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different protocols on same IR reciver...does it work?


Sudip Midya

Jan 1, 1970
Hi Everybody,
I am working on RMAP protocol.I have a decoder which can decode RMAP
and MIT protocol.
This decoder works on RMAP protocol when the IR receiver is
R3302,IR_REC_V_56KHz_TSOP2256VI1(not sure who is the manufacturer).
The decoder also works on MIT protocol,when the IR receiver is
TSOP1133(dont know who is the manufacturer).

(1)Since the decoder works fine for both the protocols at different
receivers, so I am sure that the decoder is working fine(else it
wouldnt have worked at all).
I want to make the decoder work for RMAP protocol also, when the
receiver is TSOP1133(the second case) this scenario, it's now
working only for MIT.

I want to know:
(a)Should the IR receiver work for all the protocols? If not why and
what are the factors that prevent it from working.
My Guess: If the carrier frequencies for the protocols do not match,
maybe the IR receiver wont be able to decode it. Is this true? where
can I find more information about it?

(b)What is the carrier freq's for RMAP and MIT protocol?
My confusion: Do the carrier freq depend on the protocol or the remote
control itself?

If anybody is having domain knowledge on this, pls pls respond soon.