Re: howto to set the mux in usrp1

Hi josh,

thank’s for the hint - but this is not quite what I want to do:

In the future I want to use 4 separate inputs - this is for a
network-analyzer with 2 directional couplers for S11, S21, S12, S22.
For a start I want to use only RX-board A with 2 different signals on
both inputs. This implies that the Q-inputs of the DDCs must be
connected to 0.

I guess the subdev spec would be:

“A:A A:B” ?

What would be the setting to use all 4 input?

Thanks

Wolfgang

On 05/26/2013 05:00 AM, Wolfgang Buesser wrote:

How can I control the mux in the RX-path of the usrp1?

Set the subdevice specification to “A:A B:A”. This maps the DDC0 to
dboard A, frontend A and DDC1 to dboard B, and frontend A.

-josh

from gnuradio.eng_option import eng_option

self.head_tx = gr.head(gr.sizeof_gr_complex, 1000000)

    self.head_rx_0 = gr.head(gr.sizeof_gr_complex, 1000)

tb = build_block ()
tb.run ()


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On 05/26/2013 05:49 AM, Wolfgang Buesser wrote:

I guess the subdev spec would be:

“A:A A:B” ?

What would be the setting to use all 4 input?

A:A A:B B:A B:B

The first element is the dboard name, the second is the frontend name.
This is the mapping for DDC0 to DDC3

-josh