Problem with multiple channel sampling from Michael Carley on 2004-07-21 (gmane.linux.comedi)

From: Michael Carley <m.j.carley_at_bath.ac.uk>
Date: Wed, 21 Jul 2004 17:56:04 +0100 (BST)

Hello,
      I have a problem with a NI-PCI-MIO-16E card if I try to take
data on more than four channels. I am calibrating microphones in an array
and when I sample on 1 (or 4) channel(s), the calibration signal (a 1kHz
sinusoid) is fine. If I sample on more channels, the sampled signal is
distorted and its spectrum looks like a 2kHz sinusoid. I am using the code
from cmd.c to read() from the device.

Has anyone seen this before and do they know what is causing it?

Thanks.

-- 
E' la storia di un pasticciere, trotzkista, un pasticciere trotzkista
	   nell'Italia degli anni '50. E' un film musicale.

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Received on 2004-07-21Z15:56:04