> 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.