Instead of asking if this is possible, I would ask if this is necessary. If you are just averaging the data, there is no reason to acquire at 10 MS/s. I assume you are using a portion of this data for some sort of analysis or storing it for later use.
Perhaps you could use a slower speed card and an averaging filter to monitor the data, then use the high speed card to grab the block of data you need. If the events being monitored are not predictable, you could use a circular buffer to acquire 3 seconds worth of data for each channel into onboard memory. Whenever you need the data, you could download it into the computer's memory. I don't know if this would work with your application, but it is probably worth looking at alternative strategies for acquiring the data you need with lower overhead. Bruce ------------------------------------------ Bruce Ammons Ammons Engineering www.ammonsengineering.com (810) 687-4288 Phone (810) 687-6202 Fax -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of E. Blasberg Sent: Tuesday, February 10, 2004 9:30 AM To: [EMAIL PROTECTED] Subject: 60MS/sec- is this possible? Hi All, This may sound naive, but I have a customer who wants to sample up to 6 channels across 3 boards (2 channels/board) at a sampling rate of 10 Megasamples/sec/channel (i.e., 60 MS/s in total). Three different units are being measured simultaneously, which is why 3 boards are necessary (they don't all start or stop at the same time, but they could all be on at the same time). Currently the system measures 50KS/s/channel with no problem (plus up to 2 channels of AO). The data is averaged each second and put into a FIFO buffer which is usually 2 minutes (120 samples) long. Every 2 seconds, the FIFO is averaged (to get a running average). I should add that a GPIB data logger is read every 2 seconds for slower data. My NI rep has suggested the PCI-6115 whose specs could certainly handle this. What I'm worried about is the computer keeping up with averaging 60MS/s. Anyone have any experience using these data rates over an extended period of time (measurements can last WEEKS). Much TIA, E. Blasberg iDAQ Solutions Ltd
