Argonne National Laboratory

Experimental Physics and
Industrial Control System

1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  <20062007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  Index 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  <20062007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017 
<== Date ==> <== Thread ==>

Subject: Question on supporting GPIB waveform acquisition from a variety of scopes
From: "Chestnut, Ronald P." <ronc@slac.stanford.edu>
To: <tech-talk@aps.anl.gov>
Date: Wed, 21 Jun 2006 09:49:31 -0700
We are moving our legacy VMS-based GPIB control and acquistion to EPICS. SLAC uses a number of different scopes from different vendors. The more modern scopes, like the Tektronix TDS3000 support GPIB commands which return a "preamble" with the waveform data. This preamble contains, among other things, scaling information needed for proper display. Other, older scopes, require that each tidbit of information be requested individually.

The TDS3000 "WAVFrm?" command returns:

Write returned 0 and wrote 7 bytes
Read returned 0 and stopped for 1 read 1024 bytes
Buffer: 2;16;BIN;RI;MSB;10000;"Ch2, AC coupling, 5.0E-2 V/div, 4.0E-7 s/div, 10000 points, Sample mode";Y;4.0E-10;0;-2.08E-6;"s";7.8125E-6; 0.0E0;1.5744E4;"V";#520000

Has someone addressed the problem of a generic method to receive these interesting strings and parse the information out?

I can see a few ways to do each device with GENSUB or driver code or even (my favorite hammer) some SEQ program, but am hoping someone has a clever solution already.

Ron Chestnut


Replies:
Re: Question on supporting GPIB waveform acquisition from a variety of scopes Luedeke Andreas
RE: Question on supporting GPIB waveform acquisition from a variety of scopes Allison, Stephanie

Navigate by Date:
Prev: RE: CA troubles Jeff Hill
Next: [Fwd: Re: Question on supporting GPIB waveform acquisition from a variety of scopes] Ned Arnold
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  <20062007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017 
Navigate by Thread:
Prev: VDCT survey results Shepherd, EL (Emma)
Next: Re: Question on supporting GPIB waveform acquisition from a variety of scopes Luedeke Andreas
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  <20062007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017 
ANJ, 02 Sep 2010 Valid HTML 4.01! · Home · News · About · Base · Modules · Extensions · Distributions · Download ·
· EPICS V4 · IRMIS · Talk · Bugs · Documents · Links · Licensing ·