Cisco Cisco D9865 Satellite Receiver インストールガイド

grounding of the lead-in wire to an antenna discharge unit, connection to grounding electrodes, and 
requirements for the grounding electrode (see Satellite Receiver and Satellite Antenna Satellite 
Antenna.

Before you can operate your satellite receiver system, both the satellite receiver chassis and the satellite 
antenna LNB connection(s) must be properly grounded. For information about grounding your satellite 
receiver, also referred to as “receiver”, and satellite antenna follow:

Grounding the receiver: The receiver ground connection is made from the shield (multi-strand braided 
shield surrounding the center conductor of the coaxial cable) conductor attached to the RF coaxial cable 
“F” connector (rear panel RF IN input) to an external grounding rod via a receiver/antenna grounding 
block. A separate grounding wire connects the grounding block (and the satellite antenna LNB 
grounding block) to the grounding rod. 

Grounding the LNB and/or VHF/UHF antenna: The antenna ground connection is made from the 
satellite LNB/antenna ground and/or the VHF/UHF terrestrial antenna discharge unit to an external 
grounding rod via a receiver/antenna grounding block.

General grounding information: The actual ground/cable connections made depend on your site 
installation requirements, and on the type of satellite antenna and/or VHF/UHF terrestrial antenna you 
have. If your satellite antenna installation includes a dual-port LNB, both RF coaxial cables must be 
routed to the grounding block. When connecting RF coaxial antenna cables to the grounding block, 
looping the antenna cables as shown in the accompanying figure helps to direct moisture away from the 
grounding block. Always choose the shortest route possible when connecting RF coaxial cables to the 
receiver/antenna grounding block and when connecting the grounding wire(s) to the grounding rod.

Each ground connection must be made using a single (continuous) piece of wire. Never splice two wires 
together when making a ground connection. Corrosion and weathering can cause a poor electrical 
connection at the splice which can lead to an ineffective and dangerous ground condition.