[time-nuts] OT: Prologix GPIB and HP3478A...

Didier Juges didier at cox.net
Tue Nov 27 23:12:49 EST 2007


I have used my HP 3478A with my Prologix controller (and several other GPIB
controllers), but I have not upgraded the firmware to 5.0 (I think I am
still at 4.61 or something like that). I will try and let you know.

The 3478 is a relatively recent instrument (as far as GPIB
features/capability/compliance is concerned), so I am surprised you would
have problems.

Didier KO4BB 

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Chuck Harris
Sent: Tuesday, November 27, 2007 9:34 PM
To: Discussion of precise time and frequency measurement
Subject: [time-nuts] OT: Prologix GPIB and HP3478A...

Hi Gang!

I just bought a Prologix GPIB <-> USB converter model, version 5.00, and I
am having some problems.  It works fine on some of my instruments, but it
just locks up when I hook it to an HP3478A DVM.  The DVM is known good, and
works great with my HP85B (doesn't everything?).

Basically, if I do any commands that require bus activity, the Prologix
locks up and refuses to respond to even the ++ver command.  When I unplug
the HP3478A, the Prologix once again finds its happy spot, and responds

Any ideas?

-Chuck Harris

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