Tait TB9100, Installation And Operation Manual

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TB9100 Installation and Operation Manual
Glossary141
© Tait Electronics Limited May 2006
RISC
Reduced instruction set chip. The name used for the control
processors in the reciter’s digital board and network board.
RS-232
A serial communications protocol.
RSSI
RSSI (Received Signal Strength Indicator) is a level that
indicates the strength of the received signal.
RTP
RTP (Real Time Protocol) is an Internet protocol that supports
the real-time transmission of voice and data.
Run mode
Run mode is the normal operating mode of the base station.
Rx
Receiver.
S
selective squelch
A type of squelch operation in which the receiver unmutes only
on signals that are explicitly addressed to that receiver. This can
be done through a talk group ID or unit ID (digital P25) or
through MDC1200 signaling (analog FM).
sensitivity
The sensitivity of a radio receiver is the minimum input signal
strength required to provide a useable signal.
signaling profile
A signaling profile is a named set of configuration items related
to signaling that can be applied to any channel. Items include
subaudible signaling and transmit timers.
simplex channel
group
The simplex channel group has a single voter at each channel
group member, which selects one stream from all the possible
sources, and sends it to all the output interfaces.
SINAD
SINAD (Signal plus Noise and Distortion) is a measure of signal
quality. It is the ratio of ( noise + distortion) to (noise +
distortion). A SINAD of 12 dB corresponds to a signal to noise
ratio of 4:1. The TB9100 can provide an approximate SINAD
value while in service by comparing the in-band audio against
out-of-band noise. This value should not be relied upon to make
calibrated measurements.