4035197 Rev C D9865 Satellite Receiver Installation and Operation Guide vii
Safety Precautions, Continued
19. Replacement Parts: When replacement parts are required, be sure the service
technician uses replacement parts specified by Cisco, or parts having the same
operating characteristics as the original parts. Unauthorized part substitutions
made may result in fire, electric shock or other hazards.
20. Safety Check: Upon completion of any service or repairs made to this product,
ask the service technician to perform safety checks to determine that the product
is in safe operating condition.
21. Outdoor Antenna Grounding: If an outside antenna or cable system is
connected to this product, ensure that the antenna or cable system is properly
grounded to provide protection against voltage surges and built-up static
charges. Appropriate sections of the National Electrical Code (NFPA 1990)
provide information with respect to proper grounding of the mast and
supporting structure, 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
Grounding).
Satellite Receiver & Satellite Antenna Grounding
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 shield1)
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.
1)Multi-strand (braided) shield surrounding the center conductor of the coaxial cable.