FYI: 611x board initialization

Dear all,

here is a small observation in using the NI 611X boards with comedi,
which may benefit other users:

In some PCs, there appears to be a consistent tendency of these boards
to return AI data sampled at some 500 Hz, no matter what the desired
sampling rate.

It seems, that comedi does not initialized the boards correctly,
because running NI's own Linux examples
(s. http://digital.ni.com/express.nsf/bycode/exyv4w?opendocument&lang=en&node=seminar_US)
after booting and ahead of using comedi fixes the problem reliably.

Best wishes,
Rolf

-- 
Rolf Mueller, rolf.mueller_at_uni-tuebingen.de
Biosonar Lab, Tuebingen University,
Morgenstelle 28, 72076 Tuebingen
Phone +49 7071 29-74838  Fax. +49 7071 292618

Received on 2003-03-10Z17:26:34