User's Manual

TB9300 Installation and Operation Manual Glossary 123
© Tait Limited June 2016
QoS
Quality Of Service. A router feature that gives real-time data such as voice
calls priority over other data.
reciter A module of a base station that provides both receiver and exciter
functionality as well as the interface to the network.
repeater talkaround Allows the MS to bypass repeater operation and so communicate directly
with other mobile stations. While repeater talkaround is active, all
transmissions are made on the receive frequency programmed for the
channel.
RISC Reduced Instruction Set Computer. A type of microprocessor that
recognizes a relatively limited number of instructions. The reciter’s control
board has a RISC microprocessor.
router A router is an internetwork packet switch that switches data packets from
an input interface to an output interface. The interfaces can be of different
types.
RS-232 A protocol for serial communications between a DTE (data terminal
equipment) and a DCE (data communications equipment) device.
RS-485 An updated version of the RS-232 protocol for serial communications
between multiple devices.
RSSI Received Signal Strength Indicator is a level that indicates the strength of
the received signal.
RTP Real Time Protocol is an Internet protocol that supports the real-time
transmission of voice and data.
Rx Receiver.
SAW filter Surface Acoustic Wave filter. A band pass filter that can be used to filter
both RF and IF frequencies. A SAW filter uses the piezoelectric effect to
turn the input signal into vibrations that are turned back into electrical
signals in the desired frequency range.
selectivity The ability of a radio receiver to select the wanted signal and reject
unwanted signals on adjacent channels (expressed as a ratio).
sensitivity The sensitivity of a radio receiver is the minimum input signal strength
required to provide a usable signal.