Cable Modem Technology
Typically, a cable modem sends and receives data in two slightly different fashions
- In the downstream direction
- he digital data is modulated and then placed on a typical 6 MHz television channel, somewhere between 50 MHz and 750 MHz
- 64 QAM is the preferred downstream modulation technique, offering up to 27 Mbps per 6 MHz channel
- This signal can be placed in a 6 MHz channel adjacent to TV signals on either side without disturbing the cable television video signals.