Throughput question?

[Labview user name]

I was asked to build a pc based data aquisition system to replace a sun
workstation that is going out of service. The problem is that this
workstation collects 100 channels @ 8 kHz continuously. That works out to
be roughly 800 kHz aggregate. I seem to remember that NI has boards that
peg at about 333 ks/s. So 3 of them should get the scan rate I need.
Programming 3 boards can get messy, so I am a bit shy of going this route.

Any suggestions? Reply to group.

[Greg_McKaskle2]

> I was asked to build a pc based data aquisition system to replace a sun
> workstation that is going out of service. The problem is that this
> workstation collects 100 channels @ 8 kHz continuously. That works out to
> be roughly 800 kHz aggregate. I seem to remember that NI has boards that
> peg at about 333 ks/s. So 3 of them should get the scan rate I need.
> Programming 3 boards can get messy, so I am a bit shy of going this route.

You should visit the NI web site. Lots of boards have been released since
you last looked. The site is www.natinst.com.

Greg McKaskle

[Carl Nybro]

We have boards that are much faster than 333K. I would recommend you go to
http://www.natinst.com/daq/ddonline.htm and run the online configurator for
your application. Then, call 800/433-3488 and have a sales engineer go over
the application with you.

Regards,
Carl Nybro
NI

Labview user name wrote:

> I was asked to build a pc based data aquisition system to replace a sun
> workstation that is going out of service. The problem is that this
> workstation collects 100 channels @ 8 kHz continuously. That works out to
> be roughly 800 kHz aggregate. I seem to remember that NI has boards that
> peg at about 333 ks/s. So 3 of them should get the scan rate I need.
> Programming 3 boards can get messy, so I am a bit shy of going this route.
>
> Any suggestions? R
eply to group.

[CSIRO User]

Well, you could use the PCI-6701E card. It has 64 single ended or 32
differential analogue input channels (so you would need two cards for single
ended operation and probable 4 for differential operation). The card samples
data at 1.25 MS/s (mega samples per second) at 12 bits and is capable of
streaming the data to disk at this rate (depending on your hard drive). Check
out the national instruments web page (www.natinst.com) and look up the data
sheets for the card. Note for your application, you would only need to have
each card sampling at 400 kHz.

cheers

Labview user name wrote:

> I was asked to build a pc based data aquisition system to replace a sun
> workstation that is going out of service. The problem is that this
> workstation collects 100 channels @ 8
kHz continuously. That works out to
> be roughly 800 kHz aggregate. I seem to remember that NI has boards that
> peg at about 333 ks/s. So 3 of them should get the scan rate I need.
> Programming 3 boards can get messy, so I am a bit shy of going this route.
>
> Any suggestions? Reply to group.