S412E UG PN: 10580-00318 Rev. P C-1
Appendix C — Tower Mounted
Amplifiers
C-1 Introduction
A Tower Mounted Amplifier (TMA) can be used to amplify the received signal. There are
different types of TMA depending on the system requirements. Three commonly used types
are:
• TMA-D: A duplex tower mounted amplifier that combines transmit and receive ports
from the radio system and connects to a single antenna. This configuration is specific to
systems that use a single antenna configuration.
• TMA-S: A receive-only tower mounted amplifier is installed between the receiving
antenna and the radio to boost weak signals. This configuration is common on systems
that implement separate antennas for transmitting and receiving.
• TMA-DD: A dual-duplex tower mounted amplifier used for radios systems with a single
transmission line connection for transmit and receive. These systems are commonly
called transceivers.
Figure C-1. Tower Mounted Amplifiers
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