Time Sync Issue

badukp

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Jun 17, 2026, 9:51:04 AM (11 days ago) Jun 17

to DigiPi

Hello,

I am using digipi-2.1-1 on WSJT-X ft8, and it appears that there is a time sync issue. I receive very few stations, and they all have a "dt" of +0.7 to +0.8.

I successfully used WSJT-x on ft8 with the previous version of digipi.

My digipi is connected to the internet, however my primary interest is using the digipi out in the field so I have also tried connecting a GPS dongle. The time sync appears to be off in spite of being connected to the internet or GPS dongle.

I would appreciate any suggestions to resolve this issue.

Thanks!

badukp

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Jun 19, 2026, 6:09:37 PM (9 days ago) Jun 19

to DigiPi

I verified that the digipi system clock is synchronized to the NTP service as shown below:

I am monitoring 14.074 MHz, but decode very few stations that all have relatively large "dt". In the past I have always decoded large numbers of stations and the "dt" values were small +/- values.

I would appreciate any suggestions for things I can check or change that may help resolve this issue.

Thanks!

badukp

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Jun 19, 2026, 6:11:59 PM (9 days ago) Jun 19

to DigiPi

Please see the attached video. I have decoded 3 stations in approx 15 min.

Recording 2026-06-19 151057.mp4

badukp

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Jun 19, 2026, 6:14:04 PM (9 days ago) Jun 19

to DigiPi

Below are screen captures showing the WSJT-x settings used with Yaesu FT-891

badukp

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Jun 19, 2026, 6:15:53 PM (9 days ago) Jun 19

to DigiPi

I should note that I setup the FT891 using the tutorial: https://digirig.net/digirig-dr-891-setup-manual/?srsltid=AfmBOoouFaGp-rZLLFx_gol_4VO4RntPdndcUVLeuib0DY6IA3msw298

Craig

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Jun 22, 2026, 1:42:55 PM (6 days ago) Jun 22

to badukp, DigiPi

Hey badukp,

0.2 isn't awful, 0.4 is pushing it. DigiPi gets time from chronyd via the internet
and debian time servers. there aren't a lot of changes you can make there and
I've never seen it fail. Absent internet, digipi will get time from a GPS.

I'm more concerned you have noise reduction, notch or blank filters engaged
on your rig?

curiously,
-craig

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