This article covers Hirelax MMDVMデジタルボイスモデム 3.5インチカラースクリーン搭載 DMR D.

Overview

The Hirelax MMDVM Digital Voice Modem is a versatile hotspot module designed for amateur radio enthusiasts. It features a 3.5-inch color screen that clearly displays communication status and configuration details. The unit supports six major digital voice protocols: DMR, D-Star, YSF(C4FM), P25, NXDN, and POCSAG, allowing easy mode switching with simple frequency offset adjustments. A temperature-compensated crystal oscillator (TCXO) ensures low bit error rates (BER) during extended operation. Dual network connectivity via WLAN and an Ethernet port provides flexible integration into your home network.

Key Features

3.5-inch color screen: Provides clear, high-visibility display of real-time status and settings. Beginners can navigate intuitively. Multi-protocol support: Covers DMR, D-Star, YSF(C4FM), P25, NXDN, and POCSAG. After calibration, audio quality is stable, and mode switching is as simple as fine-tuning the frequency offset. TCXO for stable performance: The temperature-compensated crystal oscillator minimizes frequency drift over long operating sessions, ensuring low BER and reliable communication. Optimized thermal design: Component layout reduces heat generation and improves heat dissipation, making the unit suitable for 24/7 operation. * Dual networking: Built-in WLAN and a standard Ethernet port give you the flexibility to connect via wireless or wired LAN.

Connectivity & Compatibility

The modem includes WLAN (Wi-Fi) and a standard Ethernet (RJ45) port, enabling flexible connection to your home router or network switch. It supports six digital voice protocols: DMR, D-Star, YSF(C4FM), P25, NXDN, and POCSAG. No external antenna port is provided; the internal antenna covers typical indoor ranges. Power is supplied via USB (5V/1A minimum; power adapter not included). The module is compatible with popular MMDVM hotspot software such as Pi-Star.

Product Info

The Hirelax MMDVM Digital Voice Modem is available on . The price typically ranges between ¥8,000 and ¥12,000 (subject to change). Warranty varies by seller but generally covers 30 days for initial defects. The package includes the modem, a USB cable, and a quick start guide. An AC power adapter is not included. The manufacturer is Hirelax (China); no official Japanese distributor exists.

Best Use Cases

Amateur radio operators looking to set up a home digital voice hotspot, especially those already using DMR or D-Star. One unit adds multi-mode capability easily. Intermediate to advanced hams wanting to experiment with multiple digital protocols on a single device. * Users who require reliable 24/7 operation. The TCXO and efficient thermal design make the modem suitable for always-on duty. Note that initial configuration requires some familiarity with MMDVM and Linux-based hotspot software (e.g., Pi-Star). Beginners should research setup guides before purchasing.

Product Disclosure (Amazon)

  • Manufacturer: Hirelax
  • Seller: CHICIRIS JP
  • Fulfilled by: CHICIRIS JP
  • ASIN: B0GYNH9XBF
  • Note: This article covers a manufacturer-made product based on Amazon listing details.