[time-nuts] Affordable (cheap) COTS / eBay kit for TIE / 1PPS phase comparison

Wojciech Owczarek wojciech at owczarek.co.uk
Wed Jan 22 01:23:28 UTC 2014


Hi List,

I'm a software developer turned network test engineer slowly turning
time&frequency guy (not sure if this is upwards or downwards ;-) ) with
some distant background in electronic engineering.

For the last couple of years I have been increasingly involved in various
work involving IEEE 1588 and finally I started fitting out a small home lab
setup. I never really needed lab kit at home before and my work lab is
primary to do with Ethernet and IP (and timing, but outside my price
ranges), so I was wondering if you could point me in the right direction:

I'm looking for some reasonably inexpensive solution to allow me a) to do
TIE measurements of 1PPS signals against a reference and b) do phase
comparisons of different 1PPS signals - so something with REF and at least
two inputs.

I have an OCXO GPS reference (upgradable to Rb) with 1PPS, 5MHz and 10MHz
outputs which is stable enough for my needs so that part (perhaps most
important) is sorted. In terms of requirements, granularity wise, well, as
good as achievable - I'm used to 10 ns and 5 ns granularity with TIE that I
get from work kit. 50 ns or better would be perfect.

I must add that ideally I would like to avoid having to design or build the
kit myself - I would love a project, but I have time to spare to complete
one.

Any pointers much appreciated.

Best regards
Wojciech

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Wojciech Owczarek



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