Cory Papenfuss wrote: >> I have a digital-wip branche which is work in progress for digital QAM >> stuff >> and >> general-wip which is my work in progress for general gnuradio things >> (latest addition is gr-cxadc, a driver for cx2388x capture cards to >> use as a general purpose high-speed ADC frontend as a cheap >> alternative for >> an USRP) >> >> Greetings, >> Martin >> > Has there been some progress on that front then? I've been lurking > here for awhile, but last time I looked into this I don't think the TV > -capture cards were viable. The BT8xx chips still have holes in the > data, right? CX2388x can stream baseband without VBI holes? Yes they can.
Look in the mailinglist for TV card SDR: http://lists.gnu.org/archive/html/discuss-gnuradio/2007-04/msg00134.html http://lists.gnu.org/archive/html/discuss-gnuradio/2007-04/msg00042.html How Chee page on this: http://www.geocities.com/how_chee/cx23881fc6.htm My page on this: http://www.olifantasia.com/projects/gnuradio/mdvh/cx2388x/cxadc/ SVN files are in http://gnuradio.org/trac/browser/gnuradio/branches/developers/nldudok1/general-wip cxadc is the kernel driver gr-cxadc is the gnuradio driver/glue gnuradio-examples/cxadc are the example scripts In short: We can capture without gaps from the video-input. There is a gr-cxadc gnuradio glue driver so you can use it right from gnuradio scripts as input (just like usrp) Tuning any tuner on the TV-card is not implemented in the gr-adc glue yet, I am working on that. (If you want to use the tuner you also have to connect an IF-output of the tuner to the video-input.) How Chee has used the 10.7 Mhz 200 kHz wide if-output of his card. I am working on the pcHDTV3000 card which has a 8 MHz wide IF output at 44 Mhz. I am currently working on enabling tuning for any tuner which is on the tv-card. The goal is that the code will support any tuner out-there so you could even replace a tuner without if to a tuner with if-output. I have been using the code with an external tuner frontend and did some experiments with fm-receiving, which just works fine. Greetings, Martin > > Thanks, > -Cory > > -- > > ************************************************************************* > * Cory Papenfuss, Ph.D., PPSEL-IA * > * Electrical Engineering * > * Virginia Polytechnic Institute and State University * > ************************************************************************* > > > > _______________________________________________ > Discuss-gnuradio mailing list > [EMAIL PROTECTED] > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio > _______________________________________________ Discuss-gnuradio mailing list [EMAIL PROTECTED] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
