[time-nuts] The ultraAtomic clock for home

[paul swed]

Mike you may have missed it in the thread. I made a mistake its not the
cme8000 chip.
Thats a classic am decoder. *You want the ES100*. Thats a true wwvb bpsk
decoder. Contact La Crosse and ask if they have a model.
Regards
Paul
WB8TSL

On Fri, Apr 7, 2017 at 1:18 PM, Mike Seguin <n1jez at burlingtontelecom.net>
wrote:

> Does anyone know of a clock with digital readout that uses the CME-8000?
>
> Tnx,
> Mike
>
>
> On 2017-04-07 13:03, Tom Van Baak wrote:
>
>> Very good catch it is *not* the cme8000 chip. Thats a classic am receiver.
>>> It is the everset chip. Sorry for mis-leading.
>>>
>>
>> Hi Paul,
>>
>> I can confirm (from talking with the guys backing it) that, yes, it's
>> the EverSet ES100, in die form (CoB). I believe you and I have both
>> used the early Xtendwave dev kits with the ES100 as SMT part. It's
>> nice to see the chip still lives and finally made it to a product!
>>
>>
>> I uploaded more ultrAtomic info and tear-down photos:
>>
>> http://leapsecond.com/pages/ultratomic/
>>
>> I encourage those of you who just bought these clocks to do some
>> experiments. The obvious ones are:
>>
>> 1) See how long it takes to acquire the correct time, at all sorts of
>> different and difficult environments, compared to the traditional WWVB
>> clocks. Check for off-by-one second, or minute, or hour errors.
>>
>> 2) See how accurate they really are. For clocks like this I use a
>> variety of piezo sensors (feel the tick), acoustic sensors (hear the
>> tick), optical sensors (see the tick), and mostly electrical sensors.
>> Some of these are passive (non-destructive) timings and good enough.
>> Others require some level of disassembly but are more precise. For a
>> stepper motor clock it's easy to tap onto the coil connections and get
>> a sharp pulse every second or two. Then use a time interval counter,
>> or picPET, or TICC, or PC-based PPS-capture to collect readings. Note
>> the signal level is usually low power and below typical TTL levels,
>> and they do NOT drive 50R!
>>
>>
>> If all goes well, we can soon talk about a time-nuts special where we
>> get someone to make a timing board or disciplined timing board based
>> on the ES100 chip. The bad news is that at the same price it would be
>> like a million times worse than GPS. The good news is that lots of
>> applications need only ms level timing; there are places where WWVB is
>> receivable and GNSS is not; and then there's the redundancy and
>> low-power factor.
>>
>> /tvb
>>
>> ----- Original Message -----
>> From: "paul swed" <paulswedb at gmail.com>
>> To: "Discussion of precise time and frequency measurement" <
>> time-nuts at febo.com>
>> Sent: Friday, April 07, 2017 5:08 AM
>> Subject: Re: [time-nuts] The ultraAtomic clock for home
>>
>>
>> Tom
>> Very good catch it is *not* the cme8000 chip. Thats a classic am receiver.
>> It is the everset chip. Sorry for mis-leading.
>> Regards
>> Paul
>> WB8TSL
>>
>>
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> ---
> 73,
> Mike, N1JEZ
> "A closed mouth gathers no feet"
>
>
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