[time-nuts] Newbie question: GPSDO filtering principles

Peter Vince pvince at theiet.org
Sun Apr 22 11:29:58 EDT 2007

--- Ulrich Bangert <df6jb at ulrich-bangert.de> wrote:
> are these GPSDOs homebuilt units following the concept as published in
> the German ham radio magazine "cq-DL" some years ago?

No - they are commercial units, but not from any of the major
manufacturers you see discussed in this forum, albeit they use an Efratom
LPRO rubidium, and a Trimble GPS receiver, but proprietary buffering and
disciplining hard/firmware.

--- Dr Bruce Griffiths <bruce.griffiths at xtra.co.nz> wrote:
> Some of these disciplining algorithms are tunable, has the integral
> term been set to zero?

There is no mention of any such tweaks in the manual.

Thank you both for your replies.


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