In article <[EMAIL PROTECTED]>, Joseph Gwinn <[EMAIL PROTECTED]> 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. The silence, the silence. I have not found too many commercial DMTF units, but I have found one, although the maker does not market it a such: The Symmetricom 5120 <http://www.symmttm.com/products_pn_adev_test_sets_5120A.asp> is at heart a digital DMTD instrument, and will make all the usual DMTD measurements, although it is marketed primarily as a phase noise test set. What else is available? Joe Gwinn _______________________________________________ questions mailing list [email protected] https://lists.ntp.org/mailman/listinfo/questions
