Digital Equipment ChannelWorks DECTV-AA, Руководство по установке, Страница: 8 / 106

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Contents
2 Cable TV Network Overview
Introduction ................................................................................................................................. 2-1
Cable TV Network Topologies.................................................................................................... 2-1
Typical Metropolitan Area Network Over Cable TV........................................................... 2-1
Single Cable Plants ............................................................................................................... 2-3
Dual Cable Plants ................................................................................................................. 2-3
Topologies ............................................................................................................................ 2-3
3 Preparing The Cable TV Network
Introduction ................................................................................................................................. 3-1
Setting Up The Headend Translator ............................................................................................ 3-1
Verifying And Setting Up Test Equipment ................................................................................. 3-1
Setting The TransMaster’s Forward And Return Frequencies ............................................. 3-2
Forward (Output) Channel Frequency Selection........................................................... 3-2
Return (Input) Channel Frequency Selection ................................................................ 3-2
Verifying The TransMaster’s Output Signal Level .............................................................. 3-4
Adjusting The TransMaster Gain ......................................................................................... 3-4
Cable TV Cable Verification Tests.............................................................................................. 3-6
Verifying Selected Cable TV Drop’s Center Frequency Receive Level .............................. 3-7
Verifying The Flatness Of The Cable TV Network At The Selected Drop ......................... 3-8
Verifying The Cable TV Network’s Return Outlet To Outlet Variation............................ 3-10
4 Configuring And Installing The ChannelWorks Bridge
Introduction ................................................................................................................................. 4-1
Installing The LANcity Management Utility On A PC........................................................ 4-2
Setting Up User Accounts .................................................................................................... 4-4
User Levels ........................................................................................................................... 4-6
Level One ...................................................................................................................... 4-6
Level Two...................................................................................................................... 4-6
Level Three.................................................................................................................... 4-6
Level Four ..................................................................................................................... 4-6
Setting Up The ChannelWorks Bridge For Operation................................................................. 4-7
Verifying The ChannelWorks Bridge Parameters ................................................................ 4-9