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Operations Manual, HPA3, Mini Compact Outdoor SSPA
208143 REV C
19
2.3.2 Air Flow and Removable Fan Tray
The Mini Compact Outdoor Amplifier’s cooling system represents a landmark in microwave
telecommunication amplifiers. It is 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 24.5 lbs or 11.1 kg).
The cooling system is based on a forced convection technique in which the system fans
provide the air intake while the exhaust is brought out around the outer perimeter of the fans.
The fans are 132 CFM rated and operate into approximately 0.3 in. H
2
O back pressure, and
produce 68.0 dB-A measured at a distance of 1 meter from the fan intake.
The air intake and exhaust are both located on the bottom side of the amplifier. The intake is
brought through two fans while the exhaust is along the two rows of heatsink fins as seen in
Figure 2-2
.
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.
Warning! The Mini Compact Outdoor SSPA should NEVER be mounted
with the fans facing up. Doing so will void your warranty.
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 7: Troubleshooting and Maintenance
for cleaning instructions.
RF OUT
J2
Figure 2-2: Mini Compact Outdoor SSPA Air Flow
Содержание Mini Compact Outdoor
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