[time-nuts] PPS stats

[Bob kb8tq]

Hi

Do you have any other inputs into your server? 

NTP compares the various inputs to come up with things like stability. With
nothing to compare to, there is no data to show.

Bob

> On Jul 6, 2020, at 12:04 PM, Keith E. Brandt, WD9GET <wd9get at amsat.org> wrote:
> 
> I have finally got my RPi NTP server set up referenced to a Thunderbolt PPS.
> NTP is using the PPS and my stats look good, but when I run
> 
>     ntpq -c kerninfo
> 
> my output is:
> 
>     associd=0 status=0118 leap_none, sync_pps, 1 event, no_sys_peer,
>     pll offset:            0.00753
>     pll frequency:         -10.4492
>     maximum error:         0.012
>     estimated error:       1e-06
>     kernel status:         pll nano
>     pll time constant:     4
>     precision:             1e-06
>     frequency tolerance:   500
>     pps frequency:         0
>     pps stability:         0
>     pps jitter:            0
>     calibration interval   0
>     calibration cycles:    0
>     jitter exceeded:       0
>     stability exceeded:    0
>     calibration errors:    0
> 
> The pps frequency, stability, and jitter are all zero.
> 
>     dmesg | grep pps
> 
> and
> 
>      ppstest /dev/pps0
> 
> both indicate the kernel pps support is working.
> 
> Why isn't the kerninfo showing any info on the pps frequency, stability, and jitter?
> 
> --Keith
> 
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