The DTMA1819VG12x from Communications Components Inc is a Twin Tower Mount Amplifier (TMA) that operates from 1850 to 1995 MHz. It consists of two fully duplexed TMA’s in a single housing with independent AISG 2.0 compliant gain control. This TMA provides an adjustable gain of 12 dB in 0.25 dB steps and has an insertion loss of 1.6 dB. It consists of six bandpass filters, four redundant low noise amplifiers (LNAs), bypass failure circuitry, and a bias tee. It is dual duplexed to separate the low-power uplink signal from the high-power downlink signal at the antenna port, amplify the low-level uplink signal using an ultra-low noise amplifier, and recombine the two paths at the base station port.
The DTMA1819VG12x supports both LTE and UMTS as well as legacy CDMA and EDGE/GSM BTS equipment. It is available in a convenient package for sites upgraded to dual or quad antenna configurations. The twin TMA package reduces tower loading, leasing, and installation costs and is an excellent match for two branch receive diversity applications using dual polarization antennas. This TMA offers protection against lightning strikes via a multi-stage surge protection circuit. It has an option for indoor site control unit (SCU) to power up to 32 AISG modules per sector and provide all monitoring and alarm functions for the system.
The TMA requires a DC supply from 10 to 30 V and consumes less than 2.1 W of power. It is available in an IP-65-rated module that measures 10.63 x 7.87 x 2.9 inches with 4 7-16 DIN (female) connectors.
