Tait P25 CG, Инструкция по установке и эксплуатации

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TB9100/P25 CG Installation and Operation Manual Description 13
© Tait Electronics Limited January 2007
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 TB9100 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 50 W PA is installed in position 3 of the subrack. The
second 5W or 50 W PA is installed in position 5. The 100 W PA shares a
connection with the PMU to position 6 of the subrack. PAs are not required
in a P25 Console Gateway or receive-only base station.
Power Management Unit
The PMU provides the 28VDC
power supply for the modules in the
TB9100. The input voltage can be
AC, DC or both AC and DC,
depending on the model. An auxiliary
DC output is also available when the
optional power supply board is fitted.
This board is available with an output
of 13.65VDC, 27.3VDC, or
54.6VDC.
The PMU can only be installed in
position 6 of the subrack.
5/50W PA 100W PA
AC and DC PMU shown