[ntp:questions] Fine tuning ntp.conf

William Unruh unruh at invalid.ca
Sat Apr 27 19:03:07 UTC 2019

On 2019-04-27, David Taylor <david-taylor at blueyonder.co.uk.invalid> wrote:
> On 27/04/2019 17:37, William Unruh wrote:
> []
>> On the subject of gps/pps receivers, since the Sure OEM board seems to
>> have disappeared, what is the current recommendation for a cheap gps/pps
>> board to attach to your computer? (the above is not cheap-- on the
>> order of $500, rather than $50)
> Something happened to the previous....
> As mentioned on my Web page:
>    https://www.satsignal.eu/ntp/Sure-GPS.htm
> you can use a cheap module from eBay, or perhaps an Adafruit one, and 

The Sure module no longer seems to exist even on eBay.
They seem to have gone out of the GPS business.

> you could need a TTL to RS-232 voltage level converter:
>Adafruit one looks interesting. 

>    https://www.adafruit.com/product/746
>    https://www.amazon.co.uk/gp/product/B00EJ9NAKA
> I found that the PPS signal was OK at TTL level.
> The Leo Bodnar unit would be ideal as a central server for a small group 
> or bigger, and has the advantage of excellent support.  The cost is 
> appropriate for the quality level of the unit, but it would likely be 
> overkill for a single PC.
> http://www.leobodnar.com/shop/index.php?main_page=product_info&cPath=120&products_id=272

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