Re: [Discuss-gnuradio] WBX Low Frequency Limit

On 10/30/2010 04:47 PM, Eric Cottrell wrote:
> Hello,
>
> I just got my WBX board and it works great in my USRP2. If it has 30 MHz BW then I can try foolish stuff like decoding all VHF ACARS frequencies with parallel decoders.
>
> When I do a USRP2 Probe the minimum Frequency is higher than advertised.
>
> Freq Range (min, max):
> 68750000.0 Hz
> 2200000000.0 Hz
>

Thats the limitations on the daughter-board LO. In combination with the
FPGA DSP, the overall chain you can tune you down to 68.75MHz - BW/2 +
host_rate/2, where BW is 40MHz:
http://www.ettus.com/uhd_docs/manual/html/dboards.html#wbx-series

You can tune lower depending upon how much of your baseband spectrum
that you are willing to tolerate outside of the passband of the WBX.

-Josh

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