Edson Brusque wrote:

> Hello,
>
>     I'm testing some transmiters and receivers modules (315MHz e
> 434MHz) from Keymark (www.keymark.com.tw). Transmiters are TXC1-0315 and
> TXC1-0434. Receivers are RXD1-0315 and RXD1-0434.
>
>     What I'm founding strange is that the receivers output random noise
> when the transmiter is OFF (or ON with data pin low).
>
>     This is ok? Am I doin something wrong?
>
>     It seens the receiving routine would need to ignore all this noise.
> I think it would be complex. Any good documents on this subject I should
> read before doing dumb questions?


This is perfectly normal with typical receivers. I have a product
at the moment that I use a MC145027 to decode a remote and
drive the PIC with the data. That's only convenient now because
I only need the 1-of-4 button data from a set remote address.
The decoder chip just gives me a "data valid" line and the data.
When I want to decode the address as well I'll have to decode
the data from the receiver module bit by bit. (maybe using int0)
David...

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