[time-nuts] ADEV with very short Tau

Bob Camp kb8tq at n1k.org
Wed Apr 29 07:40:17 EDT 2015


Hi

The cheap / simple approach for ADEV is a single or dual mixer setup. Mix the signal(s) down to an audio frequency and measure those. Mix down
frequencies like 10 KHz will let you measure some pretty short Tau’s. 

If you want a purchased single box solution, then something like a TimePod will be needed. 

There are a multitude of options other than those ….

Bob


> On Apr 29, 2015, at 5:29 AM, claude.ff at aliceadsl.fr wrote:
> 
> Hello
> 
> I know how to measure ADEV with frequency method (using a 53131A counter) or time difference method (using 1 PPS of a GPSDO for example) but I would like to measure ADEV in the sub-second domain (from 0.1s to 1s for example). Do I need a Time Interval Analyzer, if so, an HP 5371A is ok for that ? Or there are simpliest method ?
> 
> Thanks for your advices.
> 
> 
> Claude
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