[time-nuts] PPS delay on rockwell

[Francesco Messineo]

Hi all,

I'm testing a custom (and unknown to me) GPS board I had for free some
years ago. It has a 10 KHz output and 1 PPS output.
Using a thunderbolt as reference, 10 KHz output is abut 13 mHz higher
(10 MHz output of the thunderbolt is the time base of the counter,
HP-5386A).
I measured the PPS output with an HP-5328B, PPS of the thunderbolt as
start, rising edge, rockwell PPS as stop, rising edge. The delay is
406.3 ms +/- 30 uS.
Are those numbers normal for a rockwell chipset? Any idea why the two
PPS are so far apart? PPS offset on the thunderbolt is set to 0.

Thanks
Frank