John, DC, Positive slope, control set to approx. midpoint.
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of John Miles Sent: Wednesday, September 21, 2011 10:48 AM To: 'Discussion of precise time and frequency measurement' Subject: Re: [time-nuts] 1 PPS from Z3801A Does it need conditioning. > > I have a z3801 and trying to use the 1 PPS from the rear panel for the start > input of an HP5370B > This approach seems to work fine until a load is either added or > turned off > on the same AC circuit or a nearby circuit. > > At which point the hp5370 takes a hit and a trace that had been > running ok drops back to 1x10 -3 or ... > > When using 10 Mhz or 100 Khz as the start input this does not happen. > > The connector on the back of the z3801 is in a format Pseudo ECL and I don't > think it uses a ground as a reference. > Is there a simple one transistor buffer that I can use, build it right > inside db 25 shell? > > Or maybe there is a different approach? What trigger level setting are you using on the 5370? Keep it away from the rails. -- john, KE5FX _______________________________________________ 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.
