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: [Fwd: Re: Question on supporting GPIB waveform acquisition from a variety of scopes]
From: Ned Arnold <nda@aps.anl.gov>
To: "'tech-talk@aps.anl.gov'" <tech-talk@aps.anl.gov>
Date: Wed, 21 Jun 2006 12:07:47 -0500


-------- Original Message --------
Subject: Re: Question on supporting GPIB waveform acquisition from a variety of scopes
Date: Wed, 21 Jun 2006 12:07:10 -0500
From: Ned Arnold <nda@aps.anl.gov>
To: Chestnut, Ronald P. <ronc@slac.stanford.edu>
CC: Nick DiMonte <npd@aps.anl.gov>
References: <A34E01EABE96174A81D754F98FC574E801803EF7@exch-mail4.win.slac.stanford.edu>


Chestnut, Ronald P. wrote:
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

Hellooooo Ron -


We have pretty exhaustive support for the TDS3xxx series (contact Nick
DiMonte - npd@aps.anl.gov), but I don't know off hand how it handles
this.  The GUI, of course, takes advantage of all the neat features of medm.

Ned

PS: Where is our "EPICS Community Device Support Database" where one can
query for such support?




Replies:
Re: [Fwd: Re: Question on supporting GPIB waveform acquisition from a variety of scopes] Andrew Johnson

Navigate by Date:
Prev: Question on supporting GPIB waveform acquisition from a variety of scopes Chestnut, Ronald P.
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 
Navigate by Thread:
Prev: RE: Question on supporting GPIB waveform acquisition from a variety of scopes Allison, Stephanie
Next: Re: [Fwd: Re: Question on supporting GPIB waveform acquisition from a variety of scopes] Andrew Johnson
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 ·