Why does the Math Channel save twice as many datapoints than my actual data channels when I export it?

[Lesach]

I have data on channels 1 and 2 and also have the math channel (A + B) selected.

When I export data, it saves twice as many data points for the math channel than the others. Why is this?

Note, I am using Sample, not Peak Detect.

If anybody could answer this I would be very grateful.

[JoeFriedchicken · Accepted solution]

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Lesach wrote:

I have data on channels 1 and 2 and also have the math channel (A + B) selected.

When I export data, it saves twice as many data points for the math channel than the others. Why is this?

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Which version of the application are you using -- 1.0, 1.1, or 1.2?

In versions 1.0 and 1.1, the math channel did linear interpolation between samples to help support cursors and measurements. In 1.2, we improved the cursors and were able to remove the linear interpolation.

Regardless of your application version, the timestamp associated with each sample will indicate when the sample was taken.

[Lesach]

Hi JoeFriedchicken,

Thanks for the response, I am running firmware version 1.0.1f0.

So is it possible to upgrade to remove this issue?

I can get around it for plotting in MATLAB etc... but I just wanted to know what was happening.

Thanks again!

[JoeFriedchicken]

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Lesach wrote:

Thanks for the response, I am running firmware version 1.0.1f0.

So is it possible to upgrade to remove this issue?

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Yes -- open the File menu and choose Search for firmware update.

Since you're on version 1.0.1, you will need to update twice -- first to 1.1 and then to 1.2. There was a firmware bug in 1.0 that prevented larger firmware images being applied; but from 1.1 and later, any firmware image can be applied.

[Lesach]

Superb! Thank you