Comments on: Controlling a Rigol oscilloscope using Linux and Python

By: Cullen Newsom

Cullen Newsom — Thu, 19 Jan 2012 21:02:59 +0000

line 41 of realtimechart.py

data = (data – 130.0 – voltoffset/voltscale*25) / 25 * voltscale + voltoffset

I also had to
plot.plot(t1[0:600], d1[0:600])
plot.plot(t2[0:600], d2[0:600])

Which gives me a slightly bogus plot.

Many thanks for posting this.

By: mahto

mahto — Tue, 27 Dec 2011 06:31:35 +0000

Sweet, glad it worked for you!

By: NathanW

NathanW — Mon, 26 Dec 2011 03:26:43 +0000

Hey this was great. Thanks for publishing your code. I used your first class to work with a Tektronix 2024C scope with no problems. It only took me a few hours searching to find you

Great work!

By: mahto

mahto — Thu, 03 Feb 2011 05:15:23 +0000

@Mike Thanks! Good luck getting it set up- I just thought of a new project to use the code for (a live scope trace with a little character that runs and jumps across the screen as new data comes in), so I might be motivated to get back into this as well

By: Mike

Mike — Thu, 03 Feb 2011 01:09:35 +0000

I just had the same issue with the 10 extra data points and I have started to work on fixing it. I added an offset to the numpy.frombuffer() command. Check out my fork at github. I just started on this today and I'm not quite sure where it will take me. @mahto: This is a great start, thanks for your work setting this up.

By: mahto

mahto — Fri, 28 Jan 2011 08:35:24 +0000

I haven’t played with it in a while, however I consistently crashed the scope when attempting to grab long data captures from it. My guess is that it is buggy firmware . If you find a fix, let me know.

By: Hamid Ohadi

Hamid Ohadi — Thu, 27 Jan 2011 12:55:19 +0000

Thank you for your script. It got me started. I have a question though. Have you got this scope to capture in RAW mode? I can’t get more than 600 datapoints out of it and I’m using the latest 2.04 firmware. In the manual it says you could potentially capture 5k points. I tried:

:WAV:POIN:MODE RAW
:ACQ:MEMD LONG

By: mahto

mahto — Tue, 11 Jan 2011 07:02:56 +0000

Oh, that is totally possible. I got frustrated because the whole thing was pretty fragile (sending an improper command could crash the scope, etc), and haven’t really played with it much since- I’d be interested to know if you make any progress though, since I might need to make some automated test rigs that use them in the near future.

By: CH

CH — Sat, 08 Jan 2011 00:02:43 +0000

I used the code from the git repo.
When I ran it, it seems that ‘data’ is 10 items larger than ‘time’,
It seems the first 10 entires in the data list might not be proper data,
since they7 don’t seem to change; Could these possibly be something
else? ranges perhaps?

By: mahto

mahto — Sat, 12 Jun 2010 18:12:34 +0000

@elliot Probably not, the scopes seem pretty unstable- what version of the firmware do you have running? It works fine for me using 00.02.02 SP2, but it wouldn't work for me with the newest firmware (2.04?)