[time-nuts] Symmetricom TS2100 Faults and Forgetfulness

[Bruce Lane]

	Thumbs-up for the HEOL replacement receiver. I've put 'em in both my
2100's, with outstanding results. Couple that with changing out the
oscillators to OCXO's, and the result is enough to keep any time-nut
happy. ;-)


On 27-Nov-18 09:38, Gregory Beat via time-nuts wrote:
> Chris -
> 
> Did you update this TS-2100 with HEOL Design’s replacement GPS receiver?
> Several time-nuts participants (and some scientific organizations) performed this update/upgrade (including me), replacing the obsolete TrimbleACE III GPS receiver.
> http://www.heoldesign.com/N024-GPS-receiver-board-for-Tymserve-2100
> —
> On January 2015, TymServe 2100 servers started failing in the time displayed, and there was 1 second offset.  On May 3, 2015, the TS2100 showed another bug, by displaying an incorrect date : September 17, 1995 (1024 weeks earlier, GPS Week Number Roll-over).
> 
> Symmetricom (Microsemi) published a note about this WNRO bug, 
> explaining that no fix was available (from Microsemi).
> HEOL Design (France) developed a solution for these TS2100 issues.
> http://www.heoldesign.com/IMG/pdf/heol-tech_note_119_en_r02.pdf
> 
> HEOL DESIGN
> Pôle Phoenix
> Route du radome
> 22560 PLEUMEUR BODOU
> France
> T: (+33)296 48 46 05
> M:(+33)603 55 19 45
> E: contact at heoldesign.com
> —
> greg, w9gb
> 
> ====
> Subject: Symmetricom TS2100 Faults and Forgetfulness
> Date: Mon, 26 Nov 2018 18:31:30 +0000
> From: Chris Quayle
> To: time-nuts-request at lists.febo.com
> 
> Hi,
> Question for the group. 
> I have a Symmetricon TS2100 which has faults.
> It's been some time since it was last used, but powered it up
> recently to find that it had lost it's setup data, display showed
> rubbish and the year is stuck at 1997, though the time of day is
> accurate once it has achieved 1pps lock. Apart from that, everything
> else looks ok. The display can be reset with the "root util display
> 0x97900" command and the firmware was upgraded about a year ago to
> the latest revision from the symmetricom site.
> 
> Just wondering if it could be a faulty eeprom, but not managed to
> find a schematic or service data for it, so difficult to debug at
> a hardware level. Any suggestions would be welcome...
> 
> Chris
> 
> 
> Sent from iPad Air
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-- 
---
Bruce Lane, ARS KC7GR
http://www.bluefeathertech.com
kyrrin (at) bluefeathertech dot com
"Quando Omni Flunkus Moritati" (Red Green)