A Tower-Top Amplifier (TTA) is an important system component in systems above 700 MHz. As the frequency rises, so does the loss of the coaxial cable feedline which connects the receive antenna to the system. A TTA places a high-performance Low-Noise Amplifier (LNA) as close to the receive antenna as practically possible to minimize feedline loss before amplification.
(3) The new compact high performance Tower-Top Amplifier (TTA) Systems consist of two components: the Tower-Top Amplifier mounted close to the antenna and the Receiver Multicoupler base unit.These systems are designed to increase the performance of a Base Transceiver Station (BTS) while ensuring reliable communications for mission critical communications.
(4) TX RX’s new generation of broadband receiver multicouplers provide unequalled
performance in a 1-rack unit (1 3/4 inch) space-saving package. The high
performance LNA's typically exhibit a noise figure of only 1 dB while providing a
(100% measured) 3rd order output intercept point in excess of 40 dBm. The
multicouplers are designed with a minimum excess gain of 10 dB which gives
maximum sensitivity in rural applications. All the units are designed for ease of
expansion, with no change in system gain in most cases. Combline preselectors are
available for all common applications in the 700/800/900 MHz bands.
(20) All TX RX Receiver Multicouplers are easily expandable by either adding additional
power dividers to the existing chassis or by addition of a 1-rack unit deck. The 16-
channel BNC models have 2 terminated BNC connectors for non-invasive expansion of
up to 16 additional outputs in 8-output blocks, with no change in performance or
specifications. All necessary cables with attached connectors are included in each kit.
(3) TX RX Systems Inc. continues to support its first generation of Receiver Multicoupler products with system expansion kits. These models employ single and dual stage preamplifiers with two and four channel power dividers in pyramid interconnection systems allowing us to support expansion from four to sixty-four channel capacity in four-channel increments.
