Re: Variations on XTAL clock AND time synchronization

From: Robert Scott (no-one_at_dont-mail-me.com)
Date: 02/19/05 

Date: Sat, 19 Feb 2005 18:49:41 GMT

On Sat, 19 Feb 2005 18:38:17 -0000, dplatt@radagast.org (Dave Platt)
wrote:

>The PPS pulses are infrequent enough, and subject to enough jitter,
>that the drivers will need to do a fairly significant amount of
>low-pass filtering before using the pulse information to calibrate the
>internal clock.

Not true. You can buy a GPS receiver that produces 1 PPS with hardly
any jitter at all. By using a PLL, a high-quality frequency standard
can and has been made. You don't need a lot of low-pass filtering in
that PLL.

-Robert Scott
 Ypsilanti, Michigan
(Reply through this forum, not by direct e-mail to me, as automatic reply address is fake.)

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