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Re: [Discuss-gnuradio] Switching of UHD/Raw-Ethernet Driver

From: Josh Blum
Subject: Re: [Discuss-gnuradio] Switching of UHD/Raw-Ethernet Driver
Date: Thu, 18 Nov 2010 09:10:22 -0800
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv: Gecko/20101027 Thunderbird/3.1.6

On 11/17/2010 11:27 PM, Bishal Thapa wrote:
I have two small questions...

1. I successfully installed UHD (gr-uhd) following the guide "
      But now, I want to be able to switch back and forth between the UHD and
Raw-Ethernet Driver. Do I need to uninstall the UHD, or just using (burning
the SD card) the respective firmwares would do the trick? I just wanted to
make sure that when i am thinking that i am using the raw-ethernet driver, I
am not in anyway getting hampered by UHD's presence. Thank you for your

Just swap the contents of the SD card.

2. I am using XCVR2450 with USRP2. I initially just wanted to find out which
antenna (J1 or J2 -- connected to RF2 and RF1 in my USRP2 respectively), was
defined to be RX and which one to be TX? I found out from a file
"db_xcvr2450.cc" that J1 was defined to be RX and J1-TX, however with my
spectrum analyzer I found the contrary to be true. Is there an easy way to
check, and be able to set J1 or J2 to Rx or Tx in Python? I did search the
threads and couldn't find satisfying answer.

It depends how you set the antennas:


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