[time-nuts] Off the wall: anyone with experience programmingHP3456A?

Magnus Danielson cfmd at bredband.net
Sat Sep 10 14:42:10 EDT 2005

From: "Poul-Henning Kamp" <phk at phk.freebsd.dk>
Subject: Re: [time-nuts] Off the wall: anyone with experience programmingHP3456A? 
Date: Sat, 10 Sep 2005 20:24:25 +0200
Message-ID: <15261.1126376665 at phk.freebsd.dk>

> In message <4323228B.7040401 at febo.com>, John Ackermann N8UR writes:
> >In theory, the bus is supposed
> >to handshake to avoid that problem, but that's not always reliable on
> >the older instruments -- they will report that they're ready for another
> >command when in fact they aren't.  In fact, while doing this experiment
> >the 5370B would show "Err 1" (invalid command) on its display if I tried
> >to talk to the 3456A too soon after talking to the 5370.
> Are you 100% sure this is a problem on the 5370B ?
> I've spent a lot of time with my logic analyzer while implementing
> GPIB in FreeBSD (partly because I couldn't find a datasheet for the
> uPD7210 anywhere) and I have never seen my 5370B misbehave in any
> way.

I think I have the uPD7210 datasheet lying around here if you still need it,
even for verification.

I am following this thread with some interest, since I have too been bitten by
the SRQ monster when (trying) to program against one of my HP3457A's.


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