Operations Manual, HPA2, Compact Outdoor SSPA
208495 REV B
19
2.6 Airflow
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 2-4
. 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: 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 remove
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.
2.7 Unit Weights
The Compact Outdoor SSPA is available in a variety of frequency bands and power levels,
and have a multitude of options which makes each unit weigh slightly different from another.
The following chart,
Table 2-7
, outlines the weights for the most common power levels of
Compact Outdoor SSPA and additional weight add-ons for common options.
Figure 2-5: Improper mounting
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