Ventilation Requirements
The repeater is equipped with a cooling fan to provide forced convection cooling. So please comply
with the ventilation requirements below in pre-installation.
Cabinets must be equipped with ventilation slots or openings in the front (for air entry) and back
or side panels (for air to exit). If several repeaters are installed in a single cabinet, be sure ventilation
openings surround each repeater to allow for adequate cooling.
All cabinets must have at least 15cm (6 inch) of open space between the air vents and any wall
or other cabinets to allow for adequate air flow.
When several cabinets (several repeaters in each cabinet) are installed in a closed area, adequate
ventilation must be ensured, also to be considered are air condition or other environmental control
devices, to meet the operating temperature requirements of the equipment.
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AC Input Power Requirements
The repeater is equipped with a switching-mode power supply of which the working range is
100 – 240VAC (47 – 63Hz AC input power). Besides, a standard 3-core cable is provided to connect
the power supply to AC power supply.
A grounding socket-outlet with standard 3-core cable is recommended to connect the AC power supply.
The socket-outlet must be connected to the AC power supply which can provide a maximum power
of 280W. For nominal 110/120 VAC input, the AC power supply must be with 5A current supply and
protected by a circuit breaker with 15A rated current. For nominal 220/240 VAC input, the AC power
supply must be with 3A current supply and protected by a circuit breaker with 10A rated current.
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Circuit Overloading
Overloading of the overcurrent protective device and effects of the power supply circuit must
be considered. To be considered is the rated value of equipment for solving such problem.
Mounting Methods
HQT repeater can be mounted in a rack, bracket or cabinet (So can the accessories).
Grounding and Lightning Protection
One of the most important issues to be considered is grounding and lightning protection system in
designing communication site. Correct grounding technology is closely related to lightning protection,
and the common types of site grounding are listed as below:
the dirt or dust in the internal PCB and module is difficult to clean, and may cause problems such
as superheating and discontinuously electrical connection etc.
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