Tait TB8100, Service Manual

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302 Glossary TB8100 Service Manual
© Tait Electronics Limited September 2006
Talk Through
Repeater
A TB8100 is a talk through repeater when its audio path is configured to
pass the audio it receives on to the transmitter.
Task Manager
Task Manager is a part of the TB8100 base station firmware that carries out
tasks in response to inputs. These tasks are formulated using the Service Kit.
template file
A template file contains configuration information that can be used to create
a new base station configuration. Template files have the extension *.t8t.
transmit lockout
The transmit lockout feature prevents the base station from transmitting for
a time once the transmit timer has expired. It is designed to prevent users
from monopolising the base station.
U
Unbalanced line An unbalanced line has one wire earthed. It is typically used for short
connections, for example, between a base station and a repeater on the same
site. The system interface identifies the wires of unbalanced lines with Rx
audio, Tx audio, and Audio Ground. Audio Ground is common to line-in
and line-out.
V
valid signal
A valid signal is a signal that the receiver responds to by opening the receiver
gate. A signal is valid for example when it is stronger than a minimum level
and when it has the specified subtone.
VSWR Voltage Standing Wave Ratio (VSWR) is the ratio of the maximum peak
voltage anywhere on the transmission line to the minimum value anywhere
on the transmission line. A perfectly matched line has a VSWR of 1:1. A
high ratio indicates that the antenna subsystem is poorly matched.
W
Watchdog
A watchdog circuit checks that the system is still responding. If the system
does not respond (because the firmware has locked up), the circuit resets the
system.