Mark, Are you terminating the 1PPS output with 50 Ohms? They expect >1M Ohms..
Bye, Said Sent from my iPad On Nov 24, 2012, at 2:42 PM, Mark Spencer <[email protected]> wrote: > Greetings. I recently acquired two Z3805A gpsdo's from the usual auction > site. (These units look like a Z3801.) > > Does any one know the specified output level for the 1pps signals or have a > high confidence measurement of the output voltage that they could share with > me ? (Measuring fast rise time signals is not really my forte and I don't > trust my measurements of an apparent .15 volt pulse.) > > The status message sent from the units via RS 232 contains a TFOM ( time > figure of merit ?) variable and I've seen that phrase used in conjunction > with equipment that outputs a 10 volt 1 pps pulse. > > On a side note so far I'm pleased with the performance of the units (the 10 > Mhz output of better of the two has a typical adev in the low 10e-12 - high > 10e-13 range, and appears to be improving.) > > Thanks in advance for any comments. > > Regards Mark Spencer. > _______________________________________________ > 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.
