[time-nuts] NMEA Time

[paul swed]

Sorry no idea.
It will however be offset from time if your source encodes rs232 and then
you decode it...
Easy way for everyone with a short wave receiver and scope would be to
measure the tick on 1 channel and if I recall the pulse out or you can also
look for the IRIGB leading data. As I recall its fixed and you can see it as
a pattern
But adding a server and etc I am sure its close to 1 second.
Just did not have a need to get that detailed.
I run gps connected to a pic that drives a home brew irigb gen and that
drives numbers of decoders.
The pic does several things. It extracts the time from gps and then
calculates the proper time to acount for the irigb encoder delay.
Essentially I output the next second ahead of 0 time.
Liked all of this pretty well and did essentially the same trick with a
smpte tc generator using jam sync. Works very well. I jam every 10 minutes
so that its always on time. If power fails I jam as soon as things are
stable within 10 seconds.

On Wed, Nov 25, 2009 at 3:03 PM, <SAIDJACK at aol.com> wrote:

> Hi Robert,
>
> thanks for the info. I am wondering how accurate their SNTP server with
> 1PPS RS-232 input is. Not sure how one would test that without specialized
> equipment..
>
> bye,
> Said
>
>
> In a message dated 11/25/2009 11:26:45 Pacific Standard Time,
> robert8rpi at yahoo.co.uk writes:
>
> Hi  Said,
> Yes it does generate IRIG B (modulated AF), I was recommended it to  test a
> reader and it worked fine. You can download a 30 day trial for free.  The
> website lists the limitations on the IRIG output. I didn't read them too
> closely as they didn't affect my application.
>
> Robert  G8RPI.
>
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