How do you extract the info from an RF Rx module (like garage door opener) ?

Hi all,

I've been experimenting with receiver circuits and I'm missing something.
The LC receiver I have (one of Ming's) and the Microchip (433.92 MHz,
rfRXD0420) seem to have noise at the output when they're not receiving a
signal. I see the signal (on a scope) when I press a button in the
respectively transmitter. But if I have this signal apply to the input of a
micro, it looks like I'm going to decode something (wrong) all the time
because of the noise. Shouldn't the output pin be low until the pulses are
demodulated by the receiver ? So that a high or low transition could be used
to trigger an IRQ and decode the signal ? As I said before... it looks like
I'm missing something in between the RX module and the MPU.

Could someone shed some light into my information gap please ?

Thanks


.