Re: [gpsd-users] NTP1 keeps going away.

[stinga]

On 09/11/17 08:50, David J Taylor wrote:
> From: stinga
>
> address@hidden:~# ppstest /dev/pps0
> trying PPS source "/dev/pps0"
> found PPS source "/dev/pps0"
> ok, found 1 source(s), now start fetching data...
> source 0 - assert 1510148557.996485612, sequence: 438970 - clear 
> 0.000000000, sequence: 0
> source 0 - assert 1510148558.001389037, sequence: 438974 - clear 
> 0.000000000, sequence: 0
> source 0 - assert 1510148558.001719066, sequence: 438985 - clear 
> 0.000000000, sequence: 0
> source 0 - assert 1510148558.015093227, sequence: 438986 - clear 
> 0.000000000, sequence: 0
> source 0 - assert 1510148558.020151666, sequence: 438998 - clear 
> 0.000000000, sequence: 0
> source 0 - assert 1510148558.996611407, sequence: 439003 - clear 
> 0.000000000, sequence: 0
> source 0 - assert 1510148559.001163803, sequence: 439006 - clear 
> 0.000000000, sequence: 0
>
> It is strange , as it just sits there quite happily and then 
> eventually barfs and looses NTP1.
> ===============================
>
> I would check the PPS signal with an oscilloscope - it seems to have 
> some "bounce" so may not be very "clean".  The GPS isn't set to 5 
> iterations per second, I suppose?

Hi David,

Thanks for the response, I don't believe it is set for 5 per second and 
I have just seen one with 21 iterations.

I don't have access to an oscilloscope currently, but I can get one.
If the PPS is not clean what can I do to fix this and what could cause a 
non-clean signal?

--
'ooroo

Stinga...(:)-)
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