SD300 Digital Portable Radio

SD300 Digital Portable Radio

Product Introduction:

SD300 is a compact and lightweight design digital portable radio without display, developed with DMR/TDMA standards 4FSK modulation. It employs digital voice and dual-timeslot technologies to provide superior audio quality and optimal fidelity. It includes several features to enhance performance including: 2 zones 32 channels, dual-time slot, digital voice encryption, VOX, battery save, DCDM(dual capacity direct mode) etc. The battery can get more extra working time compared to analog radio and with longer standby time thanks to DMR and battery save technologies. It provides cost-effective and easy-to-use radio communications with excellent performance for various users. SD300 supports both analog and digital modes, and is compatible with existing conventional analogue radios to ensure a smooth transition from analog products in use to digital products.

Product Dimension:

(Height*Width*Depth) excluding antenna: 108mm*53mm*31.5mm

Product Features:

ØAppearance design (rugged and compact): With compact, lightweight and streamline design to provide with reliable and durable quality!

Ø32 channels and 2 zones: 32 channels and 2 zones to realize high-efficiency channel and group configuration and management.

ØDual capacity direct mode(DCDM): Provide direct mode operation in 2 slots to increase channel capacity without increasing channel frequency spectrum.

ØDigital or analog mode: Supports both digital and analog mode to provide cost-effective way for users to migrate from analog to digital or switch between the two modes for communication with analog radios easily.

ØNoise suppression: Using advanced narrowband voice encoding and digital error correction technologies to provide superior audio quality while in noisy environments or at the edge of the coverage area. The use of AGC technology has also greatly optimized the voice receiving effectiveness. Built-in 1W speaker to ensure superb clear and powerful audio output, to provide with reliable instant communication.

ØVoice encryption: Digital voice encryption to guarantee safety communication and maintain the privacy in your conversation.

ØLonger battery life: Li-Ion battery capacity 2000mAh, the battery can get more extra working time compared to analog radio and with longer standby time thanks to DMR and battery save technologies. 2000mAh – lasts all day long – offers more than 16 hours of talk and standby time on a 5-5-90 duty cycle.

ØFeatures: Supports both digital and analog, programmable side keys, high and low power selective, VOX hands-free voice control, TOT time-out-timer, transmission limit selective, BCL busy channel lock, emergency alarm, talk around; battery save mode and programming password etc.

ØDigital functions: Individual call, group call, all call, voice encryption, remote emergency alarm, remote monitor, remote stun, remote kill, remote activation and SMS function etc.

ØAnalog functions: CTCSS and DCS.

ØDigital and analog mixed modes: It is able to auto detect signal type when receiving a call and automatically switch between digital and analog mode for receiving. The user can reply during the call hang time by using PTT, this feature improve immigration from analog to digital.

ØBattery save and low battery alert: It will be helpful for battery save once it has been activated, and will broadcast alert when battery life is low.

ØEmergency call: One-touch emergency alarm can be sent to other radios with the pre-programmed button, to improve worker safety and emergency response time.

ØDMR: DMR signaling enable individual call, group call and all call, supports DMR Tier 2 repeater to extend coverage.


General Specifications
Frequency Range 136-174MHz/220-260MHz/350-390MHz/

400-480Mhz/450-520MHz etc.

Channel Number 32 CH
Zone Capacity 2 Zones
Channel Spacing 12.5KHz/25KHz
Operating Voltage DC:7.4V±10%
Battery Capacity 2000mAh(Li-lon)
Operating Temperature -30℃~+60℃
Antenna Impedance 50Ω
Weight 215g
Dimension 108mm*53mm*31.5mm
Receiver (RX)
Sensitivity Analog 5%   SINAD: 0.20uV

Digital 5%   BER:   0.20uV

Adjacent Channel Selectivity ≥55dB
Intermodulation ≥55dB
Spurious Response Rejection ≥55dB
Audio Output 750mW
Audio Response (+)1-3dB(0.3-3KHz)
Audio Distortion ≤ 3%
Hum and Noise ≥40dB
Transmitter (TX)
Output Power VHF:5W/1W   UHF:4W/1W
Bandwidth 12.5KHz
Modulation Limit ±2.5@12.5KHz


Modulation Distortion ≤ 3%
Conducted Spurious Emissions -36dBm <1GHz

-30dBm >1GHz

Adjacent Channel Power ≥65dB
FM Hum and Noise ≥45dB
Audio Response (+)1-3dB(0.3-3KHz)
Audio Distortion ≤3%
Digital Vocoder AMBE++
Frequency Stability ±0.5ppm
Analog Modulation 11KφF3E@12.5KHz


4FSK Digital Modulation 12.5KHz Data:7K60F1D/7K60FXD

12.5KHz Voice:7K60F1E/7K60FXE

Digital Protocol ETSI TS 102 361-1,-2,-3

Application Scenarios:

Construction, airport, seaports, security guard, property management, shopping mall, hotel, warehouse, logistics, education, retail, manufacturing, institution, surveying and mapping, hospitality, restaurant, outdoor activity and school etc.

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