Forum: GNU Radio USRP2 RX2 Antenna Selection For fullduplex

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3d593de8acbe2510722af740d8668352?d=identicon&s=25 Firas A. (Guest)
on 2009-02-01 11:40
(Received via mailing list)
Hi,

I want to do a full duplex transmission/reception using USRP2. According
to
:

http://www.nabble.com/Re%3A-USRP2-fullduplex-opera...


Hamfred wrote that he did it by patching
gnuradio/usrp2/firmware/lib/db_rfx.c file as follows:

In struct db_rfx_xxxx_rx db_rfx_xxxx_rx = {

Replace

 .base.atr_txval = 0,
 .base.atr_rxval = MIX_EN,

By

 .base.atr_txval = MIX_EN | ANT_SW,    // Patch FULLDUPLEX
 .base.atr_rxval = MIX_EN | ANT_SW,    // Patch FULLDUPLEX




I did this modification (with full compilation and installation) but it
is
not working. Using usrp2_fft.py, I still get the signals only when I
connect
the antenna to TX/RX SMA port.

Where and what I should modify in usrp2/firmware files to do this
hacking. A
help will be appreciated.


Best Regatds,

Firas

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