Motorola CDR500 Programming Manual page 100

Glossary
i20R:
a repeater controller that provides service for up to 10
different user groups (TPL/DPL).
Linked Repeater:
a uni-directional repeater that sends receiver audio
and COR signals to an external "link" radio (or another
repeater) for the purpose of relaying repeated informa-
tion to another location. Receiver audio and COR sig-
nals from the "link" radio are applied to the CDR500 or
CDR700 repeater transmit radio as transmit audio and
PTT signals. For example, VHF coverage can be
extended between two cities with a UHF link between
the two VHF, uni-directional repeaters.
LTR:
Logic Trunked Radio. A trunking system protocol
based upon low speed (300 bauds), subaudible signal-
ling to control radio traffic.
LTR Repeater Controller:
a repeater controller that supports the LTR protocol.
Provides the interfacing and controlling of the receiver
and the transmitter of a repeater. May include other
features for telephone interconnect and support for
"older" TPL and DPL based systems.
Normal receiver audio:
see EIA de-emphasized audio.
Normal transmitter audio:
see EIA pre-emphasized audio.
"On Battery" Alert Tone:
an alert tone ("beep") transmitted periodically to indi-
cate to field radio operators that the repeater is operat-
ing on a battery backup power source and they should
limit their transmissions (number and duration).
Requires external switching source such as battery
revert module.
PAC*RT:
Portable Area Communications RepeaTer; a special-
ized cross band, bi-directional repeater configuration.
Example: paramedics at an accident scene may use
450-470 MHz UHF portable radios to communicate
with a highband VHF dispatcher.
Power-up:
the initial application of operating potential (voltage)
to the radios and the repeater controller.
"Properly" identified signal:
all signals being received on a CSQ receiver or those
signals with the correct TPL tone or DPL code being
received on a coded squelch receiver.
Receive radio:
the radio that performs the receiving functions in the
CDR500/CDR700 repeater station.
Repeater controller:
a module or option card that fits into the CDR500/
G-2
CDR700 repeater station and provides the control of
the repeater radios.
Repeater knockdown:
to deactivate a repeater or to remove it from service.
Repeater setup:
to activate a repeater or to place it into service.
Revertive signalling (paging):
accessing a repeater with one signalling format (e.g.,
DTMF) and selective signalling with a different format
(e.g., MDC-1200).
R*I*C*K:
a repeater interface component that connects between
two Professional series mobile radios to construct an
intermittent duty radio repeater (identical to the Basic
Repeater Controller).
Selective signalling (calling):
a method of signalling with TPL, DPL, multiple tones
or digital words to alert an individual radio user in a
group.
Single band repeater:
a repeater in which both the receive radio and the
transmit radio operate in the same frequency band.
Example: receive at 456.650 MHz and transmit at
451.650 MHz in the 450-470 MHz UHF band.
ST-853M SmarTrunk II:
a repeater controller that allows trunking operation.
Up to 4096 subscriber units (field radios) with individ-
ual identification can be serviced. Telephone intercon-
nect, individual and group selective calling are
supported.
Transmit radio:
the radio that performs the transmitting functions in
the CDR500/CDR700 repeater station.
Unidirectional repeater:
a repeater configuration in which the receive radio
receives signals only from the field radios and the
transmit radio transmits signals only to the field
radios.
VOX:
voice controlled transmission; the transmit radio is
keyed by a circuit that detects the presence of voice
output from the receive radio or from a telephone line.
ZR310:
a repeater controller that provides individualized
repeater service for up to 70 different customer groups
(TPL/DPL).
ZR340:
a repeater controller that provides telephone intercon-
nect with expanded sign-on/sign-off code features and
CWID for the single user repeater.
6864110R66-O
CDR500 & CDR700 Repeater Service Manual
March, 2001