[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: AM demodulation
From: |
CEL |
Subject: |
Re: AM demodulation |
Date: |
Mon, 28 Oct 2019 23:46:53 +0000 |
Hi Barry and Bill,
> I don't know how wide a spectrum the PLL can handle.
Generally, that's not really inherently limited by anything but the
loop bandwidth.
It's a really simple PLL, with a complex sample-argument phase
detector.
In other words: if you set the loop bandwidth too high, the PLL will
jump around like crazy in the presence of noise, or might lock onto
data instead of carrier.
Pick a bandwidth too small, and it won't be able to ever lock to even
the cleanest carrier if it's further away. It also won't be able to
"follow" a changing carrier frequency (might be pretty relevant for
satcom, if it's not geosync.
Best regards,
Marcus
smime.p7s
Description: S/MIME cryptographic signature