TX/RX with USRPN200 and GNURadio

GNU Radio
#1

Discuss-gnuradio mailing list
[email protected]
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

#2

Discuss-gnuradio mailing list
[email protected]
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

#3

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Ruben is absolutely right! In loopback configuration with devices as
sensitive as the WBX, always use an attenuator. Also, in direct
loopback, you really shouldn’t need the RX gain, and only risk
damaging the daughterboard and in the worst case your USRP’s ADC by
generating too much power.

On 17.10.2014 15:39, [email protected] wrote:

_______________________________________________ Discuss-gnuradio
mailing list [email protected]
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1

iQEcBAEBAgAGBQJUQi2BAAoJEAFxB7BbsDrLHn8H/2ry64VL8rOqoH7WtdlsoKWq
ZC8akgji8XDqz3pqnFQDK0IRXIhi35qBwgxPTZVzgnYgsm8qTTGuO2PJzd6njGQK
QLXp2vjzXlANARShSlWVPGa7lBZvXqOBYxZ/ixQTSaSt4zyOaifF0hOkvYSDvuXN
h285z+eFN9sKo7aGkzkN3oGleqL0R0/YTtUB4IFYVVbG0aOSrtAmL9B9M7MMIHrQ
svP0m5hpF2xtdpCVI2a7XeBm6CpjbH5wle5lXmtJJQCm45iRDC5XTeYfwf+FFj1n
h8oNw6PhThxXx1iB+Kf73GTz50aQFB8Sx38U1TZrIUw5QTF6F8Q/9ce1Z3MEb6Y=
=AniS
-----END PGP SIGNATURE-----

#4

Ok!!

I have Ubuntu 12.04 in this PC
http://www.amazon.com/HP-FF825AV-Workstation-2-8GHz-nVidia/dp/B00B90WIGE
(Quad Core and 12GB RAM).
With the scheme with loop I have:

Generating: “/home/caruiz_ext/Escritorio/generadoresGNU/top_block.py”

Generating: “/home/caruiz_ext/Escritorio/generadoresGNU/top_block.py”

Executing: “/home/caruiz_ext/Escritorio/generadoresGNU/top_block.py”

linux; GNU C++ version 4.6.3; Boost_105300; UHD_003.006.002-64-g92b0b7ab

– Opening a USRP2/N-Series device…
– Current recv frame size: 1472 bytes
– Current send frame size: 1472 bytes
Using Volk machine: sse4_2_64
UUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUU

What is the problem?

2014-10-18 11:06 GMT+02:00 Marcus Müller [email protected]:

#5

Discuss-gnuradio mailing list
[email protected]
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

#6

linux; GNU C++ version 4.6.3; Boost_105300; UHD_003.006.002-64-g92b0b7ab

– Opening a USRP2/N-Series device…
– Current recv frame size: 1472 bytes
– Current send frame size: 1472 bytes
Using Volk machine: sse4_2_64
UU[…more U…]

What is the problem?

Maybe there is none? You don’t write anything about your rates etc., but
U means underrun, which in turn means your computer isn’t producing data
fast enough (or on time).

M

#7

Discuss-gnuradio mailing list
[email protected]
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

#8

On 10/20/2014 12:33 PM, Carlos Alberto Ruiz Naranjo wrote:

Another question.

I have a GPS receiver (

http://u-blox.com/images/downloads/Product_Docs/LEA-NEO-6T_ProductSummary_(GPS.G6-HW-09020).pdf

) with a Osmo board ( http://openbsc.osmocom.org/trac/wiki/osmo-lea6t-gps )

Can I directly connect the USRP (WBX) to the GPS receiver?
Can I damage the WBX board with thepower of receiver RF port?

Carlos,

please don’t mix questions in threads – they get lost very easily that
way. Also, for USRP-specific questions I recommend the usrp-users
mailing list.

You can definitely damage daughterboards with too much rx power. I’m not
sure why you’d connect this board to the WBX – or do you want to
connect it to the REF in ports?

M