C-2 Glossary Glossary of Terms
C-14 PN: 10580-00252 Rev. K Site Master User Guide
TMA : A Tower Mounted Amplifier (TMA) amplifies signals from an antenna
to reduce the signal to noise ratio of a base transceiver station (BTS).
This helps to improve the overall sensitivity of the BTS. A TMA is a
low-noise amplifier (LNA) that is usually mounted as close as practical
to the antenna in Base Transceiver Stations or in mobile masts. When
using a TMA, the antenna is able to receive weaker signals.
VBW : Video Bandwidth (VBW)
VSWR : Voltage Standing Wave Ratio (VSWR). VSWR is another method to
measure reflected energy caused by impedance mismatch. It is
expressed as a ratio of X:1. VSWR measures the voltage peaks and
valleys. A ratio of 1:1 would be a perfect match. A typical cable and
antenna system would be around 1.43:1 (VSWR) or 15 dB Return Loss.
Watt : Watt (W) is a unit of measure for power.
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