User's Manual

V H F A M P L I F I E R T E C H N I C A L M A N U A L
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with suitable connectors.
5) Connect to AC power source. Press and hold (5 seconds) the button on the UPS unit
inside the Amplifier box to tune the unit on. The green light will be lit; if AC voltage
is not present the amber light and a beeping alarm will be on, showing the unit is in
temporary battery back up.
6) After the unit is on: reference the OLC with a multi-meter to identify if the OLC is
activated. It should no be active unless there is a strong portable using the system or
the antennas are not spaced properly (donor to Distribution. Refer to Data sheet for
voltage readings.
7) Installation is now complete, Optimize unit to the specific Distribution system
environment.
Antenna Installation
Buildings that are not designed or upgraded for antenna systems need special attention for
antenna mountings, equipment installation and Cable runs. There are many variables involved
in the design of a DAS system (distributed antenna system).
-Structural requirements for the location of the outdoor antenna (Donor); masts towers,
building structure for the wind and ice loading.
-Protection of antennas and cables from building occupants and general human interaction.
- Installers/designers must be aware of general seating, foot traffic areas and different access
points.
- All Antennas must be 66cm (26 Inches) or greater to meet exposure requirements.
-The Donor antenna and distribution antennas must be have 20 dB + the Maximum gain of
the amplifier of isolation between them. Less Isolation will cause the amplifier to overload and
oscillation will occur which may result in damage to the Amplifier.
- Antennas should be mounted following the manufactures guild lines for RF connection and
being affixed to the building or location of desired signal.
- All cables used in the DAS system shall be 50 ohms and clamped properly to insure the cables
50 ohm impedance characteristics. Improper clamps will change the impedance of the cable at
that location thus changing the efficiency of the system.
- Antenna placement through the DAS system is important to impose a balanced distributed
signal. The use of proper valued (dB) decouples, power dividers, and signal taps is important to
promote a balanced system.