[time-nuts] Another "atomic" clock question

[Bob Camp]

Hi

The sawtooth correction on a good GPS will go down to a few hundred ps over a thirty or so ns range. If you are going to correct, you need a chip that is accurate to <100 ps over a 30 ns (> 300  tap) range. That’s a tough part to find. Next you need to worry about jitter in the delay line ….

Once you do all that, you still have a pretty messy PPS.

Bob
 
On Mar 5, 2014, at 9:02 PM, Daniel Mendes <dmendesf at gmail.com> wrote:

> Em 05/03/2014 22:43, Didier Juges escreveu:
>> Tom and Bob,
>> It is not obvious to me that it is "easier" to simply apply a correction in
>> nS increments with a range as wide as 100nS. How is this done? Using
>> switched delay lines or delay gates?
> 
> Using a DS1023 or a DS1124 plus a microcontroller to receive the RS232 message and program the chip to generate the desired delay:
> 
> http://www.maximintegrated.com/datasheet/index.mvp/id/2608
> 
> http://www.maximintegrated.com/datasheet/index.mvp/id/5514
> 
> Daniel
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