URGENT :Using AI_Read_Scan with VC++

[Kalpit Desai]

I am using PCI-6052E to read 5 analog input channels simultaneously.
For some reasons, I want to use AI_Read_Scan function. "NI-DAQ Function Reference Help"
says that this function scans at half of the max rate of device. I don't understand what this exactly means.
After how many samples/ scan cycles will AI_Read_Scan return? Documents says that the array "read" will be having lenth equal to no of channels specified in scan_setup. Is the array "read" two dimensional?What will be the length of other dimension?

Thanks

[Sastry V.]

Hello,
From what the help says, it means that on a single channel the maximum rate R you can achieve is half the maximum rate specification Rmax. But for multiple channels in that case should be R/N.

My suggestions would be, in that case, use the low level functions. Many many examples are there in c:\program files\national instruments\ni-daq\examples\visualc folder.

The array dimensions will be (no. of channels, no. of samples per channel). If you are acquiring form 6 channels at 500 samples per channel, then the dimensions will be (5,500).

Sincerely,
Sastry V
Applciations Engineer
National Instruments