Hey guys, For school I have to study the zero-crossing demodulation method of reconstructing an FM signal. So far what I've been reading has been confusing me a bit and I have a few questions to ask: 1) How does a LP-filter act as a "time averager" for a train of impulses? 2) Does the resultant signal after LP-filtering resemble the original message signal? Is it DC shifted or amplified at all? If it is DC shifted how can you get rid of that? thanks guys.