EEVblog Electronics Community Forum
Products => Test Equipment => Topic started by: roli_bark on May 14, 2013, 08:11:41 am

Is there a way to preform Math > Logic conversion for Ch.1 & Ch. 2 simultaneously (Rigol DS2702) ?
E.g.  The goal is to achieve a logic ('0' or '1') display of the 2 internal variables (A & B), A sourced by Ch.1, B sourced by Ch.2, with appropriate Threshold levels for Ch.1 & Ch.2 ? Also, enabling the display of variables A/B only [rather than an overlay] ?

Is there a way to preform Math > Logic conversion for Ch.1 & Ch. 2 simultaneously (Rigol DS2702) ?
E.g.  The goal is to achieve a logic ('0' or '1') display of the 2 internal variables (A & B), A sourced by Ch.1, B sourced by Ch.2, with appropriate Threshold levels for Ch.1 & Ch.2 ? Also, enabling the display of variables A/B only [rather than an overlay] ?
I don't understand what you're asking; can you be more specific? Obviously, the DS2000 does Math > Logic (AND/OR/NOT/XOR) using either or both channels as source  but what do mean simultaneously?

Ooops sorry, elaborate:
The goal is to get a Logic representation of all Analog Channels.
Today there's only one Math function in Rigol Scopes (displayed as 'Deep Blue). To get the Math function represent CH.1 as logic '0'/'1', a Math = 'A or B' can be defined for example, where A is sourced by Ch.1 & B by Ch.2 (tied to Ground). Now the 'DeepBlue' Math display represents Ch.1 digitally.
My question is whether it is possible to defined 2 Math functions for the 2 channels (or 4 for 4)
Example:
Math set to the logic option. And the logic equations are defined as,
Math1 = A or GND
Math2 = B or GND
Math3 = C or GND
Math4 = D or GND
Where A is sourced by Analog Ch.1 (with the appropriate Threshold defined for Ch.1)
Where B is sourced by Analog Ch.2 (with the appropriate Threshold defined for Ch.2)
Where C is sourced by Analog Ch.3 (with the appropriate Threshold defined for Ch.3)
Where D is sourced by Analog Ch.4 (with the appropriate Threshold defined for Ch.4)
with the option to display only Math1, Math2, Math3, Math4 (and not as an overlay).

My question is whether it is possible to defined 2 Math functions for the 2 channels (or 4 for 4)
No. The DS2000 can display only one Math waveform at a time.
with the option to display only Math1, Math2, Math3, Math4 (and not as an overlay).
No. If channel 1 or 2 are turned on (visible), they can be used as a source  if they're not visible, they can't be a source.

 if they're not visible, they can't be a source.
Yes, but if you stop the scope you can turn the channels off and still see the math curve.

Yes, but if you stop the scope you can turn the channels off and still see the math curve.
Sure, because sample memory is frozen and not being overwritten with new data. When the scope is running, turning off one channel will automatically cause the memory to be reassigned to the other channel  and so overwritten.

I wonder whether Rigol read posts here. This could be a nice wishlisted feature, that could have been (or can be) implemented by Firmware alone, and could gain us users 4 LA channels...