Glossary - Motorola CDR500 Programming Manual

Basic Repeater Controller:
a repeater interface component that connects between
two Professisonal series mobile radios to construct an
intermittent duty radio repeater (identical to the
R*I*C*K).
Bi-directional repeater:
a repeater configuration in which the receive and trans-
mit radios perform both receive and transmit func-
tions. The audio and COR signals from the receiver of
the receive radio are routed to the transmitter of the
transmit radio. Unlike the unidirectional case, though,
the audio and COR signals of the receiver of the trans-
mit radio are also routed to the transmitter of the
receive radio. Example: the receive radio receives a sig-
nal on 456.550 MHz which is re-transmitted by the
transmit radio on 451.650 MHz. The transmit radio
then receives a signal on 451.550 MHz which is re-
transmitted by the receive radio on 456.550 MHz.
Console radio:
a fixed (base station) or a mobile radio installation that
has been designated as the controlling radio for the
repeater or as the "hub" for communications. The con-
sole radio is not part of the repeater hardware.
COR ("Carrier Operated Relay"):
a carry-over term from the early days of repeater oper-
ation. COR is used in its generic sense and does not
necessarily mean only Carrier Squelch operation. For
the CDR500/CDR700 repeater stations, the COR signal
is found on pin 4, pin 8, pin 12, or pin 14 of the 16-pin
accessory jack of the Professional series radio. When-
ever a "properly" identified signal is received, a dc level
change occurs on pin 4, pin 8, pin 12, or pin 14.
COR PTT:
a PTT signal generated by a repeater controller in
response to a "properly" identified signal.
Courtesy "Over" Beep:
An alert tone transmitted by the repeater to denote
reset of the Time-Out Timer of the repeater. Used to
indicate when the next field radio can transmit.
Cross band repeater:
a repeater in which the receive radio operates in a dif-
ferent frequency band than the transmit radio. Exam-
ple: the receive radio operates on 159.420 MHz in the
highband VHF and the transmit radio operates on
451.650 MHz in the 450-470 MHz UHF band. Cross-
band repeaters may be either unidirectional or bi-
directional.
March, 2001
CSQ:
Carrier SQuelch.
CWID:
Morse code station identification. Also referred to as
SID (Station IDentification).
Data PTT:
a PTT signal that is a programmable function on an
input or input/output pin of the accessory connector.
May be used to gate either external microphone audio
(on pin 2) or flat transmit audio (on pin 5) of the acces-
sory connector. "Debounce" of page PTT may be elim-
inated to reduce transmitter turn on/turn off times.
Drop out delay:
the time, in seconds, that the transmit radio remains
keyed, or on the air, after the input signal to the receive
radio ceases. Also known as "transmit (tx) hang time."
EIA de-emphasized audio:
the audio frequency response of the receiver that is
measured at the speaker and at pin 11 of the radio
accessory connector with "Rx Audio Type" pro-
grammed as "Filtered".
EIA pre-emphasized audio:
the audio frequency response of the transmitter for an
audio input to the microphone or pin 2 of the radio
accessory connector.
External PTT:
the PTT signal typically found on pin 3 of the accessory
connector of the Professional series radio.
External Mic Audio:
the transmitter microphone audio found on pin 2 of the
accessory connector of the Professional series radio.
Field radio:
a mobile or portable radio that is neither a part of the
repeater hardware nor a console radio. Field radios
may intercommunicate via the repeater or directly.
Flat audio:
receiver or transmitter audio that does not change
appreciably in amplitude as the frequency of that
audio is varied from 1 Hz to 3 kHz. The receiver audio
response from pin 11 of the radio accessory connector
with "Rx Audio Type" programmed as "Flat Audio"
and the transmitter audio response for input to pin 5 of
the radio accessory connector are "flat."
6864110R66-O

Glossary

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