Complex / Quadrature sampling

With UHD, what’s the proper way to use the A and B connectors on an LFRX
to get quadrature sampling? I’ve tried setting subdev spec as A:AB but
it doesn’t seem to work with the UHD source at anything other than 0 for
the frequency for both USRP1 and USRP2 via UHD.

On 05/28/2011 02:01 PM, Brett L. Trotter wrote:

With UHD, what’s the proper way to use the A and B connectors on an LFRX
to get quadrature sampling? I’ve tried setting subdev spec as A:AB but

No, AB is correct, and it all boils down to a simple mux setting:
http://www.ettus.com/uhd_docs/manual/html/dboards.html#basic-rx-and-and-lfrx

it doesn’t seem to work with the UHD source at anything other than 0 for
the frequency for both USRP1 and USRP2 via UHD.

What do you think is wrong?

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