On 05/24/2011 01:26 AM, Eddie Sun wrote:
Hi list,
I have a USRP N210, running on Ubuntu-10.04, when I try to use the
Gnuradio-Companion to make a fm_receiver,
I success generate the python code, but when i try to run it,
it shows
-----------------------------------------------------------------------------------
terminate called after throwing an instance of 'std::invalid_argument'
what(): gr_buffer_add_reader: nzero_preload must be >= 0
-----------------------------------------------------------------------------------
what is that mean?
Not sure, would have to see your GRC flow-graph.
PS I would like to ask an additional question: If I only have DBSRX
RFX1200 RFX1800 these three daughterboards, is that means I can't
receive the 100MHz FM Radio Signal by my fm_receiver through the USRP
N210 (bandwidth not right)? or there is some other ways ?
thanks,
The DBSRX covers about 800MHz to 2.3GHz, the RFX1200 covers 1.15GHz to
1.45GHz, the RFX1800
covers from 1.5GHz to 2.05GHz. I don't see 100MHz anywhere in there.
If you want good coverage of the FM radio band (88MHz to 108MHz in
North America), you would
need a TV_RX2 card or WBX card.
--
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org
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