• 0
Andras

Feature request: high density value display on charts

Question

Hi,

I use the Spectrum Analyzer's FFT for a variety of tasks and I really like the high resolution capabilities of Analog Discovery 2. If I set the BINs of the FFT something big like 4.097k or 8.193k the problem is that I can't set my display to have as many columns on the chart to show them all.

If I understand it correctly the FFT with the setting of 8193 BINs will divide the range (from Start to Stop) into 8193 small segments and the FFT will generate 8193 datapoints. These datapoints will be displayed on the chart. If you have a monitor resolution like me, you have 1920 pixels horizontally from which approximately 1700 will be used as the active region of the chart.
This means that we got (8193/1700=)4.8 datapoints for every column on the chart. I suppose WaveForms displays the average of those datapoints, but that means that we are unable to see any extremely high or low values because they got averaged out.

My request would be to have an improved display of those datapoints on the chart. Design-wise it could be done in different ways, for example Grafana has a chart where you can see min, max and mean values instantly by using a solid line for mean and semi-transparent filling for min and max values:

image.png.0aa48a929614b2349036fa549a007b1d.png

 

Would you consider improving the chart this way?

 

Regards,

Andras

Share this post


Link to post
Share on other sites

2 answers to this question

Recommended Posts

  • 1

Hi @Andras

No. The WaveForms application does not do averaging in plots, does not hide information, it draws vertical lines (min/max) for samples falling in the same display x-column. You actually get a thick band for nosy signals.

image.png.b723c80d9c2cf9b44796a1c9fb2387ad.png

image.png.f2ad2ee75d88ce2032285e0f0f209b72.png

image.png.9c05fefa792c50ad7803da9fd3dfcaa7.png


The Scope interface by default stores averages samples (can be adjusted under each channel gear drop-down) and also collects lower resolution noise (min/max) samples which are indicated by a transparent band. Here the normal samples are also drawn with band.

image.png.679a6cf3e2d589fd99ed280d190f6869.png

image.png.2a77e724e528635bd4af5fca98606f74.png

image.png.1a3756ea0c32019d3d93a2d737746ed4.png

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now