How to find envelope of signal for all points?

[mujo]

Hi,

I have signal with app. 180 000 points (measurements). When I use analysis\ envelope I get envelope only for 10-15 points of this signal. Why?

Can somebody help me.

Regards

Emir

[Twigeater]

Hello Emir!

The ChnEnvelopes command determines the min/max values in the with DXPeak variable given intervall. The result channels will usualy be significant shorter than the input channels! The result channel pairs for min and max will differ in length as well. Vary the DXPeak value to get the right setting for your calculation.

Hope this help

Matthias

[Twigeater]

Hello Emir!

If you need envelope channels with the same length as the input channels you can use the ChnMapLinCalc command after ChnEnvelopes command with the envelope channels as input (Parameter 1+2) and the original x channel as the supporting points (3rd Parameter). You have to call ChnMapLinCalc twice one for the lower and one for the upper envelope.

Matthias

Message Edited by Twigeater on 02-05-2008 12:46 PM

[mujo]

Thank you very much for fast answer. But , I am beginner and I use Diadem 10.0 only few days. I can use only grapgical command in this moment. How can I do it with my signal that I am sending. Thank you very much.

Regards

Emir

[Twigeater]

Hello Emir!

All necessary commands can be executed in the analysis device without scripting. At the moment I only have a German at hand but the dialogs will look similar in an English version of DIAdem. The menu command for the linear mapping is two items above the one you use for the envelope calculation. After loading your data into DIAdem ('Channel 1' and 'Channel 2') three steps are neccessary:

1. Calculate the envelopes:

2. Map the upper envelope to the original x input channel

3. Map the lower envelope to the original x input channel

You get two result channels for the upper and lower envelope with your first input channel ('Channel 1') as x channel. The analysis device should look like the screenshot in the next reply.

Matthias

Message Edited by Twigeater on 02-05-2008 03:52 PM

Message Edited by Twigeater on 02-05-2008 03:55 PM

[Twigeater]

Message Edited by Twigeater on 02-05-2008 03:53 PM

[mujo]

Thank you very much for help. I did not try but I hope it will no be more problems.

Emir