Lightning Protection; Docsis; Table 1: Cable Modem Receiver Characteristics - Belair 100SN Installation Manual

BelAir100SN Installation Guide
Lightning
Protection

DOCSIS

Table 1: Cable Modem Receiver Characteristics

Characteristic DOCSIS 2.0
Demodulation 64/256 QAM
May 18, 2010
Professional installers with appropriate credentials and experience are
responsible for installing coaxial cable terminator or the KS to F-type adapter
onto the cable power supply using industry and corporate standard procedures.
BelAir units are not designed to survive a direct lightning hit. However, they are
intended to withstand the voltage and current surges induced from nearby
lightning activity.
The BelAir100SN is designed to sustain multiple 6 kV/3 kA lightning surges
without damage or loss of operation. The BelAir100SN does not require
lightning protection except when an external antenna is installed more than
3 feet (approx. 1 m) from the unit.
In this case, you must use lightning arrestors to protect the external antennas
ports. When lightning arrestors are used, they should be located within 3 feet
(approx. 1 m) of the BelAir100SN unit and must be grounded to both the unit
and protective earth ground. The N-type connector may be used to complete
the ground connection.
BelAir100SN units contain an embedded Hitron DOCSIS 3.0 cable modem,
model number BRG-35502, providing connectivity to a host network, such as
the Internet.
The cable modem is accessed directly through the GRS connector that is used
for both power input and as a DOCSIS RF interface. The cable modem is fully
DOCSIS 3.0 compliant and designed for use with 75 ohm cables.
The standard input range of a cable modem is -15 dBmV to +15 dBmV for
DOCSIS 3 and 17 dBmV for DOCSIS 3. The BelAir100SN implements
independent 0 to 20 dB digital attenuators in both upstream and downstream
paths.
Cable Modem Receiver Specifications
Table 1 shows the cable modem receiver characteristics.
Confidential
Document Number BDTK11001-A01 Preliminary
Infrastructure Requirements for the BelAir100SN
DOCSIS 3.0
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