Retevis H-777, User Manual, Page: 10 / 12

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Retevis
When a signal is received or an operation is performed, Battery
Saver turns OFF.
BATTERY LOW ALERT
Battery Low Alert reminds you of recharging.
When the battery power is very low, an alert tone will sound and
the LED indicator will blink red. Please recharge or replace the
battery pack.
MONITOR
When you are receiving and no signals present, the squelch
function can mute the speaker, so you can not hear the background
noise. If you want to switch the squelch function OFF, press and
hold [MONI] button. It is very helpful when you want to adjust the
volume level and receive the weak signals.
BUSY CHANNEL LOCK-OUT (BCL}
Busy Channel Lock-out function can be turned ON/OFF with
program software on every channel.
When activated, BCL prevents you from interfering with other
parties who may be using the same channel that you selected.
Pressing the PTT switch while the channel is in use will cause
your transceiver to emit an alert tone and transmission will be
inhibited (you cannot transmit). Release the PTT switch to stop
the tone and return to receive mode.
CTCSS/DCS
CTCSS (Continuous Tone Coded Squelch System)/ (Digital Coded
Squelch) You may sometimes want to hear calls from only specific
persons or groups. In this case, use the selective call which allows
You to ignore unwanted calls from other persons who are using
the same frequency.
Retevis
CTCSS or DCS is a sub-audible tone and is selectable from among
the 39 or 83 tone frequency listed.
Note:
CTCSS and DCS do not cause your conversation to be private
and scrambled. It only relieves you from listening to unwanted
conversations.
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