TMC Radio SRP 9100, Service Manual

Page: 14 / 66

Page 1.12
2 ~ SERVICE PHILOSOPHY
TMR
Trunked Mobile Radio.
Tone Burst An audio tone is transmitted at the start of transmission to inform a relay (repeater)
station to switch itself on to relay the transmission.
Transpond An Acknowledge identity sent as a response to an individual call.
TRAXYS
Air Interface for the PTT Telecom Trunked Radio Network, used in the
Netherlands.
TSC Trunking Site Controller. Central control required for the Trunking System to
function. Controls base stations.
Tx Inhibit A facility which prevents the user from transmitting,(other than alarms), while the
channel is Busy.
UMP User Memory Plug. A special device that contains the customisation data for the
radio. If this is removed then this can cause the radio to behave in a number of
ways.
User Defined Groups These groups are set up by the user (contrast with Dynamic User Groups) when
the user desires to be included, temporarily, in an existing group. Up to 8 groups
may be defined (in addition to the Network group Idents defined by Network Group
Numbers). This feature is only available if User Defined Groups parameter is
enabled. These temporary groups are lost at switch off unless 'Save Groups at
Switch Off' is enabled.
User Identity This is a sequence of up to four digits entered by the user when the Radio is
switched on, if this option is programmed. These digits are then substituted into
any transmitted Selcall identity which includes # digits.
VCO
Voltage Controlled Oscillator.
Vote Method used to compare the signal strength on a current channel with another
specified channel and then to choose the channel having the stronger signal.
Voting Feature used during searching when there is more than one channel that satisfies
the required conditions. It involves examining all the channels that satisfy the
required conditions, and then selecting the channel with the highest signal
strength.
VOX Voice Operated Transmit.