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Re: [Discuss-gnuradio] Broken WBX?

From: Matt Ettus
Subject: Re: [Discuss-gnuradio] Broken WBX?
Date: Wed, 03 Feb 2010 14:23:17 -0800
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv: Gecko/20100120 Fedora/3.0.1-1.fc12 Thunderbird/3.0.1


Doe your USRP have a serial number below 500? I know you've been a longtime user, so yours may be that old. If so, the WBX won't work for you since USRPs under #500 do not send a clock to the daughterboard, and the WBX needs one.

Also, note that in the following command:

 WBX (RX antenna): ./usrp_fft.py -R A -f 940.2M -d 64 -g 35 -A RX

it should read "-A RX2" on the end.


On 02/03/2010 01:45 AM, mike wrote:
Hi Guys,
I have recently received a WBX and am struggling to get it to work.
Please see the following screenshots:

http://www.flickr.com/photos/address@hidden/sets/72157623341034652 shows a
very strong GSM base station at 940.2MHz.  As you can see, the DBSRX
works perfectly but the WBX (using the same antenna) receives nothing.
http://www.flickr.com/photos/address@hidden/sets/72157623341037644 shows
my WBX receiving nothing over 930-960Mhz using the same antenna as the
DBSRX.  The spikes seen on the WBX are drifting signals which don't go away.
The 88-108MHz FM broadcast band cannot be received by the WBX either,
although my TVRX receives it fine. Changing the gain, frequency and
antenna port doesn't do anything apart from alter background RF levels.
I have compiled from the latest trunk using the git repository, running
ubuntu 9.04 32 bit.

Here are the commands I have been using:

DBSRX: ./usrp_fft.py -R B -f 940.2M -d 64 -g 35
WBX (TX/RX antenna): ./usrp_fft.py -R A -f 940.2M -d 64 -g 35 -A TX/RX
WBX (RX antenna): ./usrp_fft.py -R A -f 940.2M -d 64 -g 35 -A RX

Have I received a broken WBX or am I missing something obvious?



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