Is there a way to write and acquire analog signals during while acquiring N samples at the same time? In the (3 of 4;4 of 5) acquisition step in the program I posted, I would like to read another analog in. It only needs to have a rep. rate of ~2-5 Hz. Writing an analog out would also be nice but not immiediately necessary. I use the N samples because I need a fast and precise aquisition timing of 1kHz for the PMT array. I process the data with FFT after which is why that acquisition is so important. I tried separating the two programs but the analog in still fails. The analog in desired is the Current Monitor seen earlier in the program. And the analog out desired during the acquisition step is the HV out portion in the very beginning.
Can you expand on the devices that you are connecting to with this VI? That will help in deciding what capabilities you have as far as reading and writing at the same time. In several cases, you can read and write multiple channels, but some devices have limitations.
All the connections are made to a NI PCI-6221. The N Samples acquired at 1000 Hz is a Photomultiplier Tube. The Analog in that I would like to add is just an on demand voltage measurement, and the analoge out is the remote adjust to a high voltage power supply.
I am working with Lab View 8.5 and I don't believe parralell loops exist until 2009. Would that actually allow me to display my one analog in in the Front Panel while the other aquires 15k samples at 1k Hz into a buffer?
Fair enough. I didn't realize you were using 8.5. Ok, so what seems to be preventing you from using this DAQ device to do what you need? Are you getting an error message, bad data, or no data?
So my solution was to split the two other parts I wanted to add into a different program. The programs comunicate and keep track of each other via a global boolean. But the analog in gives me entirely wrong values while the buffered acquisition is running. I could post those both if it would help.
