[ntp:questions] fudge time1 for gps-18x-LVC?

unruh unruh at wormhole.physics.ubc.ca
Sat Feb 6 18:15:38 UTC 2010

On 2010-02-06, David J Taylor <david-taylor at blueyonder.delete-this-bit.and-this-part.co.uk.invalid> wrote:
> "David Lord" <snews at lordynet.org> wrote in message 
> news:7t3ms3Fqe0U1 at mid.individual.net...
> []
>>>> Somehow I think I might be in sync with wrong edge of PPS.
>>> Why?
>> That would put pps out, but I'd have guessed by only 100ms
>> if that's default.
> Yes, David, according to the Technical Specifications the default is 
> 100ms.  I'm surprised that the parallel port is as bad as it appears to 
> be - perhaps some software is getting in the way of the interrupt path. 
> No chance it's polled rather than generating an interrupt, I suppose?

The parallel port is great ( well at least serviced by my own interrupt
service routine). I doubt that the problem is with the those interrupts.
But he could easily see by putting in a printout statement into the
interrupt service routing to print out the time stamp. 
> Cheers,
> David 

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