[volt-nuts] GPIB Issue with 3458A

Todd Micallef tmicallef at gmail.com
Sat Dec 30 07:24:49 EST 2017


Is there a version number at the top of the file? I had two versions (1.00
and 1.01). I can't remember all that changed between the two since it has
been a while but I did find an additional timeout code that limited the
wait time for reading data to 1 minute. I am guessing I had a problem with
mine and added it.

I can email it to you if you want to try it. If it works for you, I will
have Illya update it on xDevs.


On Sat, Dec 30, 2017 at 12:39 AM, Randy Evans <randyevans2688 at gmail.com>

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