Setting the External Trigger Range

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spflanze
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Setting the External Trigger Range

Post by spflanze » Fri Oct 05, 2018 4:00 am

On page 99 of:
https://www.picotech.com/download/manua ... sGuide.pdf
I see for the function ps3000aSetSimpleTrigger() has a 16 bit threshold input argument. Over what input voltage range are these 16 bits fort he External Trigger?

For the function ps3000aSetChannel() on page 74 I do not see the External Trigger is a valid input for setting range.

Martyn
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Re: Setting the External Trigger Range

Post by Martyn » Fri Oct 05, 2018 9:37 am

The threshold range is fixed at ±5 V for the external trigger input.
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spflanze
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Re: Setting the External Trigger Range

Post by spflanze » Fri Oct 05, 2018 11:07 pm

Then for the External Trigger the appropriate range code is always 8.

But in PicoScope3000aSettings.vi the range code used to convert a voltage in float representation, to the ADC code, is always the same as set for A channel, regardless of which channel is selected for the trigger.

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Re: Setting the External Trigger Range

Post by Martyn » Mon Oct 08, 2018 8:41 am

The vi is an example, based around using a trigger on Channel A, so I would suggest modifying it to suit your requirements.
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