Quote:
Originally Posted by Broadbandings
The cable side of the CMTS / uBR outputs analogue signals, these are combined with the analogue outputs from the TV multiplexers and used to modulate the downstream laser.
Digital information is encoded in analogue signals using QAM these outputs are then used to modulate the downstream laser's output.
Lasers don't just have to be on or off . |
Not being clued up on the insides of VM cable, I was surprised to see the word "analogue" there. Now, you're rarely wrong at this level of discussion. So any further knowledge tap from you would be appreciated.
Since analogue bandwidth is several times larger than digital channels and I'm told that RG (where I'm served by VM) is a digital solution, I would have expected to see digital bit streams (especially because of HDTV) modulated by QAM.
So what's this analogue stuff?