A Tower Mounted Amplifier (TMA) can be used to amplify the received signal. There are different types of TMA depending upon 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.
