[time-nuts] Advantages of GNSS ???

[Bob kb8tq]

HI

Actually a monotonous ( = un-exciting) GPSDO is a *really* good thing :) Having one that
does exciting stuff from time to time is *not* at all what you are after :)

Now we get to find out what auto spell check did to all of that …...

Bob

> On Jul 9, 2019, at 3:57 PM, David G. McGaw <David.G.McGaw at dartmouth.edu> wrote:
> 
> Leo -
> 
> I do believe you mean non-monotonic, rather than non-monotonous. Not 
> being monotonous is a good thing.  :-)
> 
> David N1HAC
> 
> On 7/9/19 1:20 PM, Leo Bodnar wrote:
>> It's not very good, it is highly non-linear and even worse - nonmonotonous.
>> It sometimes produces runt pulse glitches when you roll time backwards.
>> I have used them in GPS clocks for many years but never enabled them for end user mode.
>> It's really a very primitive delay line series and I don't regret seeing it gone.  On top of this it is Maxim, doh!
>> Leo
>> 
>> Chris Caudle wrote:
>>> The original is not, there is a close variant still in production:
>>> 
>>> https://nam05.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.maximintegrated.com%2Fen%2Fproducts%2Fanalog%2Fclock-generation-distribution%2FDS1124.html&data=02%7C01%7Cdavid.g.mcgaw%40dartmouth.edu%7C6a86facc79d243f1cd2308d7049fba48%7C995b093648d640e5a31ebf689ec9446f%7C0%7C0%7C636982956387678192&sdata=TmHZH%2FJQpSatDlFqHcbQp%2BPHrS9CGjFHe5oPNYzHbRQ%3D&reserved=0
>>> 
>>> "The DS1124 is an 8-bit programmable timing element similar in function to
>>> the DS1021-25. The 256-delay intervals are programmed by using a 3-wire
>>> serial interface. With a 0.25ns step size, the DS1124 can provide a delay
>>> time from 20ns up to 84ns with an integral nonlinearity of ±3ns. "
>>> 
>>> Small package, would be a little difficult to prototype by hand, but not
>>> impossible.
>>> 
>>> -- 
>>> Chris Caudle
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