[USRP-users] USRP N210 DDC Sample Data Format

Marcus D. Leech mleech at ripnet.com
Mon Apr 27 11:11:34 EDT 2015


On 04/27/2015 11:08 AM, Patrick DaSilva via USRP-users wrote:
> Hi,
>
> I've been assuming the data format of the sample out from the DDC on the N210 FPGA is an integer 16Bit Complex (sc16, I(16bits), Q(16bits)). Is this correct?
>
> What does setting the cpu_format and wire_format (fc64, fc32, sc16, sc8)  in the Host UHD driver do if anything to this? Does it change the format in the packet router or VITA RX Chain?
>
> Respectfully,
> Patrick DaSilva
>
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The CPU format is entirely on the host side--the USRP knows nothing 
about it.

The wire format changes "stuff" in the FPGA just before (as I recall) 
its injected into the VITA framing.






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