Multifunction DAQ

cancel
Showing results for 
Search instead for 
Did you mean: 

PCI-6111 to PCIe-6374 analog in 12-bit vs 16-bit

Hi I have a C# client that is using the DAQ MX libraries to read the analog-in using the ReadMultiSample method of an AnalogSingleChannelReader object. The PCI-6111 card's AI was 12-bit and for the PCIe-6374 it is 16-bit.  The data coming back from the ReadMultiSample method is not as expected using the PCIe-6374 so I am wondering if anyone has any thoughts on this? 

0 Kudos
Message 1 of 4
(266 Views)

Could you please elaborate on what you mean by "not as expected"?

 

As long as it returns double values, it is working as expected.

https://www.ni.com/docs/en-US/bundle/ni-daqmx-net-framework-40-api-ref/page/ninetdaqmxfx40ref/html/m...

 

The bitness of the ADC has an impact on the resolution of the measurement and not the data type of the measured value.

Santhosh
Soliton Technologies

New to the forum? Please read community guidelines and how to ask smart questions

Only two ways to appreciate someone who spent their free time to reply/answer your question - give them Kudos or mark their reply as the answer/solution.

Finding it hard to source NI hardware? Try NI Trading Post
0 Kudos
Message 2 of 4
(233 Views)

I have a pure higher-level software background so this is a bit out of my wheelhouse, but the input going into the NI card is from a SED (secondary electron detector).  With the PCI-6111 I get a nice smooth image with nice smooth transitions between dark & light areas of the image.  When using the PCIe-6374 with no other software changes the images that I am getting show a minimal transition between light and dark areas with much of the image washed out.  I am getting essentially the same image with either card but the PCIe-6374 lacks detail.  I would expect there to be more detail in images coming from the PCIe-6374 card.

0 Kudos
Message 3 of 4
(224 Views)

Both instruments vary substantially in specifications, and "hopefully," whoever decided to replace 6111 with 6374 considered those differences and their impact on the measurements.

 

https://www.ni.com/docs/en-US/bundle/pci-6110-6111-specs/resource/370980a.pdf

https://www.ni.com/docs/en-US/bundle/pcie-6374-specs/page/specs.html

 

Do you know if the wiring is correct?

Santhosh
Soliton Technologies

New to the forum? Please read community guidelines and how to ask smart questions

Only two ways to appreciate someone who spent their free time to reply/answer your question - give them Kudos or mark their reply as the answer/solution.

Finding it hard to source NI hardware? Try NI Trading Post
0 Kudos
Message 4 of 4
(208 Views)