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Re: [Discuss-gnuradio] TX/RX with USRPN200 and GNURadio

From: Carlos Alberto Ruiz Naranjo
Subject: Re: [Discuss-gnuradio] TX/RX with USRPN200 and GNURadio
Date: Mon, 20 Oct 2014 12:33:41 +0200

Another question.

I have a GPS receiver ( http://u-blox.com/images/downloads/Product_Docs/LEA-NEO-6T_ProductSummary_%28GPS.G6-HW-09020%29.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 the power of receiver RF port?

2014-10-20 9:54 GMT+02:00 Carlos Alberto Ruiz Naranjo <address@hidden>:
I have this flowgraph:

sampleTX is a recorded signal of 5 minutes.

2014-10-20 9:23 GMT+02:00 Martin Braun <address@hidden>:
> 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
> 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).


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