[Discuss-gnuradio] Using a TV tuner as a high speed ADC

[ikjtel]

FWIW

Analog to Digital Converter with 16 bits and 448000 Samples
per second based in the Bt878A
http://hackaday.com/2005/11/08/using-a-tv-tuner-as-a-high-speed-adc/
 ---which takes you to
http://www.domenech.org/bt878a-adc/index-e.htm

 ---Also see
btaudio.c module modification to get 896000 Samples
per second with the Bt878A ADC
http://www.domenech.org/bt878a-adc/index-decimator-e.htm

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My added comments:  The above is a cool hardware hack that claims to take care 
of the baseband problem only- but I find it intriguing to wonder if it would be 
possible also to do two more ambitious things-
1) Using its TV tuner module (under software control of course), down-convert a 
swath of its output spectrum (prior to any detection) into the band covered by 
the extended range of the ADC
2) All of the above is based on the audio ADC.  If some way could be found to 
hack into the video one also, MHz bandwidths could become theoretically 
possible...

Best Regards

Max