[time-nuts] TAC/TDC

Magnus Danielson magnus at rubidium.dyndns.org
Tue Dec 14 18:56:17 UTC 2010


On 12/14/2010 06:10 PM, Bob Camp wrote:
> Hi
>
> Do you also require precision in the ~ 1 ps range as well as resolution?
>
> If so, that opens up a whole series of issues about:
>
> 1) How long since it was calibrated
> 2) Temperature and other environmental effects
> 3) Traceability of calibration
>
> Not a simple or cheap problem to solve.

A little more details in requirements should be needed...

What rate of measurements? 1 measurement per second? 10? 100? 100k?

What trigger-jitter is tolerated? 1 ps RMS? 10 ps RMS? 100 ps RMS?

What linearity requirement is needed? 1 ps? 100 ps?

Do you mean that "<= 1 ps resolution" really means that time 
quantization needs to be less than 1 ps?

Essentially, a little more insight to the actual need for the 
application at hand is needed for good assistance.

BTW. The ACAM TDC-GPX gets you down to 10 ps...

Cheers,
Magnus



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