10.30.2003 12:00 AM
Scientific-Atlanta Expands HD Head-End Offerings
The delivery of HD signals over cable TV systems just picked up a bit more steam with Scientific-Atlanta's announcement that it has two new HD demodulators targeted for cable applications. Since over-the-air broadcasts use 8VSB modulation for DTV and cable systems generally use 256QAM, cable head-ends require demodulators to provide the baseband ASI signal (19.4 Mbps), which is then remodulated as a 256QAM channel. Using this technology, cable systems can pack two HDTV channels onto a single 6 MHz cable channel.

The two new products are the D6238 demodulator and the more complex D6239 demodulator/multiplexer, with the latter containing the additional components necessary to stack two 256QAM channels onto a single cable channel. Both can receive an over-the-air broadcast from any local DTV broadcaster.

For more information, go to Scientific-Atlanta's Web site, http://www.scientific-atlanta.com/


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Thursday 10:05 AM
NAB Requests Expedited Review of Spectrum Auction Lawsuit
“Broadcasters assigned to new channels following the auction could be forced to accept reductions in their coverage area and population served, with no practical remedy.” ~NAB


 
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