HYT TC-300 Owner's Manual page 33

CTCSS/CDCSS
Battery Save
Time-out Timer (TOT)
Squelch
Squelch Off
Monitor
Momentary
radio and the radio is in receiving status.
CTCSS/CDCSS is transmitted along with the
carrier and at a sub-audible frequency. The Tx
CTCSS/CDCSS of the transmitting party must
match the Rx CTCSS/CDCSS of the receiving
party, for the receiver to unmute speaker and output
audio.
This function can save battery power and prolong
radio operation time. Once no activity on the
channel and no operation performed, the radio shall
be on and off alternately.
Limits the amount of time the radio user can
continuously transmit on a channel. This can also
protect your radio from damage due to excessive
transmission.
Eliminates noise from the radio's speaker. If the
incoming signal is not strong enough to produce a
clear transmission, then it should not be heard. This
helps to filter out unwanted noise. If the incoming
signal strength satisfies the squelch threshold, the
radio shall open squelch and unmute its speaker.
Always unmute speaker to receive audio as well as
background noise.
Carrier condition must be satisfied for the radio to
unmute to an incoming call, regardless of
CTCSS/CDCSS condition.
Holds down a function key to activate the status,
and release it to exit. Non-momentary: Press a
function key to activate the status, and press it
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