Kenwood TM-451A - Manual (Page 121)

Sub-band Transceiver Lock
A band on which this transceiver is only capable of
receiving. No transmit functions are possible on a Sub­
band. See Main Band.
SWR (standing wave ratio)
An antenna that is not correctly matched in impedance
with a transmission line and transmitter will reflect some
portion of the transmitted signal back toward the
transmitter. This causes a standing wave pattern to
develop. The ratio of maximum to minimum voltage
(VSWR) on the transmission line when such a condition
exists is commonly referred to as the SWR.
TO (Time-operated) Scan
When scanning, scan stops at all carriers received and
resumes after 5 seconds.
Tone Alert
A function that alerts an operator via a visual and audible
alarm when the receiver squelch opens.
Tone frequency
See "Subaudible Tone".
TOT (Time-out Timer)
A function that automatically forces a transceiver from
Transmit back to Receive after expiry of a timer.
A function that disables most buttons and controls on the
transceiver.
Transmit Inhibit
A function that stops a transceiver from transmitting.
The function has no effect on the receiver or receive
functions.
Transmit offset (shift)
All Amateur voice repeaters operate on separate transmit
and receive frequencies. Transmit offset is the amount
that a transmit frequency is different from a receive
frequency. See "Transmit offset direction".
Transmit offset (shift) direction
Refers to the direction, either plus (+) or minus ( - ),
that a transmit frequency is with respect to a receive
frequency. Both the direction and amount of offset must
be selected correctly to access a repeater. See
"Transmit offset".
VFO (variable frequency oscillator) mode
The mode that allows any individual frequency to be
selected within the range of the VFO only restricted by
frequency step limitations. When in VFO mode,
frequencies are selected using the Tuning control or the
microphone [UP]/[DWN] buttons.
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