Kenwood TM-451A - Manual (Page 116)

CallA^FO Scan
A scan function that allows alternate monitoring of the
Call channel and the current VFO frequency. The
current VFO frequency is the frequency selected or used
last while in VFO mode. See "Scan".
Channel Display
A function that shows only the memory channel number
on the display instead of both the frequency and the
memory channel number.
CO (Carrier-operated) Scan
When scanning, scan stops at all carriers received and
resumes 2 seconds after the carrier stops.
CTCSS (Continuous Tone Coded Squelch System)
Also referred to as Tone Squelch. A method of receiver
squelch control that uses a subaudible tone
superimposed by the transmitter on the transmitted
signal. Only signals received with a subaudible tone that
matches the tone selected at the receiver can open the
receiver squelch.
CTCSS frequency
The subaudible frequencies used by CTCSS.
Default settings
The values selected for VFO frequency, Call channel
frequency, Frequency Step, etc. by the transceiver after
it is reset. All transceivers are shipped from the factory
with default settings.
Display Mode
This function allows you to customize how the
information that appears on the Display is presented.
DTMF (Dual Tone Multi-Frequency) signal
A signal created by combining two discrete audio
frequencies. Generally used for sending digits for
repeater control or Autopatch applications.
DTSS (Dual Tone Squelch System)
A squelch control system that relies on a burst of data
from the transmitter to open the receiver squelch. Only
when the transmitted code matches the code
programmed in the receiver will the squelch open.
DTSS Transmit Delay
The delay intentionally introduced at the transmitter to
delay transmission of DTSS codes after [PTT] is
pressed. The delay can improve the reliability of DTSS
when communicating with a receiver with slow response
time.
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