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[Discuss-gnuradio] mux on usrp Tx side

From: Achilleas Anastasopoulos
Subject: [Discuss-gnuradio] mux on usrp Tx side
Date: Fri, 08 Jun 2007 19:53:50 -0400
User-agent: Mozilla Thunderbird 1.0.2 (Windows/20050317)

I understand the purpose of the mux on the rx side of the usrp.

I have a question regarding the tx side of the usrp.
In particular, it is not clear to me what the purpose of the mux
is on the tx side.
My understanding is that the samples from the USB (say complex)
are interpolated by N in the FPGA, then further interpolated
by 4 in the DAC chip (to reach 128Msps), then digitally up-converted and then digital-to-analog converted.

where is the Mux in this chain? and what does the default value 152 represent?


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