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Basic Operation - Retevis RB87 User Manual

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BASIC OPERATION

Channel Selection
Press【UP】【DOWN】keys to adjust the channels.
PTT Key
Press this button whenever you wish to talk with the user of the other radio.
Monitoring
Press 【UP】 key for two seconds to enter into the monitor mode,release it to exit.
Channel Lockout
Press both【UP】【DOWN】keys to lock; Operate them again to unlock.
Scanning
It is convenient for the user to search for calls from other channels.When"Side Key 2" in the software is programmed
to the scanning function,press 【DOWN】 key for two seconds to enter into the scanning mode,the transceiver will
start to scan with the current channel;Operate it again to exit.
VOX
This function can be voice activated so the user doesn't have to press the PTT key. Switch to Channel 7,turn off the
transceiver,then press the 【UP】 key and turn on the transceiver at the same time to switch between the ON and
OFF of the VOX function. VOX gain inversion level refers to the voice sensitivity,it has level 1-9!
Busy Channel Lockout
The function can prevent interference from other transceivers using the same channel.
Battery Power Saving
If there is no signal or operation,the radio will reduce its power consumption.The battery power-saving function
activates when the channel is unoccupied or has not been in operation.
Low Battery Warning
If the battery power falls to the predetermined value during transmission,the transceiver will give out a voice
prompt,please charge in time.
Time Out Timer(TOT)
The purpose of the TOT is to prevent any single person from using a channel for an extended period of time.An
alarm will sound if the transmission continues beyond the set time.The transceiver will stop transmission if this occurs.
To stop the alarm,release the PTT key and the transceiver will return to standby.
CTCSS/DCS
The transceiver has 50 CTCSS and 208 DCS,also non-standard subaudio can be programmed!
CDCSS Mode
It is valid only when you program the CDCSS on the channels. This function has two selections: "normal signaling"
and "special signaling".Normal Signaling refers to the CDCSS on the channels is ordinary codes,we can talk to each
other with the same frequency point and the same CDCSS.
Special Signaling
Special Signaling refers to the CDCSS on the channels is special processed codes.Only when the transceivers in
the same company are programmed the same frequency point with the same CDCSS and meanwhile special
signaling is programmed,then they can talk to each other.
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