[time-nuts] Z3805A firmware?

[Bob Benward]

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:time-nuts-bounces at febo.com] 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
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