Does DDC perform complex multiplication?

I found two diagrams which seem to indicate different kinds of
multiplication:

http://www.nd.edu/~jnl/sdr/docs/tutorials/6.jpg

http://www.gnu.org/software/gnuradio/doc/ddc.png

I hope the DDC performs complex multiplication because I am feeding it
with one real signal (via BasicRX A:0) and would like to use both I and
Q outputs in my application.

Chris

On Mon, Apr 07, 2008 at 12:15:50PM -0700, Chris S. wrote:

one real signal (via BasicRX A:0) and would like to use both I and Q
outputs in my application.

Chris

It performs the equivalent of complex multiplication.

Eric

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