TB9100/P25 CG/P25 TAG Installation and Operation Manual Description 15
© Tait Limited March 2014
Power Amplifier
The power amplifier amplifies the RF output from the reciter and is available
in 5W, 50W and 100W models.
The 5W and 50W models mount vertically in the subrack, while the 100W
model mounts horizontally as it has a wider heatsink. The 100W PA is also
fitted with an airflow duct.
All three models are designed to operate on the 28VDC output provided by
the power management unit. In addition, variants of the 5W and 50W
models are available for DC-only operation. These two 12V PAs are fitted
with an internal boost regulator board, which converts the 12V nominal
DC input to a 28VDC output to power the PA circuit boards. The boost
regulator board also provides a 12VDC output to power the reciter.
The first 5W or 50W PA is installed in position 3 of the subrack. The second
5W or 50W PA is installed in position 5. The 100 W PA occupies positions
3, 4 and 5 and shares a connection with the PMU to position 6 of the
subrack. PAs are not required in a gateway or receive-only base station.
Power Management Unit
The PMU provides the 28VDC
power supply for the modules in the
subrack. The input voltage can be AC,
DC or both AC and DC, depending
on the model. The PMU also has an
auxiliary DC output of 13.65VDC,
27.3VDC, or 54.6VDC, depending
on the model.
The PMU can only be installed in
positions 6 and 7 of the subrack. It is
connected to position 6.
5/50W PA 100W PA
AC and DC PMU shown
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