From: Heiko Degenhardt (firstname.lastname@example.org)
To: HP VEE Reflector (email@example.com)
Date: Tue Mar 9 09:03:35 MET 1999
Subject: VRf - Tek scope <-> Bus Extender / speed problem?
I am trying to read the setup data off a TDS784D Scope.
The only way to do this is reading the "Learn String" (using
the "*LRN?" command). The Scope sends the data as a string
that includes all the commands with a ";" as delimiter.
The problem is: The transfer is allways corrupt, that means
there are characters missing in the string.
If I read the string as "token" with ";" as delimiter, it is
allways the first char following the ";" that is missed.
If I read the string char by char, then I miss chars somewhere
in the string.
I found out that our NI GPIB-140 Bus Extender seems to
be the problem, because if I read the data direct from the
scope into the PC (without the extender) everything is fine.
(May be it is a problem concerned with that extender and
our HPIB 82340 card?).
Is somebody else using such a bus extender?
Has someone else seen that problem with other instruments?
With kind regards / Mit freundlichen Gruessen.