Re: How to do with AREF_DIFF of CR_PACK?

Hi,

  I found how to do. That is a question about signal connections about DAQ
card.

  I use comedi-0.7.66. , Redhat 8(linux kernel 2.4.20) and NI-6071E.
  "PCI E Series User Manual" says that (Chap 4 signal connection, 4-12)

In differential
mode, signals connected to ACH<0..7, 16..23, 32..39, 48..55> are
routed to the positive input of the PGIA, and signals connected to
ACH<8..15, 24..31, 40..47, 56..63> are routed to the negative input of
the PGIA.

  That is to say, just in code,

chanlist[0]=CR_PACK(0,range,AREF_DIFF);

and connect signal(input 1) with ACH 0 and reference(input 2) with ACH 8.
(other detail, please read User Manual with your DAQ card.


Best regards,

Cheng-Ling Kuo(³¢¬FÆF)

Tel:+886-6-2757575-65276
Fax:+886-6-2096035

Assistant Engineer
Science Data Distribution Center
ISUAL Project, The Scientific Payload of ROCSAT-2
Department of Physics
National Cheng Kung University
(http://www.phys.ncku.edu.tw)

Received on 2003-05-24Z13:44:07