, Issue 7
Date: Sat, 9 Oct 2021 15:18:08 -0700
From: ed breya
Subject: [time-nuts] Re: HP Z3801A info needed - 1PPS interface
To: time-nuts@lists.febo.com
Message-ID: <61621520.9050...@telight.com>
Content-Type: text/plain; charset=utf-8; format=flowed
I have the 1 PPS circuit working jus
gt;
> > Date: Sat, 9 Oct 2021 15:18:08 -0700
> > From: ed breya
> > Subject: [time-nuts] Re: HP Z3801A info needed - 1PPS interface
> > To: time-nuts@lists.febo.com
> > Message-ID: <61621520.9050...@telight.com>
> > Content-Type: text/plain; charset=utf-8;
On Sun, 10 Oct 2021 03:30:24 -0400, time-nuts-requ...@lists.febo.com
wrote:
time-nuts Digest, Vol 210, Issue 7
> Date: Sat, 9 Oct 2021 15:18:08 -0700
> From: ed breya
> Subject: [time-nuts] Re: HP Z3801A info needed - 1PPS interface
> To: time-nuts@lists.febo.com
> Message-ID:
I have the 1 PPS circuit working just fine. The pulse width is around 27
uSec, nice and flat and strong regardless of the termination. I can't
discern the rise time or prop delay yet.
I discovered an interesting thing about the 1 PPS signals from the DB-25
connector. They are (or rather, one
Hi
The HC series of parts is way past being state of the art for this sort of
thing. Even
the AC series is getting a bit old. There are a number of high speed / high
current
parts out there the NC7SZ125 is one of many many devices out there.
Bob
> On Oct 5, 2021, at 7:04 PM, ed breya wrote:
Jim
Right you are. I now rememeber that and did convert to rs 232. But the
question was about the 1pps.
It was 422 and suspect its now 232 after I did the jumper mod. Will have to
fire up the 3801 and see.
Regards
Paul.
WB8TSL
On Tue, Oct 5, 2021 at 3:53 PM Lux, Jim wrote:
> On 10/5/21 12:46
On 10/5/21 12:46 PM, paul swed wrote:
Ed I seem to be a bit slow. Had not heard of your project.
On the real 3801 the 25 pin connector is actually RS 422.
Regards
Paul
WB8TSL
conveniently enough, there are onboard jumpers that can turn it into
RS232, although these days, you can get a nice
Ed I seem to be a bit slow. Had not heard of your project.
On the real 3801 the 25 pin connector is actually RS 422.
Regards
Paul
WB8TSL
On Tue, Oct 5, 2021 at 3:11 PM ed breya wrote:
> I've been doing a bit more work on the far from finished Z3801A project,
> trying to button things up. It
Hi
> On Oct 5, 2021, at 3:11 PM, ed breya wrote:
>
> I've been doing a bit more work on the far from finished Z3801A project,
> trying to button things up. It has been sitting for years all opened up (but
> running), with temporary pieces and cables and wiring hanging out every which
> way.
