Most of the Chinese cheapo units have been frequency, not phase locked. It would be great if you could put the GPSDO outputs into a 2 Channel scope and eyeball them for a while to see if they appear in phase (say plus-minus 20ns) over a few hours.
Tim N3QE > On Apr 10, 2018, at 1:43 AM, donald collie <[email protected]> wrote: > > I`ve just bought two GPSDO`s from China @ US$9-50 each [This is not an > error!] They are stated as being new, and use a Trimball dual oven OCXO. I > plan to run these in parallel [2 antennas, 2 feedlines, and 2 GPSDO`s] It`s > been said that a man with two watches is never happy - unless, of course, > they agree with each other ;-). Being identical the outputs should be > coherent, unless one becomes faulty [one advantage of having two - any > discrepancy and you know something must be wrong]], but is there some > crafty way I can squeeze a little more "accuracy" out of two than if I only > used one? > TIA for your comments............................................Donald > Brett Collie ZL4GX > > PS : I have no connection to the eBay seller. The US$9-50 seems to include > a basic puck antenna, long downlead, and 4 interseries adaptors > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
