Onboard Input Buffer Size

[ASharma]

I see from the specifications of the DAQCard-6062E that it's supposed to have an onboard analog input buffer of 2048 samples.  However when I read the "Input.OnbrdBufSize" property (available through the DAQmx Buffer property node) it tells me the onboard input buffer size is 8192, i.e. 4 times larger than specified.  I believe the units are Samples.  Am I reading the specifications wrong?

[andre.buurman@carya]

I interpret the specs just as you do, if the "Input.OnbrdBufSize" property is indeed read from the "DAQCard-6062E" board. Although 4 times is "maybe" coincidental the same of a sample stored in the device. 1 sample is 4 bytes.

[Brooks_C]

Hello 2and4,

I believe that the 2,048 buffer is actually specified as the analog output buffer size assuming you're looking at page 6 of the DAQCard-6062E Specifications.  I tested this out using the Output.OnbrdBufSize property and found that it reads 2048 as expected.  While the analog input buffer size isn't mentioned in the specifications or E Series user manual, I would assume that the value this property node returns is correct for the input buffer.

I hope this helps, and have a great day!

Cheers,

[ASharma]

Thanks to all for your responses.  I think Brooks is right.  When you look up the 6062E on ni.com, the specifications summary for the 6062E makes it seem the onboard memory size for Analog Input to be 2048 samples (https://www.ni.com/en-us/support/model.daqcard-6062.html).  This is probably a typo.  I'll assume the valule returned by the Property Read is the correct buffer size.

Thanks...

[Brooks_C]

Hello 2and4,

I think that you may be right about the typo.  I will look into it and if necessary submit a web request to get it corrected then I'll let you know in this post.

Thanks,