05-09-2012 06:10 AM
I am using two sensor with different types , one is one sample on demand & other is continuous sample on demand .
If I have use the PCI6713 DAQ Card I am able to generate two different types signals independently . If I have use the PCI6723 DAQ Card I am not able to generate the two different type of signal independently .Is there any difference between PCI6713 & PCI6723 DAQ Card
Sanjeev Ganapati Naik
05-09-2012 06:21 AM
Can you be bit more specific ?. what is the signal you are generating? Analog Output?. If yes you cannot use different configuration at the same instant because the card is using single DAC (I guess).
05-09-2012 06:39 AM
No I don't think that will work. Both are entirely different configuration the card can support one configuration in a task and you cannot have different task for the same output type in the same card.
05-09-2012 07:02 AM
Yes otherwise you can search for cards which has individual DAC for each channel ( But am not sure how good that will work for your requirement ).
05-09-2012 09:18 AM - edited 05-09-2012 09:20 AM
You CAN generate both an AC and DC signal to the different analog outputs. The only thing is that you have to use a single task. If you have a waveform for the ac signal, also use a waveform for the dc. Just have all of the Y values the same. Pretty basic actually.
However, your original post says you have two different sensors and that would imply that you need to read two separate signals - not generate anything.
05-10-2012 10:54 AM
I can't speak to the 6723 board in particular, but I'm pretty sure that many boards with AO would allow you to have exactly one hardware-timed AO task simultaneous with one or more software-timed AO tasks.
This can come in handy if there's a need in your app to occasionally change the DC offset value. It's just easier to deal with than if it were a 2nd channel of a continuous-generation task. However if you *don't* need to change the DC channel value, just do it like Dennis K said. You may have to anyway if the 6723 doesn't the support the mode I've been talking about.