24 Jan
2014
24 Jan
'14
9:06 a.m.
On Jan 24, 2014 12:03 AM, "Chuck Guzis" <cclist at sydex.com> wrote:
But is there any point to that in modern gear? In
fact, why not a PLL to
synchronize the receiving clock? Return to mark level by the
center of the
bit cell should be more than adequate for most applications.
Because async has no defined timing relationship between characters. The
PLL would have to reacquire lock for every character, which generally can't
be done quickly enough., since characters don't individually have suitable
preambles.