On 9 Apr 2006 17:47:03 -0700, "Mark" wrote:


clifto wrote:
wrote:
NTSC TV is a bandwidth hog. That is why the cable company is pushing
digital.

NTSC takes 6 MHz per channel. Digital takes 6 MHz per channel, more
if you want 1080p or higher resolution. They're pushing digital because
the set sellers want us to throw away all our existing televisions and
buy new ones.

--

analog NTSC takes 6 MHz for one analog program

digital cable TV is divided into 6 MHz channels but each 6 MHz channel
can carry 10 or more standard def programs or 2 high def programs on
cable..


The local CBS station (analog on channel 19) here has digital on 19.1,
and UPN on 19.2 (the digital is actually ch18, but they call it 19).

downstream cable modem signals are the same as digital cable TV signals


And upstream uses a smaller band, normally below the frequencies used
for channel 2.


Mark

--
Mark Lloyd
http://notstupid.laughingsquid.com

"Democracy is two wolves and a lamb voting on what
to have for lunch. Liberty is a well armed lamb
contesting the vote." - Benjamin Franklin