Re: AD conversion time too long for Advantec PCI 1710 board

From: Tim van Zon <zon_at_knmi.nl> · Date: Wed, 24 Oct 2007 06:20:26 +0000

Hi Francisco,

could you try to read 6 million samples instead of 6? (should take about 
48 seconds :-) ) I expect that there is a lot of overhead for 
initializing the card and furthermore, I think that the timing is not 
that accurate as well.

Tim

Francisco Mota wrote:
> Hi folks,
>
> We are having the following problem with Advantec PCI 1710 AD/DA 
> Board:  The AD convertion time interval is being much greater than 
> specified in the manual. We made a test with 06 (six) consecutive 
> readings in the AD channel and the total time spent was more than 
> 100us. Looking in the manual we saw that the AD conversion time is 
> 8us, so, we should have 48us in average. Does anybody has had this 
> problem before? any help will be appreciated.
> Our configuration is:
> Pentium IV 2800 MHz, 512 RAM, running Linux Slackware 10 - Kernel 
> 2.6.8.1 with RTAI 3.1, Comedi 0.7.70, Comedilib 0.7.22
>
> Thanks,
> Francisco Mota.
>
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