[time-nuts] Some More questions

Rob Kimberley time.bandit at btinternet.com
Thu Jan 19 14:28:33 EST 2006


Further to my last email, please see the attached GPS Timing block diagram.

Cheers

Rob K 

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Matt Ettus
Sent: 19 January 2006 19:01
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Some More questions

On 1/19/06, Hal Murray <hmurray at suespammers.org> wrote:
>
> > Then, I am not sure all GPS receivers actually use their internal 
> > crystal oscillator in a PLL as the timebase. I have read that some 
> > work  by removing or adding pulses in a discrete fashion rather than 
> > phase  locking, and this offers significant jitter, making the 1 PPS 
> > only  useable to phase lock a reference oscillator with a very long 
> > integration period to eliminate the jitter.

To my knowledge, nobody tunes the frequency of the oscillator in their GPS
receiver.

Matt

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