[ntp:questions] Dual Mixer Time Difference (DMTD) instruments sought

Uwe Klein uwe_klein_habertwedt at t-online.de
Tue May 13 09:36:21 UTC 2008


Joseph Gwinn wrote:
> I may need a Dual Mixer Time Difference (DMTD) instrument, to measure 
> picosecond changes in electrical length in a coax plus amplifier time 
> reference signal distribution system with total delays in the hundreds 
> of nanoseconds, currently operating at 10 MHz (sinewave), but with 100 
> MHz likely at some future date.
> 
> What DMTD instruments are commercially available?  A google search was 
> not successful - all noise no detectable signal, probably because DMTD 
> instruments are not that common, and many people build their own.
> 
> Thanks,
> 
> Joe Gwinn

Take one of the "better" GS DSO's that have high storage depth.
Read the shots from the DSO and do all further processing in software?

uwe




More information about the questions mailing list