Display signal from oscilloscope on Waveform Chart has problem

[yangyi]

Hi GerdW,

Thanks.

After reopening the test VI, the charts show as yours. But in my initial VI, the charts still cannot display normally... Here is what display in the case of setting AutoscaleX as well as without autoscaling it....

Yangyi

[GerdW]

Hi yangyi,

so we are back to one of my first messages: you need to show (and examine) which data you send to your chart(s)!

Can you provide a file with some of that data saved? Can you show a textual display of that data so we can examine what's inside those wires?

[yangyi]

Hi GerdW,

Here are the data files and pictures

Thanks,

Yangyi

[GerdW · Accepted solution]

Hi yangyi,

your "data from chart" show strange timestamps: according to Excel the timestamps are rounded to a resolution of 1ms. No wonder your charts look strange too, display a lot of data points (well, 50 samples) for the very same timestamp…

The "data after Index" look much better, with original 20µs time resolution!

In general all timestamps look strange with a date of Jan, 1st 1970.

[yangyi]

Hi GerdW,

But the display of chart on the front panel which has connected to the index channel DBL looks strange..although the "data after index " looks good. 

Is there a method that I can modify the timestamp of the waveform?

Thanks,

Yangyi

[yangyi]

Hi GerdW,

After adding generate waveform block, the display of charts look good while running. 

Thank you so much!

Yangyi