> > The bandwidth of the I/Q pair is too large to be transmitted > > over USB for the reception of TV signals. After demodulation > > the bandwidth is lower so it would (marginally) fit an USB > > interface if we talk about traditional analogue TV. For digital > > TV the bandwidth reduction by the decoder is much larger.
Is that correct? From what I can find, an analogue TV signal has a bandwidth of around 6-8MHz. The HackRF is an SDR that works over USB2.0 and can capture a chunk of RF spectrum up to 20MHz, which should be ample for one analogue (or even digital) TV signal, perhaps even two if the channels are close enough together. > How much is actually needed? You know there's USB 3 these days, > which can transmit about a megabit with some change (due to > overhead). A megabit? :-) USB3.0 has a signalling rate of 5Gbps and according to Wikipedia, a usable data rate of up to 4Gbps. If you can fit 20MHz of RF over USB2.0 at 480Mbps, you should be able to start approaching 200MHz of bandwidth with a USB3.0 SDR! Cheers, Adam.
