System information

© 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential Presentation_ID Kirkpatrick 092509
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Cisco investigated all reverse
technologies listed.
Cisco selected the FM approach since
this was the only technology that cost-
effectively achieved the desired system
performance.
Cisco called FM return “Wideband”.
Technology Considerations
Achieve >15 dB upstream dynamic range with DOCSIS
3.0 loading
 Amplitude Modulation (AM)
– Existing HFC receivers have limited performance
– New low-noise AM technology produces 23dB link budget at best
– “Variable” link gain
 Digital
– Can achieve 28dB link budget
– “Fixed” link gain
– However, costly approach
 Frequency Modulation (FM)
– Can achieve 28dB link budget
– “Fixed” link gain
– Simple installation (plug & play)