Time-Out Timer(Tot); Busy Channel Lockout(Bclo); Squelch Level - Retevis RT669 Manual Del Usuario

Programmable by PC
The radio is connected to the computer through a special cable, which can read and write the
frequency and set the function parameters etc.
CTCSS/CDCSS encode and decode
50 groups of CTCSS and 105 groups of CDCSS encode and decode functions can be set to
prevent unrelated calls received on the same channel.
VOX
Press and hold PTT+DOWN + channel (1-5) to power on, switch the VOX function and switch the
VOX level. The channel 1 is level 1 and channel 5 is level 5.

Busy Channel Lockout(BCLO)

To activate this function, when the channel is being used by other users, press "PTT" key, the
radio will cannot transmit and "beep, beep" prompt sound.
When the channel is idle, press the "PTT" key again and it can be transmitted.

Time-out timer(TOT)

The function of the time-out timer is to prevent the any calling party from using a channel too long
and continuously.
You can set this function through the programmable by PC (time:30 seconds, 60 seconds, 90
seconds, 120 seconds, 150 seconds, 180 seconds). If you continue to transmit beyond the set
time, the radio will stop transmitting and beep. Release the [PTT] button and press the [PTT]
button again to resume transmit.
Monitor
Turn on the radio, press the "DOWN" button for a long time to compulsively open the receiver
and listen to whether there is any voice on the current channel.

Squelch Level

The frequency of squelch is 0 (on) -9 (deep), The corresponding SPK output SNR is 8-18db.