Short Range Devices

Short Range Devices

Short Range Devices (SRD) are radio devices that offer a low risk of interference with other radio services, usually because their transmitted power, and hence their range, is low. The definition 'Short Range Device' may be applied to many different types of wireless equipment, including various forms of:

• Access control (including door and gate openers)
• Alarms and movement detectors
• Closed-circuit television (CCTV)
• Cordless audio devices, including wireless microphones
• Industrial control
• Local Area Networks
• Medical implants
• Metering devices
• Remote control
• Radio frequency identification (RFID)
• Road Transport Telematics
• Telemetry.

Short range devices often benefit from a relaxed regulatory regime compared with other radio communications equipment. As a general principle, a user is licence free to operate such equipment, some specific cases may require an individual licence. However, like all radio equipment, short-range devices have to meet the Radio Equipment Directive (RED) to be placed on the market within the European Community. The operation of the equipment is subject to the frequency management regulations of the relevant member state.

短程设备（SRD）是一种无线电设备，它提供与其他无线电服务干扰的低风险，通常是因为它们的发射功率和射程都很低。“短程设备”的定义可适用于多种不同类型的无线设备，包括各种形式的：

• 门禁（含开门器）
• 警报和移动探测器
• 闭路电视（CCTV）
• 无绳音频设备，包括无线话筒
• 工业控制
• 局域网
• 医用植入物
• 计量装置
• 远程控制
• 射频识别（RFID）
• 道路运输远程信息处理
• 遥测,远距离测量

与其他无线电通信设备相比，短程设备通常受益于宽松的监管制度。作为一般原则，用户无需许可证即可操作此类设备，某些特定情况下可能需要单独的许可证。

然而，与所有无线电设备一样，短程设备必须符合欧洲共同体市场上的无线电设备指令（RED）。设备的操作应遵守相关成员国的频率管理规定。

Below 1GHz(25 MHz to 1 000 MHz )

SRD operating in the frequency range 25 MHz to 1 000 MHz (EN 300 220 series, EN 303 406, 303 204), including SRD in data networks (EN 303 659) and Wideband data transmission SRD (EN 304 220)

Short Range Devices | 25MHz to 1,000 MHz | 300MHz / 433MHz (ISM), 866MHz - EN 300 220 Testing

• ETSI EN 300 220-1 V3.1.1 (2017-02)
  • 在25MHz至1000MHz频率范围内工作的短程器件（SRD）.第1部分：技术特性和测量方法
• ETSI EN 300 220-2 V3.2.1 (2018-06)
  • 在25MHz至1000MHz频率范围内工作的短程装置（SRD）.第2部分：非特定无线电设备无线电频谱接入的协调标准

Above 1GHz(1 GHz to 40 GHz)

EN 300 440 series

• ETSI EN 300 440-1 V1.6.1 (2010-08)
  • Electromagnetic compatibility and Radio spectrum Matters (ERM); Short range devices; Radio equipment to be used in the 1 GHz to 40 GHz frequency range;Part 1: Technical characteristics and test methods
  • 电磁兼容性 无线电频谱管理；短程装置；使用的无线电设备在1GHz至40GHz频率范围内；第1部分：技术特性和试验方法
• ETSI EN 300 440-2 V1.4.1 (2010-08)
  • Electromagnetic compatibility and Radio spectrum Matters (ERM); Short range devices; Radio equipment to be used in the 1 GHz to 40 GHz frequency range; Part 2: Harmonized EN covering the essential requirements of article 3.2 of the R&TTE Directive
  • 电磁兼容性和无线电频谱管理（ERM）.短程装置.1GHz至40GHz频率范围内使用的无线电设备.第2部分：包括符合RED指令3.2条基本要求的协调欧洲标准

SRD for railways

• ETSI EN 302 608 V2.1.1 (2017-11)
  • Short Range Devices (SRD);Radio equipment for Eurobalise railway systems;Harmonised Standard covering the essential requirements of article 3.2 of Directive 2014/53/EU
  • 短程装置（SRD）；欧洲应答器铁路系统无线电设备；涵盖基本要求的协调标准第2014/53/EU号指令第3.2条
• ETSI EN 302 609 V2.2.0 (2020-07)
  • Short Range Devices (SRD);Radio equipment for Euroloop communication systems;Harmonised Standard for access to radio spectrum
  • 短程装置（SRD）；欧洲环路通信系统无线电设备；无线电频谱接入协调标准

Avalanche Beacon

Avalanche　Beacon 也称 Avalanche Transceiver，这里译成雪崩信标机.在雪崩救援中它是最基本和重要的查找工具，配合雪崩探杆和雪铲，可以在16分钟左右将受害者找到并挖出（这时雪崩受害人的生还率是90%），这极大提高了雪崩受害者的生还机率,虽然单只售价高达200-300美圆，依然被冬季户外运动爱好者广泛采用。

• ETSI EN 300 718-1 V2.1.1 (2018-01)
  • Avalanche Beacons operating at 457 kHz;Transmitter-receiver systems;Part 1: Harmonised Standard for access to radio spectrum
  • 457khz工作的雪崩信标.收发系统.第1部分：无线电频谱接入的协调标准

RFID

EN 302 208

below 9 kHz

SRD cover spectrum below 9 kHz like Robotic Mowers (EN303 447), Metal sensors (EN 303 454), Nuclear Magnetic Resonance (NMR) technology (EN 303 658) and Inductive gluing systems (EN 303 734)