Hal-
Sure enough, power down and ant disconnect were key.
Many thanks.
Charlie
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Hal Murray
Sent: Sunday, November 01, 2015 6:20 PM
To: Discussion of precise time and frequency measurement
Hi,
It just so happens I've been playing around with GPS week rollover on the
Tria GPS. I added an option to simulate the next rollover in 2019, and did
some experimentation with a REF-0. With this being a current topic in this
thread, I decided to do a quick write-up on it:
Following Nick's comment, under the subject "Z3801A and FE-5680A Allen
Variances", that he briefly considered designing a board to GPS discipline
the FE5680A, I'm pretty sure that a year or so ago just such a board was
suggested as being close enough to completion to warrant a request for
I briefly considered designing a board that would GPS discipline the FE-5680A.
It’d simply substitute an RS-232 level shifter for the DAC and would speak the
protocol to trim the frequency. I haven’t done it, though, because the OH300’s
performance specification at low tau is not that far
I believe Dan Watson's Tria GPS receiver project, emulating the Motorola UT+
GPS receiver, will have an audience not only for GPS rollover issues -- but as
constellation alternatives increase by 2020 (user choices).
http://syncchannel.blogspot.com/2015_10_01_archive.html
Heol Designs (France)
