no signal acquired.

Obtaining data from various hardware devices
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Rapten
Posts: 22
Joined: Fri Apr 15, 2011 11:27 am

no signal acquired.

Post by Rapten »

Hi,
I got the driver listed and tried connecting the device as well.
the connection gets established along with a warning about the drift being too high. The settings are as follows:
settings.JPG
settings.JPG (44.15 KiB) Viewed 2512 times
The main concern is that no data is displayed, even in a simple scenario like this:
design.JPG
design.JPG (6.95 KiB) Viewed 2512 times
I'm also not sure about the acquisition server hostname, do we need to change it ?


And the screen displays this:
display.JPG
display.JPG (241.54 KiB) Viewed 2512 times

lbonnet
Site Admin
Posts: 417
Joined: Wed Oct 07, 2009 12:11 pm

Re: no signal acquired.

Post by lbonnet »

Hello Rapten !

Your scenario is good as the signal display is actually displaying something.
If the connection between acquisition server and client is wrong, the signal display is just blank.
The Acquisition server is detecting a high drift and corrects the signal automatically. This is normal as the Emotiv EPOC is sampled at 128Hz, and default drift correction occurs at 2ms (i.e. 1 sample is enough). Change the drift tolerance to 10 ms, it's a relevant setting value for that device.

You are indeed acquiring signal. The headset is just sending constant, and I assume High level values on all channels.
Other users are experiencing the same (Cent and Nathali on this forum), and we are trying hard to solve this !

I move these posts in this previous one. To centralize everything.

Cheers

Laurent-

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