User's Manual

Table Of Contents
DRAFT 1
118 Glossary TB9300 Installation and Operation Manual
© Tait Limited May 2013
FM Frequency Modulation. Often used as an adjective to denote analog radio
transmission.
frequency band The range of frequencies that the equipment is capable of operating on.
front panel The cover over the front of the base station containing the indicator LEDs,
four-line LCD display, user controls and cooling fans.
gating The process of opening and closing the receiver gate. When a valid signal
is received, the receiver gate opens, letting the signal through.
group call A call that is sent to more than one MS simultaneously.
heartbeat message A message whose purpose is to indicate to the receiver that the sender is
operational.
hiccup mode Many power supplies switch off in the event of a short-circuit and try to
start again after a short time (usually after a few seconds). This “hiccup”-
type of switching off and on is repeated until the problem is eliminated.
hostname The unique name by which a network element is known on the network.
hub A unit for connecting hosts together. It sends all incoming Ethernet packets
to all the other hosts.
hysteresis The difference between the upper and lower trigger points. For example,
the receiver unmutes when the upper trigger point is reached, but will mute
again until the level falls to the lower trigger point. An adequate hysteresis
prevents the receiver gate from repeatedly muting and unmuting when the
level varies around the trigger point.
I
2
C A bi-directional two-wire serial bus which is used to connect integrated
circuits (ICs). I
2
C is a multi-master bus, which means that multiple chips
can be connected to the same bus, and each one can act as a master by
initiating a data transfer. Used in the TB9300 for communications between
each reciter and its associated PA, and between reciter 1 and the PMU.
inbound Describes the direction of a signal: from an MS over the air interface to the
fixed station.
IP Internet Protocol is a protocol for sending data packets between hosts.