Epson Ensemble HD 720 Installation Guide - Page 70

If you hear audio hum or buzz as a result of grounding the antenna

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Using an Outdoor FM Antenna A 75-ohm outdoor FM antenna may be used to improve reception. Disconnect the indoor antenna before replacing it with the outdoor one. 1 Connect the antenna's coaxial lead to the FM connector on the back of the AV controller. 2 Ground the antenna system as shown to provide protection against voltage surges and built-up static charges. Note Article 810 of the National Electrical Code, ANSI/NFPA 70, provides information with regard to proper grounding of the mast and supporting structure, grounding of the lead-in wire to an antenna discharge unit, size of grounding conductors, location of antenna-discharge unit, connection to grounding electrodes, and requirements for the grounding electrode. GROUND CLAMP ANTENNA LEAD IN WIRE ANTENNA DISCHARGE UNIT (NEC SECTION 810-20) ELECTRIC SERVICE EQUIPMENT GROUNDING CONDUCTORS (NEC SECTION 810-21) GROUND CLAMPS POWER SERVICE GROUNDING ELECTRODE SYSTEM (NEC ART 250, PART H) 3 If you hear audio hum or buzz as a result of grounding the antenna, connect a ground loop isolator to the antenna cable close to where it connects to the AV controller. This filters out interference caused by the outdoor ground connection. Or you can use a coaxial surge protector instead. Warning Never disconnect the antenna's ground connection or disable the grounding pins on your power cords. These exist for the protection of both you and your equipment. 70

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70
Using an Outdoor FM Antenna
A 75-ohm outdoor FM antenna may be used to improve reception. Disconnect the indoor antenna before
replacing it with the outdoor one.
1
Connect the antenna’s coaxial lead to the FM connector on the back of the AVcontroller.
2
Ground the antenna system as shown to provide protection against voltage surges and built-up static
charges.
Note
Article 810 of the National Electrical Code, ANSI/NFPA 70, provides information with regard to proper grounding of
the mast and supporting structure, grounding of the lead-in wire to an antenna discharge unit, size of grounding
conductors, location of antenna-discharge unit, connection to grounding electrodes, and requirements for the
grounding electrode.
3
If you hear audio hum or buzz as a result of grounding the antenna, connect a ground loop isolator to the
antenna cable close to where it connects to the AV controller. This filters out interference caused by the
outdoor ground connection. Or you can use a coaxial surge protector instead.
Warning
Never disconnect the antenna’s ground connection or disable the grounding pins on your power cords. These exist
for the protection of both you and your equipment.
ANTENNA
LEAD IN
WIRE
GROUND
CLAMP
ELECTRIC
SERVICE
EQUIPMENT
ANTENNA
DISCHARGE UNIT
(NEC SECTION 810-20)
GROUNDING CONDUCTORS
(NEC SECTION 810-21)
POWER SERVICE GROUNDING
ELECTRODE SYSTEM
(NEC ART 250, PART H)
GROUND CLAMPS