myRIO aggregate sample rate

[Tori.M]

Hi Forums,

Quick question, the myRIO AI sample rate is 500kS/s aggregate on the MXP connectors (A and B).

My current thoughts are that connecting to inputs on AI0-AI3 on MXP connector A, would give me 125kS/s per channel, therefore ~ 62.5kHz bandwidth (please correct me if I'm wrong).

What I'm trying to work out, is whether the 500kS/s gets split between the total inputs shared between MXP A & MXP B; or is it 500kS/s aggregate per connector? I.e. If I split my inputs to AI0-AI1 on MXP A; and AI0-AI1 on MXP B, would I be able to increase my sample rate per channel?

Kind thanks,

Tori

[Kristoff2 · Accepted solution]

 Hey Tori,

Here is a thread on a similar question: http://forums.ni.com/t5/Academic-Hardware-Products-ELVIS/Question-about-myRio-Hardware-ADC-DAC/td-p/...

Any I think my answer in that thread (copied below) should answer your question:

The best way to think about the myRIO hardware is as if it has two ports the MSP and MXP (don't distinguish between A and B on the MXP connectors).

The MSP AI, MXP AI, and Audio In (ie all the AI) share the same ADC.

The MSP AO and Audio Out each have their own DAC but share an SPI line.

The MXP AO has its own DAC and has its own SPI line

Let us know if you have additional questions!

-Sam K

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