Author Topic: Rigol oscilloscope triggering  (Read 387 times)

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Offline cap4096

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Rigol oscilloscope triggering
« on: November 14, 2018, 03:14:57 am »
Hi!

I am trying to detect if two signals are going high at the same time, it is important that the two signals never are high at the same time. Is there any trigger condition on a Rigol 4054 or Rigol 1054z that can detect if CH1 and CH2 or CH3 and CH4 goes high?

To clarify i would like to capture if:
CH1 and CH2 goes high OR
CH3  and CH4 goes high.

/cap4096
 

Offline metrologist

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Re: Rigol oscilloscope triggering
« Reply #1 on: November 14, 2018, 03:33:57 am »
Maybe with a pass/fail mask test? Here is an image:

https://www.eevblog.com/forum/testgear/rigol-oscilloscope-remote-control-using-ni-visa/



And there is also pattern trigger which can trigger when one channel high and other low or high, etc.
« Last Edit: November 14, 2018, 03:56:48 am by metrologist »
 

Offline Fungus

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Re: Rigol oscilloscope triggering
« Reply #2 on: November 14, 2018, 04:30:45 am »
Hi!

I am trying to detect if two signals are going high at the same time, it is important that the two signals never are high at the same time. Is there any trigger condition on a Rigol 4054 or Rigol 1054z that can detect if CH1 and CH2 or CH3 and CH4 goes high?

"Pattern Trigger" is the AND of two channels.

I don't think you can do two at once though. Maybe get some 74LS logic chips...

(or program an Arduino of the signals aren't in the multi-MHz range).


 

Offline Keysight DanielBogdanoff

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Re: Rigol oscilloscope triggering
« Reply #3 on: November 14, 2018, 04:50:07 am »
I'm not 100% sure on the Rigol, but it's possible you could do this with digital channels. The external trigger chips are a good idea as well, you could use some logic gates as a "probe." It does depend on your speeds, of course.
 

Offline wolfp

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Re: Rigol oscilloscope triggering
« Reply #4 on: November 14, 2018, 05:18:20 am »
What about adding the channels and trigger if the voltage of the result is larger than a logic 1?
I dont know if it works with Rigol scopes.
 

Offline Fungus

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Re: Rigol oscilloscope triggering
« Reply #5 on: November 14, 2018, 05:27:33 am »
What about adding the channels and trigger if the voltage of the result is larger than a logic 1?
I dont know if it works with Rigol scopes.

It would work, but... the 'scope already has a special trigger mode for the "AND" of two channels, might as well use it.

(and the OP wants to use four channels so both methods fail).
 


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