08-10-2004 02:31 PM
1) What is the unit of the A/D Read? For a channel I specified as +5V/-5V, I get readings of +30000/-30000 for inputs of +4V/-4V.
2) What is the source of DC bias and noise in the channel, and what are some techniques for compensation? Remember, I have jumped out this channel just to look at the noise in the UMI/controller. The only controls I see on this channel are en
able/disable and a choice of fixed ranges.
I want to use the A/D Read function to read a conditioned LVDT signal, then use the value to command a servomotor, but now the signal is too noisy. I would like to avoid extensive averaging, as this is a real-time application (and the spikes have too great an effect even on the average). The LVDT signal after conditioning (3rd-party hardware) appears clean in comparison.
Thanks.
08-11-2004 01:27 PM
08-11-2004 02:05 PM