Not sure if this is the same problem but my Z3801 seems to have the same problem. It doesn't run long due to the 10811 crapping out after a hour, but even leaving it on, the date never seems to update. It's stuck somewhere around 1996 (wild guess).
Bob >>> -----Original Message----- >>> From: time-nuts [mailto:[email protected]] On Behalf Of Tom >>> Van Baak >>> Sent: Tuesday, September 29, 2015 1:41 AM >>> To: Discussion of precise time and frequency measurement >>> Subject: Re: [time-nuts] Z3805A firmware? >>> >>> David Gravereaux wrote: >>> > I've had my unit off and in the closet for quite some time, then >>> > played around with it yesterday. :GPS:INIT:DATE wasn't taking >>> > 2015,09,28 and kept returning E-222 "data out of range" and was stuck >>> > in 1996. A few power cycles and it got to 2007. A few more power >>> > cycles and finally it got it right. >>> > >>> > Is this that 1025 week epoch thing? >>> >>> Good detective work. Yes, it sounds like a GPS 2^10 = 1024 WNRO issue, but >>> no one else has ever reported this AFAIK, so it's very curious. Thanks for >>> posting. Did you check that the NVRAM battery is good? When you measure >>> the voltage after power-off, see if it decays over a few seconds or minutes. >>> >>> List -- if it turns out not to be a NVRAM issue, can anyone else with a Z3805 >>> try to duplicate David's observation? >>> >>> > Anyway, I was wondering about freshening the firmware if possible >>> > before I go delving into the embedded project of adding on an NTP and >>> > PTP grandmaster time server with this as the source. >>> >>> 1) I've never seen firmware updates for the Z38-series. The problem some >>> old GPSDO have (like the Datum TS2100 earlier this year) is usually not in >>> instrument firmware anyway; it's in the OEM GPS timing receiver board. >>> >>> 2) A decades-old surplus eBay GPSDO like this is good to absolutely stunning >>> for home and casual lab use. But I would avoid using them for embedded, >>> serious, professional, or life-safety applications. Can you tell us more what >>> your application is? >>> >>> Thanks, >>> /tvb >>> _______________________________________________ >>> time-nuts mailing list -- [email protected] To unsubscribe, go to >>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>> and follow the instructions there. >>> ----- >>> No virus found in this message. >>> Checked by AVG - www.avg.com >>> Version: 2015.0.6140 / Virus Database: 4419/10728 - Release Date: >>> 09/29/15 _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
