I am considering to buy a PXIe 6124 to replace a PXI 6115 as I am the later in a continous DAQ application that requires only 4 MS/s/ch but needs true diferential inputs. But I have a couple of questions:
First, according to PXIe 6124 specs it seems that it has some programmable antialiasing filters http://sine.ni.com/nips/cds/view/p/lang/es/nid/206514
But I have not been able to get any information about them in the user manual... is it an error in the specs?
Second, I am very concerned with the limited on board memory of the PXIe 6124. Is it possible to upgrade it, or are there any plans for doing so in the near future? I am very suprised that it includes such an small memory for that high data throughput (4 MS/s/ch x 4 ch x 2B/s = 32 MB/s). This means that the program must be able to read data (empty the internal memory) each 1 ms when acquirinrg 4 channels at full speed. I understand that bus bandwidth is not a problem due to the use of PXIe but nevertheless it limits very much the processing time available for continious acquisition applications running in Windows
Thanks. Best regards
