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Technology Stocks : Terayon Communications Systems
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To: Shawn Fisher who wrote (27)8/3/1998 9:45:00 PM
From: Bernard Levy  Read Replies (1) of 48
 
Shawn:

a) S-CDMA certainly allows operators to run
their plant less cleanly than other modulation
schemes. In fact, it is the only scheme that
works on pure coax networks. For HFC networks,
multicarrier modulation may be slightly better,
but S-CDMa is not far behind, and is ahead
of conventional upstream QAM modulation schemes.
Some QAM schemes are advertised as ''frequency
agile,'' which probably means they adapt to
noise disturbances in the channel.

b The advantage of HFC networks and cleaner
plants is greater information carrying capacity.
This will allow a migration to digital
cable TV with 300 channels in the current
TV spectrum, as well as new services such as
video conferencing. Also, as the number of users
grows, increased capacity will become important.

Best regards,

Bernard Levy
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