Are you talking about VIL and VIH?
If so that means there have to be a 2V swing...

Thats to tell if its high or low, im not sure this is the same thing.
I have seen many other people using pics to decode the signal from a R/C receiver. The output of the receiver signal, the pulse width is no where near even half a volt.


I have done this with a 270mV signal on over 50 chips so im either really lucky or something else.


Again im new to all this but like I said I have never had any problems reading a pulse width off a rc receiver and thats at 270mV