Digital Equipment ChannelWorks, Руководство по установке сети

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1-2 ChannelWorks Network Installer’s Guide
Required Tools And Materials
• A 7/16-in open end wrench for attaching the cable TV cable to the unit.
• If you are going to be verifying the units’ installation parameters, a PC running
Windows 3.1, a terminal emulator, and a nine-pin null-modem cable to connect the
PC’s serial port with the bridge’s serial port
• For single-cable, cable TV networks, a subsplit, midsplit or highsplit diplex filter
(separately orderable item), if one is not already installed at the site; you will also
need short (18-in) attachment cables (RG6) (separately orderable) for the receive
and transmit ports of the diplex filters.
• Network connection cables (both cable TV and Ethernet networks).
• If the unit is being rack-mounted or wall-mounted, the Channelworks Bridge Rack
Mount or Wall Mount Kits (separately orderable), and the required mounting hard-
ware (listed with the mounting instructions).
How To Tell If The Cable TV Network Is Ready
Before beginning installation of the unit, verify that the cable TV system meets the fol-
lowing criteria, and is ready to accept the unit. Check with the cable installer or cable
system owner if necessary:
• The system must be two-way active, and must be capable of carrying signals from
the unit inbound to the headend, as well as out-bound from the headend to the unit.
• The signal path must meet conditions as specified in the ChannelWorks Cable TV
Installer’s Guide and documented for your specific installation site in the Pre-
Installation Checklist. A sample Pre-Installation Checklist is provided in the
Appendix B.
• On single-cable systems, there must be a translator installed at the headend, oper-
ating at the correct transmit and receive frequencies.
Before installing the unit, verify that the transmit and receive frequencies that have
been assigned to the unit are correct. If the unit is set to the wrong frequencies, it will
not operate on the network, and could also disrupt other users of the cable TV system.