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Re: [Discuss-gnuradio] USRP/TVRX setting for ATSC receiving

From: Eric Blossom
Subject: Re: [Discuss-gnuradio] USRP/TVRX setting for ATSC receiving
Date: Wed, 29 Mar 2006 19:21:27 -0800
User-agent: Mutt/1.5.9i

On Wed, Mar 29, 2006 at 04:36:09PM -0800, mao mao wrote:
> The problem is, I haven't setup a full gnuradio
> environment. I was using Windows, with libusb for win.
> I was able to run test_usrp_standard_rx.cc, but only
> get 16MB/s for the following setting:
> center freq = 43.75e6
> mux = 0xf0f0f0f0
> format = 0x300,    //make_format(16, 0,true, false)
> channel = 1
> decim=8;
> adc_freq = 64000000
> my TVRX board was on RX_A. 
> Is there anything wrong with my setting?

You mean outside of the windows part?  (only half kidding...)

test_usrp_standard_rx.cc doesn't know how to talk to the
daughterboards and tune the front end.  You really want to use

Have you tried running usrp_fft.py and/or usrp_rx_cfile.py?

I'm not sure what throughput anybody's seen on windows.  If you can't
sustain 32MB/sec across the USB, you're dead in the water for HDTV.

I strongly suggest installing a GNU/Linux distribution.  That's the
platform where the primary development takes place, and where we know
(with a suitable EHCI controller) we can sustain 32MB/s across the
USB.  I currrently like SuSE 10.0 and Mandriva 2006.  Other have been
had success with Ubuntu and Fedora Core 4.  If you go with SuSE 10.0,
spend a few bucks and get the paid-for version.  It will save you a
ton of time.

At a minimum you're going to need gnuradio-core, usrp, gr-usrp and
gnuradio-examples.  For fft and scope sinks you'll want gr-wxgui.


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