Retevis RT665 User manual

RT665
Two Way Radio
User’s Manual
(EN / DE / FR / IT / ES)
v- v+

WARNINGS
Product safety and RF Exposure for two way radio:
Before using this two way radio, please read
the manual which contains important operating
instructions for safe usage, RF Energy Awa-
reness, control information and operational
instructions for compliance with RF Energy
Exposure limits in applicable national and
international standards, and also read the
operational instructions for safe use.

Function Operations
Menu Operation
Standard Accessories
Charging the Battery Pack
Optional Functions
Technical Parameters
Contents
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Charging
Port
Speaker
Volume -
Volume +
Function Key
PTT
Channel +
Channel -
Earphone
LCD
Antenna
01
Function Operations

02
Radio body User’s ManualType-c USB
Standard Accessories
1. Long press the FUNCTION KEY for two seconds to turn on the
transceiver.
2. Channel+/Channel-: adjust the channels, the screen displays
the current channel.
3. V+/V-: adjust the volume,there are 8 levels.
4. PTT: press this button whenever you wish to talk with the user
of the other radio.
5. Short press the FUNCTION KEY to enter into the clock
adjustment mode,then press the V-/V+ buttons to adjust the
time,press the key to exit.
Memu Operation

1. The battery is not charged in the factory,please charge the battery
under the environmental temperature 5 - 40℃ before using.
2. After purchasing or long-term storage(more than two months),
charging the battery for the first time can not reach its saturation
capacity, repeat charge/discharge for twice or three times to make
battery capacity achieve the best state.
3. Before charging, please power off the transceiver,using the
transceiver during charging may affect correct charging.
4. If the battery has been charged fully,please do not charge it again,
otherwise the service life of the battery may be shorten or may be
damaged.
5. If the service time is significantly reduced even after completely
correct charging, the battery can not be used any more, please
replace a new battery.
Charging the Battery Pack
● Scanning
It is convenient for the user to search for calls from other channels.
When【Channel-】is programmed to the scanning function, long
press【Channel-】key for two seconds to enter into the scanning
mode; operate it again or switch the channel to exit.
● Keyboard Lockout
Press both【Channel+】【Channel-】keys to lock all buttons,
operate them again to unlock.
● Monitoring
This operation is used when you wish to adjust the volume level or
Optional Functions
03

if you need to receive signals that are weak.
Long press 【Channel+】key for two seconds to enter into the
monitor mode,release it to exit.
● Emergency Alarm
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 switch and the transceiver will return to
standby.
● VOX
This function can be voice activated so the user doesn't have to
press the PTT key. Switch to Channel 7, turn 0ff the transceiver,
then press the FUNCTION KEY and【Channel+】key and turn
on the transceiver at the same time.
● 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.
● Scrambling
It is a voice encryption mode which is different from sub audio.
● 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.
● Busy Channel Lockout
The function can prevent interference from other transceivers
using the same channel.
04

05
● Companding
It is a function setting which prevents the inter-channel
interference.
● 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 codes on the
channels is ordinary codes, we can talk to each other with the
same CDCSS; Special Signaling refers to the CDCSS codes on
the channels is special processed codes. When the transceivers
in one company are programmed the same frequency with the
same CDCSS and special signaling, they can avoid the signal
interferences from the other companies’ transceivers.
● CTCSS/DCS
The transceiver has 50 CTCSS and 208 DCS, also nonstandard
subaudio can be programmed! CTCSS function is used to avoid
mutual interference among various users and also to avoid
hearing irrelevant calls and interference signals. CDCSS is a
further development of the continuous tone-coded squelch system
or CTCSS that uses a slow-speed,binary data stream passed as
sub-audible data along with the transmission. It adds a tone into
your transmission at a certain frequency.

06
Technical Parameters
SPECIFICATIONS
Frequency Range
Supply Power
Memory Channel
Antenna Configuration
Working temperature range
Dimension
PMR446
DC3.7V（polymer battery）
16
Internal Antenna
-30℃-+60℃
103x40x23.8mm
Work Mode Co/Differ-frequency
Simplex Communication
TRANSMITTER
Output Power
Modulation Mode
Max.Frequency Deviation
Sparious Radiation
Preemphasis Character
Emission Current
≤0.5W
FM(F3E）
≤5KHz
≤7.5μW
Per Octave 6dB
≤1000mA
RECEIVER
Sensitivity
Audio Power
Audio Distortion
Intermodulation Interference Resistance
Receiving Current
Standby Current
＜0.16μV（12dB SINAD）
≥300mW
＜5%
≥60dB
≤300mA
≤20mA
We May Change The Specifications For Technical Improvement Without Prior Notice.
*

WARNUNGEN
Produktsicherheit und HF-Exposition für Funkgeräte:
Bevor Sie dieses Funkgerät verwenden,
lesen Sie bitte das Handbuch, das wichtige
Betriebsanweisungen für die sichere
Verwendung, die Erfassung der HF-Energie,
Steuerinformationen und Bedienungsanwei-
sungen enthält, um die geltenden nationalen
und regionalen Grenzwerte für die
HF-Energieexposition einzuhalten.