[volt-nuts] GPIB Issue with 3458A

Randy Evans randyevans2688 at gmail.com
Sat Dec 30 00:39:57 EST 2017

I am still unable to get my HP-3458A to work with the xdevs program
"HP3458A_Measure_DMM_Noise.488" (https://xdevs.com/article/dmm_noise/).  It
works fine with my Agilent 3458A and with a friend's HP-3458A and his
Agilent 3458A using the EZGPIB program.  The SW versions are identical with
my friend's DMMs, the HP units are (8.2) and with the Agilent units are
(9.2).  However, both of my units work fine with the KE5FX GPIB Toolkit
HP3458.EXE program to download the NVRAM CAL data.  This would seem to
indicate that my HP-3458 GPIB works at least partially.

Does anyone have a EZGPIB program that I could try to run (that is
different from the Xdev program)?  It would be nice to see if I could get
something to work other than the HP3458.EXE program.  Or if any one has
some ideas on what to look for.


Randy Evans

On Tue, Dec 26, 2017 at 7:24 PM, Randy Evans <randyevans2688 at gmail.com>

> I am hoping some of you experts might be able to assist with a strange
> problem i am having trying to make automated measurements using EZGPIB with
> an Agilent and an HP 3458A.  I have a program given to me by Martin
> Reynolds, which is a variant on the Xdevs noise measurement program.
> Martin's program continuously reads the voltage measurements sequentially
> from the two meters and then stores then in a measurements file, along with
> the temperature measurements from both meters.  The program works fine on
> his Agilent and HP 3458As.
> On my two 3458As, it takes the temperature measurements just fine but only
> takes a voltage measurement from the Agilent unit.  The HP unit will not
> make any voltage measurements although I can see both the 3458As in talk
> states and, of course, it does sent the temperature measurements.  However,
> if I turn the HP unit off and then on again, the HP will start to take
> voltage and temperature measurements and send them to the PC.
> Any ideas on what might be causing the strange behavior?
> Thanks,
> Randy Evans

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