I really don't think you should be getting any error messages. Could
you copy the entire error message into an email? I might not be able to
identify the problem, but maybe someone else on the list can. In the
mean time, let's verify receipt of a test signal through the USRP.
I recommend running the example "usrp_wfm_rcv.py", located in
/usr/local/share/gnuradio/examples/usrp/ on my Linux installation. It's
essentially a limited spectrum analyzer. Hopefully you've got access to
a signal generator. Start with a test signal at -40 dBm or so, at L1
(1575.42 MHz) for good measure. The program will likely automatically
select your DBSRX card, but if you need to set specific options, use the
'-help' flag on the command line to see the options. Do you get errors
running this? If so, tell me exactly what they are.
--Paul
Phaysal Khan wrote:
Hi,
yes, I can run the test and it says at the end
Max USB/USRP throughput = 32MB/sec
although it gives that error msg 3 times for each usb throughput check
(3 times for each 2M, 4M, 8M, 16M and 32M).
I am using DBSRX daughter card, which covers the GPS band, and this is
physically installed. I think we are ready to move forward.
Faisal A. Khan
Doctral Candidate
University of New South Wales
NSW 2052, Sydney, Australia
P) +61-2-93854208 M)+61-401-260728
------------------------------------------------------------------------
Date: Mon, 3 Mar 2008 17:02:18 -0500
From: [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
CC: discuss-gnuradio@gnu.org
Subject: Re: [Discuss-gnuradio] GPS on USRP
I'd start by running usrp_benchmark_usb.py It's a USB speed test
script, and it will verify proper communication with the USRP.
The script is located in /usr/local/share/gnuradio/examples/usrp/
on my Linux installation.
Do you have a DBSRX daughter card to receive GPS frequencies? If
that's physically installed and the test script mentioned above
runs, we can move on.
--Paul
Phaysal Khan wrote:
Hi Paul,
Finally I got a working system of USRP radio. The FM radio
example runs smoothly (atleast opens up and captures
nothing:giving errors like "usb_control_msg
failed: usb_control_msg failed: sending control message
failed, win error, A device attached to the system is not
functioning <--- Is this ok? I am using cygwin, gnu-3.1.1 and
python 2.5)!?
Now, I would like to record IF samples and use Kai
Borre Matlab based GPS receiver to solve for
position. Should we proceed with sample recording. Can
you guide me for this?
Faisal A. Khan
Doctral Candidate
University of New South Wales
NSW 2052, Sydney, Australia
P) +61-2-93854208 M)+61-401-260728
------------------------------------------------------------------------
Date: Fri, 29 Feb 2008 12:45:29 -0500
From: [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>
CC: discuss-gnuradio@gnu.org
<mailto:discuss-gnuradio@gnu.org>
Subject: Re: [Discuss-gnuradio] GPS on USRP
Faisal,
I'm at Purdue University working toward using the USRP
for GNSS applications. Check my understanding: are
you wanting to use the USRP to record, say, L1 band
samples directly to a data file? Would you be
performing all of the signal acquisition and tracking
in post-processing with a separate software tool?
I'm working on Linux (Debian), but we aught to be able
to trade notes. If you've got a working installation
of GNU Radio, I can show you how to record samples.
--Paul
Phaysal Khan wrote:
Hi,
I am a newbie to USRP, and still struggling to
get it working on my windows machine. I am trying
to use cygwin. I reckon that many ppl have already
acquired and tracked GPS on USRP. Waht I want to
do is to capture GPS IF samples (e.g. at IF=5 MHz)
and use a software receiver to process those IF
samples on PC. Any suggestions to start?!...
Faisal A. Khan
Doctral Candidate
University of New South Wales
NSW 2052, Sydney, Australia
P) +61-2-93854208 M)+61-401-260728
------------------------------------------------------------------------
Join Lavalife for free. What are you waiting for?
<http://a.ninemsn.com.au/b.aspx?URL=http://lavalife9.ninemsn.com.au/clickthru/clickthru.act?id%3Dninemsn%26context%3Dan99%26locale%3Den_AU%26a%3D30288&_t=764581033&_r=email_taglines_Join_free_OCT07&_m=EXT>
------------------------------------------------------------------------
Find it at www.seek.com.au <http://www.seek.com.au/> Your
Future Starts Here. Dream it? Then be it!
<http://a.ninemsn.com.au/b.aspx?URL=http://ninemsn.seek.com.au/?tracking%3Dsk:het:sk:nine:0:hot:text&_t=764565661&_r=OCT07_endtext_Future&_m=EXT>
------------------------------------------------------------------------
Listen now! New music from the Rogue Traders.
<http://ninemsn.com.au/share/redir/adTrack.asp?mode=click&clientID=832&referral=hotmailtaglineOct07&URL=http://music.ninemsn.com.au/roguetraders>
------------------------------------------------------------------------
Join Lavalife for free. What are you waiting for?
<http://a.ninemsn.com.au/b.aspx?URL=http%3A%2F%2Flavalife9%2Eninemsn%2Ecom%2Eau%2Fclickthru%2Fclickthru%2Eact%3Fid%3Dninemsn%26context%3Dan99%26locale%3Den%5FAU%26a%3D30288&_t=764581033&_r=email_taglines_Join_free_OCT07&_m=EXT>
_______________________________________________
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
