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USRP modify carrier frequency

Hello, I am a student studying the USRP N200 model.


I tried the rough TX/RX functions, and I'm wondering if it's possible to change the signal equation, so I decided to leave a message.

And I use this code. 





I confirmed in the guide that the signal equation for this device is


s(t) = a(t)cos(2π(carrier frequency)t + Ø(t)).


I would like to create


s = b(t)∑cos(k*another carrier frequency)*t + Ø(t)).

Here, b(t) is a different constant, and ∑ is from k=0 to n.


Is there a way to modify this in the block? I can't seem to find a direction, so I'm writing for advice. Thank you.

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