Retevis RT618 User Manual page 3

Function Operation
Radio Information
1-Indicator
Green light flashes when radio is receiving. Red light flashes
when radio is transmitting.
2-Channel Switch
Choosing desired channel to communication from 1-16.
When the UP button is pressed, increase the channel No..
When the DOWN button is pressed, the channel drops and
recycled.
3-Power Switch
Press the power button about 2 seconds to turn on the radio.
Press the power button about 2 seconds to turn off.
4-PTT
The radio has two PTT switches on the side and the front.
Press PPT and face to microphone to communicate with the
others. Red light flashes. Release PTT to receive and the
green light flashes.
5-Monitor
Long press channel UP key can turn on monitor function.
Press it again to turn off the monitor function.
6-Squelch level
The purpose of the squelch is to mute the speaker when no
signals are present Lower squelch level, high background
noise hear. longer communication range, weaker the
anti-inference.
Default squelch level is 5 and can be programmed level 0-9
by PC.
Level 0 is to open the squelch. The higher the selected
squelch level. the stronger the signals must be when
receiving.
7-TOT
This function can prevent users occupied the present channel
for long time and limit TX time, meanwhile prevent radio from
damage by long time transmitting If radio continue TX over
the limit time (set by the programming software), radio will
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quit TX and sounds a warning sound. To stop warning sound, release
the PTT, radio will back to the receiving state.When TX over
time, through the bell to carry out early warning in advance(set by
program software).
8-Scan
When the radio enters channel 16, it enters into the scanning function
automatically.
9-CTCSS
Check the Hopping option of program, CTCSS can be programmed
Non-standard TONE, increasing voice privacy.
10-Language
Please choose the desired language by PC program software.
11-Power Saving Function
Please select to active or disable the power save function by PC
program software.
12-Battery Voltage Alert
When the battery voltage is lower than a certain level, the voice will
sound "please charge", and prohibit transmitting.
13-Busy Channel Lockout
If radio programmed with BCLO, pressing PTT to prohibit TX after
receiving the signal.
14-High /Low Power Switch
Radio default setting is high power. You can switch high /low power
by PC programming software.
15-Wide/Narrow Band Selection(25.0KHz/12.5KHz)
Radio default setting is wide band. You can select wide /narrow band
by PC programming software.
16-VOX
Enable or disable VOX by PC programming software. When your
radio turn on the VOX function, talking to the microphone, then voice
will be sent out; Stop talking, then radio will be in receiving state.when
you use the earphone, need to adjust the VOX level in an appropriate
level. If the microphone is too sensitive, the noise will activate
transmitting; If the microphone is not sensitive enough, your voice will
not activate transmitting. In order to communicate
successfully,please adjust the appropriate level.
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