Retevis RT619 Manuel De L'utilisateur page 6

Shortly press " - " key, volume down. You will hear the "beep" tone.
Short press " " key switch(under the main volume mode).
Shortly press " + " key, to increase channel number.
Shortly press " - " key, to decrease channel number.
Key lock
Press the " - "for 2s enter the key lock mode, press " - " the for 2s again
out of the key lock mode.
Squelch(SQL) Function
Press the " + " for 2s, Trun on SQL, Release the " + "close the SQL.
Low Voltage Warning
Flashing red when the battery is low, And prompt "please charge"
Scrambler
There are eight sets of scrambling groups available, scrambling encryption.
Frequency Hopping
Frequency hopping encryption, three frequency hopping modes are
available, and can be used suited with other models.
Voice Companding
Turn on this feature to eliminate background noise.
Main Mode
The factory main mode is the audio mode, which can be programmed in
the main channel mode via software. 5s no operate, it will automatically
adjust back to the original mode.
VOX
VOX function frees your hand without pushing the PTT button for
transmission. It uses voice to transmit, when the voice stops then
transmitting stops automatically. Users can use programmable software
to ON/OFF this function.
TOT
The purpose of the tot is to prevent any signal person from using a
channel for an extended period of time.If the transmission continues
out of set time, the transceiver will stop transmission and give out alarms.
To stop the alarms, please release the PTT switch and the transceiver
will resume the state of standby.
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