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

Brooke Clarke brooke at pacific.net
Tue Nov 27 23:18:16 EST 2007


Hi Chuck:

It may be timing.  The 85 and the 3478 are old and slow.  Have you tried adding 
  wait statements after you send any command to give the 3478 time to think 
about it?  Also it may be good to send <CR><LF><EOI> after each command then do 
the wait.

Have Fun,

Brooke Clarke
http://www.PRC68.com
http://www.precisionclock.com
http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam


Chuck Harris wrote:
> 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
> normally.
> 
> Any ideas?
> 
> -Chuck Harris
> 
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