[time-nuts] GPS SDR (was: FE-.5680A trimming resolution)

EWKehren at aol.com EWKehren at aol.com
Wed Feb 1 19:26:14 UTC 2012


That is also what I like to understand, and when combined with a FE 5680A  
the time will be long and should be averaged over 100 if not 1000 samples, 
what  is the advantage? Look at the error budget.
Bert Kehren
 
 
In a message dated 2/1/2012 2:04:04 P.M. Eastern Standard Time,  
albertson.chris at gmail.com writes:

On Wed,  Feb 1, 2012 at 10:18 AM, Attila Kinali <attila at kinali.ch>  wrote:

> That said. I've contacted u-blox, but got a number that is  way out of
> what i've expected (approx 120CHF). I'm currently trying to  get a lower
> price.

What is it these u-blox device can do that a  cheaper Motorola Oncore
can't?   Depending on the version the  Oncore has for 50 to 5 nS
one-sigma error on the timing pulses and can do  either 1PPS or 100PPS.
Single unit prices are from $18 to $60 very  good documentation is
available.

If the u-blox was somehow much  better than a Trimble thunderbolt or
Motorola Oncore MT12T I'd buy one even  at the above price.   But
really these older GPSs are already at  the single digtit of
nanoseconds level and I don't see room for improvement  except....

If the L2 band is also used.   This is the way to  get order of
magnitude improments


Chris Albertson
Redondo  Beach,  California

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