Digital Walkie Talkie ICs

• Baseband:SCT3288
• Baseband:SCT3258
• RF transceiver:SCT3811
• RF transceiver:SCT3700
• RF PA(2W):SCT3604

Digtal radio & Basestation modules

• Basestation:SCT3252B
• Digtial basestation module :SCT9377
• Digital radio module:SCT9388

Voice & Wireless ICs

• Voice processor:SCT2088
• 2.4GHz Transceiver:SCT2400

Analog Walkie Talkie ICs

• RF PA(2W):SCT3604

SCT9388 Digital Walkie-Talkie Module

Overview

SCT9388 consists of a built-in MCU, a digital base band chip (DSP), a RF transceiver and a RF power amplifier. Communications between SCT9388 and peripheral devices can be achieved through UART port. SCT9388 is featured with impact design and simple interfaces, by which it can be integrated into various devices. The integrated DSP contains entire protocol stack of DPMR and DMR, including physical layer, data link layer, and call control layer. The employed modulation scheme is 4FSK, which supports both of voice and data service. Data rate is 4.8 kbps.

Features

• Full frequency range 400 – 470 MHz
• Tx frequency and Rx frequency can be set separately
• RF Bandwidth 6.25 kHz (DPMR), 12.5 kHz (DMR and Analog)
• Adaptable output power up to 2 W
• High Rx sensitivity <= -116 dBm (Analog)
• High integration with impact design
• Support DPMR, DMR and compatible with analog mode
• Wide working voltage range 3.3 – 5.0 V

Function description

• Compatible with conventional analog mode for voice/CTCSS/DCS
• Private call
• Group call
• Relay mode
• Short message service
• Encryption
• Multi-vocoder
• Confirmed private call
• Support customer programming software (CPS)
• Power saving mode
• Selectable transmission speed
• Clear data transmission
• Call alert
• Radio check
• Automatic detection and switch between digital and analog modes

Applications

• Building/community security
• Outdoor sports
• Wireless data transmission
• Handset integrated with digital walkie-talkie

Block diagram