User's Manual

19
Installing the booster antenna
Estimating cable requirements
Once you have selected the installation site, you must decide where you want the
cable to enter the house and approximately how much cable you are going to
need.
The following diagram shows an example of an installation.
INSERT DIAGRAM - Shows the booster antenna mounted on a rooftop, a
cutaway view of a house and a grounding block. The coax cable goes from the
booster antenna to the grounding block and then the SOMAport. The grounding
wire goes from the grounding block to the central building ground.
Considerations
You must use RG-6/U coaxial cable from the booster antenna to the
SOMAport. The total length of the coaxial cable from the booster antenna to the
SOMAport must not exceed 25 m (82 feet). You cannot use a line amplifier.
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To estimate how much cable is required
1
Identify where the SOMAport is located.
2
Locate the central building ground.
The following ground points are acceptable:
 Grounded interior metal cold water pipe within five feet of the point where it
enters the building
 Grounded metallic service raceway
 Grounded electrical service equipment enclosure
 A 2.5-m (8-foot) grounding rod driven into the ground (only if bonded to the
central building ground by #6 or heavier bonding wire)
 Other acceptable grounding electrodes that comply with sections 250 and 810
of the NEC, Section 10 of the CEC, or the electrical code of the country in
which you are installing the antenna.
WARNING:
Do not connect any third-party devices to the booster antenna,
booster antenna cable, or SOMAport F jack. Damage may occur.