[ntp:questions] Linux NTPd using a older Trimble Thunderbolt GPS Receiver

George Ross gdmr at inf.ed.ac.uk
Mon Jan 19 10:00:06 UTC 2015

> Shouldn't it show a 'o' rather than a '*' when it is locked to PPS
> in kernel mode?

Ah, but it's not doing PPS.  The driver waggles one of the control lines
and the device transmits a timestamp in response.
George D M Ross MSc PhD CEng MBCS CITP, University of Edinburgh,
School of Informatics, 10 Crichton Street, Edinburgh, Scotland, EH8 9AB
Mail: gdmr at inf.ed.ac.uk   Voice: 0131 650 5147   Fax: 0131 650 6899
PGP: 1024D/AD758CC5  B91E D430 1E0D 5883 EF6A  426C B676 5C2B AD75 8CC5

The University of Edinburgh is a charitable body, registered in
Scotland, with registration number SC005336.

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