CCI’s Dual Band TMA (AWS/PCS), includes AWS-3 and 600/700/850 bypass is available in a single or twin configuration. Each TMA is fully duplexed and shares a single LNA for both bands. The bypass path provides excellent isolation to the TMA path. Separate antenna ports for the bypass and TMA paths are combined onto a single BTS port. The TMA's low noise, highly linear amplifiers improve the uplink sensitivity and the receive performance of the base station. The TMA is configurable to operate using either CWA or AISG 2.0 communication protocols. The TMA supports CDMA, EDGE/GSM, UMTS and LTE BTS equipment. The unit is ideally suited for sites upgraded to dual-band using the existing infrastructure. The TMA allows the sharing of feeder lines for all bands thus reducing tower loading, leasing, and installation costs. Input and output connectors are located inline for ease of installation in space constrained areas such as uni-pole structures and stealth antennas.

The TMA system is an outdoor dual band tower mount unit which provides low noise amplification of PCS and AWS uplink signals combined with 600/700/850 bypassed signals from separate antenna ports to a common BTS port. Each unit consists of multiple band-pass filters, one low noise amplifier (LNA) with bypass failure circuitry, one bias tee, AISG control circuitry, and lightning protection circuitry all housed in an IP67 enclosure suited to long life masthead mounting. The AWS and PCS paths are dual duplexed to separate the low power uplink signals from the high power down link signals at the BTS and antenna ports. The AWS and PCS uplink signals are amplified with a dedicated ultra-low noise PHEMT LNA with adjustable gain control. The unit provides protection against lightning strikes via a multistage surge protection circuit. DC power and AISG 2.0 control are provided via the BTS feeder cable. The unit is capable of switching between AISG and CWA modes as follows. On power up, the unit restores the previous mode at power down. The unit will switch from AISG to CWA mode by applying DC to both BTS ports. The unit will switch from CWA to AISG mode when it detects an AISG message on either BTS port. The unit can also be locked to a specific mode by entering keywords in specific device data fields as outlined. In CWA mode, the unit requires 12VDC at each BTS port and follows typical current window convention (see specifications in "General Characteristics"). In AISG mode, the unit will accept 10-30 VDC from either BTS port. In AISG mode, the unit does not require an AISG 2.0 compatible site control unit (SCU) and may also be powered by a standard power distribution unit (PDU). This TMA can be configured with either 7-16 or 4.3-10 connectors and also has the option of providing DC/AISG pass through to the antenna.
An optional Site Control Unit (SCU) is available to power up to 32 AISG modules per sector and to provide the monitoring and alarm functions for the system. The SCU is housed in a single (1U) 1.75” x 19” rack and contains dual redundant power supplies capable of being “hot swapped” that provide a regulated DC supply voltage on the RF coax for the tower mount amplifiers.