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You'll need the following hardware, or something similar:

(HdTv also needed to be able to write 40 Mbytes/sec to hard drives, so see HowtoHdTv for the disk configuration used there. Most GnuRadio users won't be handling the same volume of data or computation, so won't need this.)

''The April 25 '03 issue of NTK ( mentions that EricBlossom previewed a "$300 USB 2.0 GnuRadio setup" at the recent Emerging Technology conference. Any details on this device? ''

-- Try the UniversalSoftwareRadioPeripheral, Currently (2004-01-01) working in prototype.

Untested idea: The BT878 chip used on some analog TV cards has an additional single channel 16 bit AD-converter for audio that can use a few fixed sample rates between 119 and 448kHz (no, I did not forget a decimal point). It can be used in Linux as an OSS device with the btaudio module (use analog=1 parameter) or the snd-bt87x module of ALSA 1.0rc2 or later (use subdevice 1).

Btaudio does work with gnuradio. I had to comment out the code that attempts to set the fragment size (btaudio does not currently support this) and the code that attemps to set the number of channels in VrAudioSource?.h and GrAudioSource?.h . After making the relevent changes in VrAudioSource?.h and I am able to use audio_scope to see a live spectrum display of the input (on a unmodified tv tuner card this is the baseband audio output from the tuner). The bt878 has three multiplexed audio inputs so the extras could be used for narrow to medium bandwidth radio signals (vlf with no downconverter or an IntermediateFrequency of up to 120KHz).

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Last edited April 16, 2004 11:30 (diff)