequency of the infrared signal is 38 kHz. When you will decode the signal with an | |
integrated receiver module you need a receiver module wich is tuned on 38 kHz like the TSOP1838 | |
fabricated by Vishay. It will function also with a 36 kHz module but the sensitivity is less than by a | |
38 kHz module. | |
Because the receiver (mostly in hobby applications a microprocessor) needs to trigger on a new | |
received code the protocol starts with a start bit of 8ms high level pulse and a 4 ms low level pulse. | |
After this the 7 address bits and 7 command bits are transmitted. | |
Terminating the protocol is done with an another high level signal of 600µs. | |
The time between two startbits of bitstreams when the button on the remote control is being pressed = | |
60 ms but the start header is only once transmitted in the beginning of the keypress. | |
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