Sampling rate per analog input on multichannel scanning

[pat.langlois]

Hi,

I expect to buy a DAQ system soon. I have the following spec for the kind of DAC that I'm looking for:

- At least 50 channels (analog inputs with common reference could work),

- Continuous scan with sampling rate of 24kHz or higher.

The kind of measurements that I have to perform is compatible with your USB-6255 device.

But I don't get from the specification of this product if the sampling rate per channel is a direct function of the fastest sampling rate available (1.25 MS/s for 1 channel) divided by the number of channels during the coontinuous scan. If so, this means the sampling rate per channel would be 25kS/s for 50 channels.

Can you provide a clear statement about it?

My expectation for a clear statement is the following:

I want a way to calculate by my own the sampling rate per each channel to understand if the device could be a good purchase.

Regards.

[Duffy2007 · Accepted solution]

Hello pat.langlois,

page 1 in the specification of the NI 6255

Multichannel maximum (aggregate) = 750 kS/s

This means in your case 750KS/s / 50 = 15 KS/s

[Duffy2007]

Hello pat.langlois,

if you want usb you can use 5x NI 9205 in a cDAQ 9178.

[pat.langlois]

Thank you Alexander for your input. That's exactly the info that I was looking for.

I consider this case as closed with your answer.

Best regards,

Patrick