[time-nuts] 1 PPS from Z3801A Does it need conditioning.
Paul A. Cianciolo
paulc at snet.net
Wed Sep 21 15:04:46 UTC 2011
DC, Positive slope, control set to approx. midpoint.
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] 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
> input of an HP5370B
> This approach seems to work fine until a load is either added or
> 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
> 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
-- john, KE5FX
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