[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


John,

DC,  Positive slope, control set to approx. midpoint.

 

-----Original Message-----
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
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 -- time-nuts at febo.com To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.





More information about the time-nuts mailing list