Hi Dan,
What daughterboards are you using?
Thanks,
Written
Dan Halperin wrote:
Hi all,
I'm just beginning grad school and trying to get my USRP board up and
running so I can start playing. I've tested our equipment on two
different machines now; one an older box running FC4, 512MB ram, with an
Intel(R) Celeron(R) CPU 2.40GHz. I've also tried one on a newer laptop
(compaq v3000 series) running Gentoo Linux, with 2GB of memory. I've had
/all kinds/ of interesting phenomena:
I first tried installing the way on the old wiki
http://www.comsec.com/wiki?UniversalSoftwareRadioPeripheral (first link
on Google for USRP), and then again using the new say (svn source
checkout using the instructions on the new wiki), on both machines. On
the older machine, I don't get any rx/tx over/underruns (or maybe just
one when initializing) and a throughput of 32MB/s in both directions,
and on the laptop I get exactly 41 under/over runs with a throughput of
~31MB/s in the RX direction and around 24 in the TX direction. As far as
I could tell, these used the same version of the source, but then again
the SVN repository has jumped from rev. 3772 to rev. 3785 since
yesterday morning.
Anyway, installation, make check, and the ./test_standard_?x scripts
work fine (the LED behaves as expected and the benchmarks seem
reasonable), however I get nothing when running the usrp_oscope or
usrp_wfm_rcv scripts as directed in the instructions. Both dial tone
scripts work fine, by the way. The scope and FM receive scripts run
fine, but I hear just hear/see static. If I set the oscope to 900MHz and
bring my cordless 900MHz phone around, there's no change in the scope.
If I can the entire FM spectrum in the other script, I don't get
anything but static anywhere. My little portable CD player can hear the
radio just fine in this lab, so I figure the foot-long copper antenna
that came with the USRP ought to as well. I don't know a lot about
communications...
Also, the different test_digital_loopback and test_counting scripts seem
to not work very well at all. I don't know if they're expected to, but
about 50% of the tests that look vaguely "expected 517, got 0" fail.
Is there any advice you can offer as to how to determine what, if
anything, is wrong here?
Thanks,
Dan
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