User's Manual

Quantum 1000 Base Station User
Referring to figure 41
above, the “Height Above Antenna” above the highest item of equipment (generally
the antenna) must be at least twice the distance (2 x d) between the outer surfa
tower. This will ensure a “protection cone” of 60 degrees around the tower (30 degrees each side from
the lightning rod). In areas of high lightning activity, the “Height Above Antenna” should be increased to
up 5 times the distance.
3.3 Down Conductor
The purpose of the Down conductor is to provide the shortest and most direct path to the earth.
grounding of the down conductor to earth must be of ground resistance no more than 5 ohms.
3.4 Co-
axial and/or Cat 5 Cable Shield Grounding
The purpose of the Shield grounding is to minimize the potentials induced on circuit conductors plus keep
the cable shields at earth potential (0V) for personnel safety.
All ground lugs must be properly bonded to the grounding system of the protected comp
all Antenna cables. Prior to entry into any facility, the cables must be properly grounded to the building
primary ground system at the building entrance panel.
In case of an indoor installed Base Station then this will apply to the co
Station to the Antenna. This is because these co
the indoor and the outdoor.
In the case of an outdoor installed Base Station, then this will apply to the Cat 5 cab
connection to the Base Station. In the case of an installation of the Base Station, it is the Cat 5 cable and
the power that provide the inter-
connections between the indoor and the outdoor.
3.5
Grounding and Bonding
The National Electric Code r
equires that any accessible metallic surface of electronic equipment be
connected to earth ground for personnel safety. Earth ground connections are achieved by direct
connections to the AC power ground at the IDU and by a grounding lug on the ODU. A Craft
attach a proper size wire to the ODU ground lug during installation, else the ODU chassis will float at
whatever potential appears at the shield connection of the coax.
3.6
Recommended Connection of a Bonded Ground
We will now examine the conce
pt of a bonded ground. Bonded connections for reliable, gas tight joints
between conductors require removal of all paint from both contact surfaces and holding them together
under high pressure such as with a bolt or screw. The use of toothed washers is al
cause the conductive surfaces to bite into each other for improved connectivity and eliminate movement
of the conductors due to vibration.
Quantum 1000 Base Station User
Guide
Rev 1.1, Page
above, the “Height Above Antenna” above the highest item of equipment (generally
the antenna) must be at least twice the distance (2 x d) between the outer surfa
ce of the item and the
tower. This will ensure a “protection cone” of 60 degrees around the tower (30 degrees each side from
the lightning rod). In areas of high lightning activity, the “Height Above Antenna” should be increased to
The purpose of the Down conductor is to provide the shortest and most direct path to the earth.
grounding of the down conductor to earth must be of ground resistance no more than 5 ohms.
axial and/or Cat 5 Cable Shield Grounding
The purpose of the Shield grounding is to minimize the potentials induced on circuit conductors plus keep
the cable shields at earth potential (0V) for personnel safety.
All ground lugs must be properly bonded to the grounding system of the protected comp
all Antenna cables. Prior to entry into any facility, the cables must be properly grounded to the building
primary ground system at the building entrance panel.
In case of an indoor installed Base Station then this will apply to the co
-
axial cables that connect the Base
Station to the Antenna. This is because these co
-axial cables provide the only inter-
connection between
In the case of an outdoor installed Base Station, then this will apply to the Cat 5 cab
le and power
connection to the Base Station. In the case of an installation of the Base Station, it is the Cat 5 cable and
connections between the indoor and the outdoor.
Grounding and Bonding
equires that any accessible metallic surface of electronic equipment be
connected to earth ground for personnel safety. Earth ground connections are achieved by direct
connections to the AC power ground at the IDU and by a grounding lug on the ODU. A Craft
attach a proper size wire to the ODU ground lug during installation, else the ODU chassis will float at
whatever potential appears at the shield connection of the coax.
Recommended Connection of a Bonded Ground
pt of a bonded ground. Bonded connections for reliable, gas tight joints
between conductors require removal of all paint from both contact surfaces and holding them together
under high pressure such as with a bolt or screw. The use of toothed washers is al
so recommended to
cause the conductive surfaces to bite into each other for improved connectivity and eliminate movement
Rev 1.1, Page
40 of 70
above, the “Height Above Antenna” above the highest item of equipment (generally
ce of the item and the
tower. This will ensure a “protection cone” of 60 degrees around the tower (30 degrees each side from
the lightning rod). In areas of high lightning activity, the “Height Above Antenna” should be increased to
The purpose of the Down conductor is to provide the shortest and most direct path to the earth.
The
grounding of the down conductor to earth must be of ground resistance no more than 5 ohms.
The purpose of the Shield grounding is to minimize the potentials induced on circuit conductors plus keep
All ground lugs must be properly bonded to the grounding system of the protected comp
onents along with
all Antenna cables. Prior to entry into any facility, the cables must be properly grounded to the building
axial cables that connect the Base
connection between
le and power
connection to the Base Station. In the case of an installation of the Base Station, it is the Cat 5 cable and
equires that any accessible metallic surface of electronic equipment be
connected to earth ground for personnel safety. Earth ground connections are achieved by direct
connections to the AC power ground at the IDU and by a grounding lug on the ODU. A Craft
sperson must
attach a proper size wire to the ODU ground lug during installation, else the ODU chassis will float at
pt of a bonded ground. Bonded connections for reliable, gas tight joints
between conductors require removal of all paint from both contact surfaces and holding them together
so recommended to
cause the conductive surfaces to bite into each other for improved connectivity and eliminate movement