[ntp:questions] got the Sure GPS on order, how do I program it

unruh unruh at invalid.ca
Thu Mar 8 15:39:47 UTC 2012


On 2012-03-08, David J Taylor <david-taylor at blueyonder.co.uk.invalid> wrote:
> "Chris Albertson" <albertson.chris at gmail.com> wrote in message 
> news:CABbxVHuTF=J_oCmDFfVM-
> []
>> It _is_ fair to blame Sure Electronic.  They selected the chip.  If
>> they selected one with poor documentation it's them who did that.
>> They could have picked some other chip with better docs.
>
> If you want an evaluation board for a different chip, surely you would buy 
> a different board?
>
>> That is one reason I like the Motorola brand and the Trimble brand or
>> even Rockwell GPSes.   They have first rate docs written in the USA by
>> real technical writers speak English as their native language.
>> (Actually I'd buy the Sure stuff if it saved me a ton of money or
>> worked better.)
>
> For NTP, Chris, what aspect of performance is inadequate?
>
>> But on the other hand, the Sure GPS works well enough if you can build
>> a custom serial/PPS cable and then just turn it on.  You don't need to
>> know how it works if you are using it only for NTP.
>>
>> Chris Albertson
>> Redondo Beach, California
>
> No special cable needed, just one or two extra links on the board.  I see 
> it as a very low-cost solution which is adequate for the job in hand.  The 
> sub-microsecond level performance of higher-cost solutions isn't required 
> for NTP.
>
> Anyone wanting a no soldering solution could get the ready adapted GPS 18x 
> LVC, at a somewhat higher price.

It also requires soldering-- of the output lines which are bare, to
something, and something to provide power to the system. Ie, much more
work(soldering) is required for the 18x than for the Sure board.
>
> Cheers,
> David 
>



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