Retevis RA685, Руководство пользователя, Страница: 14 / 84

USB charging
The walkie-talkie can be directly plugged into the USB charging cable and charging with a power bank.
Frequency measurement function
Press +
〖
*
〗
key to enter the frequency measurement mode, press
【
▲
】
or
【
▼
】
key to select U segment or V
segment. When a signal is received, if the current frequency has a mute tone, it will be displayed on the screen
at the same time, press the key The current frequency can be saved. Or you can select the shortcut operation
method by pressing the side button.
Special digital mute
The special digital mute is a mute encryption function, which can prevent other machines from copying the mute
of this machine. After this function is turned on, only the same DCS code can talk to each other. The mute
encryption function is effective only when the DCS mute code is set. Only the same machines with special digital
mute on can talk to each other.
Optional accessories
Please use the accessories specified by our company.
If you use unauthorized accessories without authorization, all consequences caused by this are the responsibility
of the user.
Please consult your local dealer for optional accessories of the walkie-talkie.
Main Specifications
11
All specifications are subject to change without notice or responsibility.
Disclaimer
This manual strives for the accuracy and completeness of the content during the compilation process, but the
company does not assume any responsibility for possible errors or omissions. Due to the continuous
development of technology, the company reserves the right to change product design and specifications without
notice. Without the company's prior written authorization, this manual may not be copied, modified, translated
and distributed in any form. The third-party products and content involved in this manual are owned by the third
party, and our company does not provide guarantees for their accuracy, validity, timeliness, legality or
completeness.
Frequency Range 144-146MHZ(RX/TX) 430-440MHZ(RX/TX)
Channel No. 16
Channel Spacing 25/12.5kHz
Input voltage 7.4 VDC
Battery (standard configuration) 1800mAH(Li-Ion)
Battery Life(5-5-90, High power transmission) About 14 Hours
Current
：
Standby ≤65mA
Receive ≤450 mA
Transmit ≤1.8 A @high power
，
850 mA @ low power
Frequency stability ±2.5ppm
Operating temperature -20
℃
to +60
℃
Antenna impedance 50Ω
Walkie-talkie size(With battery, but without antenna) 121×61×33mm
Walkie-talkie weight(Including antenna and battery) 223g
Transmit output power 5W/3W/1W
Modulation 16K0F3E@25KHz, 11K0F3E@12.5KHz
Spurious emission -36dBm
＜
1GHz
，
-30dBm
＞
1GHz
FM signal-to-noise ratio 45dB@25KHz, 40dB @12.5KHz
Audio distortion ≤5%
Modulation limit ±5.0 KHz@25 KHz
，
±2.5 KHz@12.5 KHz
Adjacent channel power 70dB @ 25KHz
，
60dB @ 12.5KHz
(300-3000Hz) Audio response +1~3dB
Receiving sensitivity 0.25μV (12dB SINAD)
Adjacent channel selectivity ≥60dB@25KHz ,≥55dB@12.5KHz
Intermodulation immunity ≥60dB@25KHz , ≥55dB@12.5KHz
Conducted spurious emissions ≤-57dB@25KHz, ≤-57dB @12.5KHz
FM signal-to-noise ratio ≥45dB@25KHz, ≥40dB @12.5KHz
Audio output power 1W @16ohms
Audio distortion ≤5%
Audio response(300-3000Hz) +1
～
-3dB
TOT
AL
TRANMIT P
ART
RECEIVE