[time-nuts] Low cost GPS module for < 100ns timestamping error

EWKehren at aol.com EWKehren at aol.com
Sat May 3 09:11:18 EDT 2014


I am not advertising for DX but I have bought 4 with good results and their 
 units have a 5 V regulator on it. Some have even a TTL to RS converter on  
board.
Bert Kehren
 
 
In a message dated 5/2/2014 11:40:47 P.M. Eastern Daylight Time,  
tnuts at toneh.demon.co.uk writes:

On  03/05/2014 00:59, EWKehren at aol.com wrote:
> Welcome to the nuts  Tony

Thanks, Bert.

> You are not specifying exactly how  accurate time has to be but in my book
> and based on tests the most  reasonable priced GPS with 1 pps is a 
> Ublox 6M
> that  you  can get with antenna for less than $ 22 antenna included from
>  _www.DX.com_  (http://www.DX.com) . They have volume discount. 
>  Shipping is  very
> slow but included. They seem to be presently  out of the 1 pps version but
> all ublox units have a 1 pps output and I  use with and without and all 
> I do is
>   solder a  wire to pin 3.
> Bert Kehren

As I said in my first post I'd like  to achieve an accuracy of better 
than 100ns - or 50ns if possible at  reasonable cost.

I had come across the Ublox 6M when I was looking  earlier, but I 
misunderstood the data sheet and thought it was only the  expensive 
($135) LEA/NEO-6T versions which provided timing. Definitely  worth a 
closer look - the NEO-6M is specced at 30ns RMS which is good  enough. 
The power consumption is a little higher than I would have  liked  at 
37mA/3V, but still rather less than  others.

Thanks,
Tony
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