User Guide

8
Channel Information
The TD-777S radio has 22 channels, you can edit the channel number and channel
information according to your needs. The following is an introduction to each term.
Name
Meaning
Setting
Description
QT/DQT
Dec
Receiving
CTCSS/DCS
Refer to the DCS table
and CTCSS table in the
manual.
Mutes the speaker of the transceiver in
the absence of a specific low level digi
tal signal. If the station you are listenin
g to does not transmit this specific sign
al,you will not hear anything.
QT/DQT
Enc
Transmitting
CTCSS/DCS
Refer to the DCS table
and CTCSS table in the
manual.
Transmits a specific low-level digital signal
to unlock the squelch of a distant receiver
(usually a repeater).
TX
POWER
Transmit power
HIGH/LOW
High power:2W
Low power:0.5W
Compander
OFF/ON
The compander can effectively compress
part of the transmitted set signal before
transmitting it to the other end, and then
expand the signal at the receiving end.Also
can noise reduction which improves the
sound clarity and reduces the static hissing
sound between two transmitted.(Notice:If
compander is selected “on”, the other party
also needs to selected “on” to talking )
Scramble
OFF/ON
Scrambles your voice so eavesdroppers will
not understand your conversation. Open
this function can protect the conversation
privacy. (Notice: All device be set to work
in the scrambled mode under same level).
Frequency
hop
OFF/ON
To further foil eavesdroppers, both your
information and the pseudo noise codes
hop from frequency to frequency. So that
other machines can’t receive your TX and
RX frequency,then your communication
will be privacy.(Notice: If frequency hop is
selected “on”, the other party also needs to
selected “on” to talking)
Scan add
OFF/ON
In the scan mode, whether add the channel
to the scan list.
ON: the channel is added to scan list;
OFF: the channel cannot be scanned.