Paradise 205486 REV F - Manual (Page 21)

Operations Manual, HPA2, Compact Outdoor SSPA 208495 REV C 21
2.3 Physical Features
In addition to the I/O connectors, the Compact Outdoor user-friendly features include a sum-
mary alarm indicator and removable fan tray.
2.3.1 Summary Alarm Indicator
A summary alarm indicator LED is located on the input side of the amplifier. When the SSPA
is online, this indicator illuminates GREEN. When in a fault condition, it illuminates RED.
2.3.2 Airflow and Removable Fan Tray
The Compact Outdoor Amplifier’s cooling system represents a landmark in microwave tele-
communication amplifiers. It features a unique system of heatsinks that have been computer
optimized to provide extremely efficient cooling of all of the system’s functional blocks. This
high efficiency cooling system is primarily responsible for the small overall package size and
reduced weight of the unit (approximately 36 lbs or 16.4 kg).
The cooling system is based on a forced convection technique in which the system fans pro-
vide the air intake while the exhaust is brought out around the outer perimeter of the fans.
The air intake and exhaust are both located on the bottom side of the amplifier. The intake is
brought through three fans while the exhaust is along the two rows of heatsink fins as seen in
Figure 2-3.
A minimum clearance of 6 inches (152 mm) should be maintained between the bottom of the
amplifier and any mounting surface. This will ensure that there is no forced re-circulation of
airflow from exhaust to intake.
The Compact Outdoor SSPA should NEVER be mounted with the fans facing up.
The fans should be examined periodically and any obstruction or debris should be cleared.
Inadequate air flow can cause the amplifier to overheat and cause a temperature fault. See
Section 6: Troubleshooting and Maintenance for instructions on how to clean the fan
assembly and heatsink.
In system configurations, ensure that each unit in the system
has sufficient ambient airflow, and adequate space to maintain
the fans for each unit. Figure 2-5 shows an improper method
for mounting a Compact Outdoor SSPA system. Not only do
the fans oppose each other, thereby potentially causing thermal
issues, but the configuration leaves insufficient space to re-
move the fans to periodically clean the heatsink.
The fans provide a maximum air flow of 103 CFM each
(maximum air pressure of 0.691 inches H
2
O at zero air flow)
and produce 54.0 dB-A measured at a distance of 1 meter from
the fan intake.
Figure 2-5: Improper
mounting