300 Glossary TB8100 Service Manual
© Tait Electronics Limited September 2006
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operating range Operating range is another term for switching range.
P
PA The PA (power amplifier) is a base station module that boosts the exciter
output to transmit level.
PMU The PMU (power management unit) is a module that provides power to the
base station.
pre-emphasis Pre-emphasis is a process in the transmitter that boosts higher audio
frequencies to improve the audio quality.
R
reciter The reciter is a module of a TB8100 base station that acts as receiver and
exciter.
reverse tone burst Reverse tone bursts can be used with CTCSS. When reverse tone bursts are
enabled, the phase of the generated tones is reversed for a number of cycles
just before transmission ceases. If the receiver is configured for reverse tone
burst, it responds by closing its gate.
RSSI RSSI (Received Signal Strength Indicator) is a level in dBm or volts that
indicates the strength of the received signal.
Run mode Run mode is the normal operating mode of the base station.
signalling profile A signalling profile is a named set of configuration items related to signalling
that can be applied to any channel. Items include subaudible signalling and
transmit timers.
S
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).
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