> 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" <paulsw...@gmail.com>
To: "Discussion of precise time and frequency measurement" <time-nuts@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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