Tait TB8100 Service Manual page 301

sensitivity
SINAD
Sleep mode
Standby mode
status message
subaudible
signalling
subtone
switching range
system flag
system interface
T
TB8100 Base Station
TB8100 Service Manual
© Tait Electronics Limited September 2006
The sensitivity of a radio receiver is the minimum input signal strength
required to provide a useable signal.
SINAD (Signal plus Noise and Distortion) is a measure of signal quality. It
is the ratio of (signal + noise + distortion) to (noise + distortion). A SINAD
of 12dB corresponds to a signal to noise ratio of 4:1. The TB8100 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.
Sleep mode is a power saving state in which a part of the base station is
switched off, and then periodically switched on again.
Standby mode is a mode of base station operation in which active service is
suspended so that special operations can be carried out, such as
programming the base station with a new configuration.
A status message is a set of information about the base station that can be
emailed. It identifies the base station, indicates the current operating
channel, lists the status of all alarms, and gives the current values of a number
of other monitored parameters. It also contains the alarm log.
Subaudible signalling is signalling that is at the bottom end of the range of
audible frequencies. The TB8100 base station supports CTCSS and DCS
subaudible signalling.
A subtone (subaudible signalling tone) is a CTCSS tone or a DCS code.
The switching range is the range of frequencies (about 10MHz) that the
equipment is tuned to operate on. This is a subset of the equipment's
frequency band.
System flags are binary indicators that are read and set by Task Manager.
Generally, they are used to disable or enable configured base station
functions.
The system interface is the set of inputs to and outputs from the base station
(excluding power and RF), provided by a board inside the reciter. A range
of different boards are available for different applications.
A Tait TB8100 base station consists of the equipment necessary to receive
and transmit on one channel. Generally, this means a reciter, a PA, and a
PMU. Often abbreviated to TB8100 or base station.
Glossary 301