Retevis RB29, User Manual, Page: 4 / 9

Installing the belt clip
If necessary, attach the belt clip to the back of battery
with the screws supplied carry conveniently.
Getting Acquainted
PTT switch
Side-key
（
You can customize
it in the software
）
Moni switch
Speaker/Microphone Jack
Battery Pack
Battery release latch
Antenna
Channel-selecting knob
Power/volume knob(Power on by
rotating clockwise,Power off by
rotating counter clockwise till
hear the "kata" sound.
VOL control by rotating.)
LED indicator light
(The indicator light turns red
when transmit, turns green
when receive.)
Speaker
Microphone
Basic opeartions
LED indicator
It lights red when transmitting, and lights green when receiving.
Channel-selecting knob
Rotate it to select channel 1-16, clockwise rotation to increase, counter-clockwise rotation to
decrease. An alert tone will sound when an empty channel is selected.
Power/Volume knob
Rotate it by clockwise to power on the radio. To turn off the radio, rotate it by counterclockwise
until a click sound is heard, VOL control by rotating.
PTT switch
Press PTT switch and then talk to the microphone, the indicator light turns red, if the channel
does not have transmitting frequency, a "Du Du" tone sounds, and indicator light turns red.
Release PTT switch to receive. It lights green when there is signal.
Side-key
Can be defined in the software as null / VOX/ emergency alarm / scan / busy lock, the default
definition is short press scan switch, long press VOX switch.
Moni switch
Press the button to monitor calls with different mute tones at the same frequency, and also press
to listen when the signal strength does not reach the opening threshold.
Squelch level
The squelch level will determine the signal strength to open the speaker of the radio. If the
squelch level is lower, the background noise of opening the radio's speaker will be higher,
and the corresponding communication range will be further, but the anti-interference
ability will be weaker. The default setting of squelch level is 3, you can adjust it through
the menu "Squelch level" of the "Optional features" in the software, level 0 to 9 can be
selected. 0 is the lowest level.
Time out timer (TOT)
The purpose of TOT is to prevent any radio from talking in one channel for too long, and to
prevent the radio from being damaged due to continuous transmission. If the transmitting time
exceeds the TOT pre-set time, the radio will stop transmission and an alert tone sounds.Release
PTT switch to stop the alert tone, the radio resume to receiving mode.
Scan On/Off
When the radio is set as scan via software, rotate the channel-selecting knob to channel 16, it
will start scanning. It will scan all scannable channels from channel 1 to 16. You can define as
channel added or deleted in software. When there is signal in the scanning channel, it stops in
the channel for talk.
Note:
a. The radio will stay in the channel which has signal, and 15 seconds after the signal disappears,
it will continue scanning.
b. It can not scan when there is less than 2 scannable channels.
VOX
Speak to the microphone in normal voice to transmit directly, no need to press PTT switch.
Side-key can be defined as VOX switches in the software.
1) When VOX is on in your working channel.
Speak to the microphone directly, it will transmit automatically.
The radio stops transmitting when there is no voice, and waits for receiving.
2) When a headset with a microphone is used.
When VOX is on, you should increase the VOX gain for the radio to identify voice volume.
lf microphone is too sensitive, the noise around radio will start transmitting. If microphone is not
sensitive, the radio can not collect your voice.