Analog input weirdness

comedi version 0.7.68.1                                                                                                                                                     
driver name: ni_pcimio.c                                                                                                                                                    
board name: NI pci-6014                                                                                                                                                     
                                                                                                                                                                            
Is it normal for an analog input to increment, even when no input is applied?                                                                                               
Using the inp.c demo from the comedlib shows the weirdness.                                                                                                                 
                                                                                                                                                                            
if i reset it...                                                                                                                                                            
#/usr/local/bin/comedi_calibrate --reset                                                                                                                                    
                                                                                                                                                                            
this is what i get.                                                                                                                                                         
                                                                                                                                                                            
demo # ./inp                                                                                                                                                                
40515                                                                                                                                                                       
demo # ./inp                                                                                                                                                                
40554                                                                                                                                                                       
demo # ./inp                                                                                                                                                                
40586                                                                                                                                                                       
demo # ./inp                                                                                                                                                                
40614                                                                                                                                                                       
demo # ./inp                                                                                                                                                                
40644                                                                                                                                                                       
demo # ./inp                                                                                                                                                                
40672                                                                                                                                                                       
demo # ./inp                                                                                                                                                                
40707                                                                                                                                                                       
demo # ./inp                                                                                                                                                                
40738                                                                                                                                                                       
        
                                                                                                                                                                   
all of the other functions (analog out, digital io) seem to work.                                                                                                           
is there something i am missing?                                                                                                                                            
                                                                                                                                                                            
thanks.                                                                                                                                                                     

-- 
"No government has the right to decide on the truth of scientific
principles" - Richard P. Feynman (May 11, 1918 - February 15, 1988)

Received on 2004-08-27Z22:18:51