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Subject: GPIB replies lost?
From: Michael Davidsaver via Tech-talk <tech-talk@aps.anl.gov>
To: EPICS Tech-Talk <tech-talk@aps.anl.gov>
Date: Fri, 19 Apr 2019 13:06:25 -0700
All,

I've come across a new (to me) oddity involving GPIB communication between
a Keysight/Agilent E5810A GPIB to ethernet bridge, and a Keysight/Agilent/HP
3458A DMM.  I'm contacting Keysight support, but thought I'd see if someone
had already run across this issue.


It appears that the DMM is receiving commands which I send.
"BEEP" makes the DMM beep.  If I send an invalid command I can
read the error message through its front panel.
However, valid commands which should send a reply (eg. "ID?") don't
trigger an error, but also timeout without sending back any reply string.

I see the same behavior with a second 3458A.  Also when sending commands
directly through the embedded web server in the E5810A or a python vx11 client.

I tried two different GPIB devices (Keithley and Datron DMMs) with the same
E5810A and cable.  Both send back replies and otherwise behave as I expect.


Thanks,
Michael


Also, a random fact for Friday.  I was on a flight from JFK to LHR
which was listed as 3458 miles.

Replies:
Re: GPIB replies lost? Eric Norum via Tech-talk
Re: GPIB replies lost? Eric Norum via Tech-talk
Re: GPIB replies lost? Michael Davidsaver via Tech-talk

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