alternative to funcubedongle?

Pepijn van den Berkhof vandenberkhof.pepijn at gmail.com
Sun Aug 14 13:04:16 UTC 2011


Hi all,

I own one of these. The I/Q bandwidth is 48kHz. But for now I can't get it to work with the script. Should it be possible to use the same script as the FCD but with -r 48000 specified? Because then I get an error like this:

Traceback (most recent call last):
  File "./src/demod/python/fcdp-tetra_demod.py", line 83, in <module>
    tb = my_top_block(options)
  File "./src/demod/python/fcdp-tetra_demod.py", line 36, in __init__
    channel_taps = gr.firdes.low_pass(1.0, sample_rate, options.low_pass, options.low_pass * 0.1, gr.firdes.WIN_HANN)
  File "/usr/lib/python2.7/dist-packages/gnuradio/gr/gnuradio_swig_py_general.py", line 2715, in low_pass
    return _gnuradio_swig_py_general.firdes_low_pass(*args, **kwargs)
IndexError: gr_firdes check failed: 0 < fa <= sampling_freq / 2

Am I doing something wrong?

Besides this the Alinco is a great scanner!

Cheers,

Pepijn
Op 30 jul 2011, om 17:56 heeft Harald Welte het volgende geschreven:

> Hi!
> 
> On Sat, Jul 30, 2011 at 02:16:02AM +0200, Mccauley wrote:
> 
>> Maybe even works better than FCD given a lot of people is reporting
>> that the dongle is sensitive to overloadis sensitive to overload.
>> 
>> It's a traditional radio-scanner receiver that provide a built in  I/Q
>> output for use with SDR software.
>> 
>> http://www.thiecom.de/alinco-dj-x11.html
>> 
>> http://www.hamradioscience.com/2011/06/alinco-dj-x11t-review/
>> 
>> Given I/Q connected to sound card, ¿would this work directly with
>> fcdp-tetra_demod.py?
> 
> I couldn't find any mention of the channel bandwidth for the I/Q mode of
> that scanner.  If it's at least the bandwidth of the tetra signal
> (25kHz), and if it doesn't have too much phase noise, it should work.
> 
> -- 
> - Harald Welte <laforge at gnumonks.org>           http://laforge.gnumonks.org/
> ============================================================================
> "Privacy in residential applications is a desirable marketing option."
>                                                  (ETSI EN 300 175-7 Ch. A6)
> 





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