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