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

SCT9377 DMR basestation baseband module

Overview

SCT9377 is a digital repeater baseband processing module, developed by Sicomm and Abell.

It consists of 3 functional modules: master MCU, repeater processing baseband (SICOMM SCT3252B), voice and call control baseband (SICOMM SCT3258).
The product complies with ETSI TS 102 361 (DMR) digital radio standard.
At the same time, it is compatible with the RF channel of the original analog basestation, which can meet the needs of customers to quickly carry out DMR relay station, analog relay station and dispatching station development, and can realize voice relay monitoring and voice calling active initiation function.
And it's compatiable with analog RF channel. It's a good choice for who want to implement a DMR basestation, analog basestation or dispatch station fastly.

SCT9377 supply a UART and a standard SPI interface. It's useful for secondary development.

Technical characteristics

• Data transmission rate：4.8kbps/single time slot，9.6kbps/dual time solt
• Voice transmit rate：4.8kbps×2
• Channel spacing：digital 12.5kHz，analog 12.5kHz/25kHz
• Bit error rate：Eb/N0=7db BER=5×10-2
• Working voltage：5~15VDC
• Maximum operating power：0.150A @5 VDC
• Working temperature: -30～70℃
• Dimensions：104.5mm×151.5mm×22.5mm

Features

• High performance 4FSK modem and channel codec
• DMR basestation protocol processor compliant with DMR Tier I/II standard
• Built-in AMBE+2 vocoder
• Support dual-frequency, single-frequency relay mode
• Supports FM analog, FM modem, emphasis, de-emphasis, support for analog and digital sub-tone signaling
• Supports digital and analog check, analog and digital transfer in mixed mode
• Mixed mode active call optional digital transmission or analog transmission
• Voice down, can achieve relay local playback, monitor relay voice
• Channel hold time configurable: idle, voice call and data communication
• The active call type can be changed, you can choose: one call, group call, full call
• Device ID and active call ID can be changed to support changing the local ID of the relay
• Support voice monitoring and active calling
• Support monitoring and active sending of data communications
• Supports baseband demodulation and two-point or single-point modulation and other RF interfaces
• Support address selective filtering
• Support PC software configuration
• IP link, roaming (requires mainboard support)
• Relay of full-duplex communication (requires mainboard support)

Typical applications

• Personal digtal radio repeater
• Digtal radio basestation

Product photo

Block diagram