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

Poul-Henning Kamp phk at phk.freebsd.dk
Sat Sep 10 14:24:25 EDT 2005

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

Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.

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