[USRP-users] GPSDO and USRP Clock

Perelman Nathan (Nathan) nperelman at LGSInnovations.com
Mon Feb 11 19:43:10 EST 2013


Sorry, by clock I meant the time registers on the USRP (what is set by
calling set_time_next_pps()).

 

From: USRP-users [mailto:usrp-users-bounces at lists.ettus.com] On Behalf
Of Nick Foster
Sent: Monday, February 11, 2013 7:06 PM
To: usrp-users at lists.ettus.com
Subject: Re: [USRP-users] GPSDO and USRP Clock

 

On 02/11/2013 03:51 PM, Perelman Nathan (Nathan) wrote:

	How accurate is the USRP clock once it has been synced to the
GPSDO? Is there a need to periodically re-sync it? While the 10 MHz
clock on the GPSDO is warming up is it causing the clock to drift away
from GPS time?


When the GPSDO clock is selected as the reference source, the USRP main
oscillator is phase-locked to the GPSDO 10MHz reference. There is no
drift and no necessity to resynchronize while the USRP is operating.

--n



Thanks.

-Nathan Perelman






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