FCC DFS Master Issue

血沁玉

  FCC DFS Master Issue---2009-10-5

The Commission is working to resolve interference to Terminal Doppler Weather Radar (TDWR) systems used at airports that has occurred from some outdoor wireless systems operating in the 5.4 GHz (5470 MHz - 5725 MHz) band. These wireless devices are required to implement radar detection and DFS functions when operating as a master device and are subject to Section 15.407 of our rules. We are working with the FAA and NTIA to develop long term equipment authorization test procedures that will ensure that the devices comply with our rules and also protect the TDWR operations. In the interim, the Commission will allow certification of wireless master devices with radar detection function and with DFS capability, if they meet the following conditions:

- devices are intended for indoor operations only;
- devices will not permit operations on channels which overlap the 5600 - 5650 MHz band;
- devices meet all the other requirements specified in Section 15.407 and no configuration controls are  provided to change the frequency of operations outside the grant of certification for US operation

All the devices operating in the 5.4 GHz band and subject to the DFS requirements must be submitted to the Commission's Laboratory Division for pre-grant testing and equipment authorization. The grantee must ensure that the applications subject to this interim procedure must include appropriate attestations that the device is intended for indoor use (through a clear indication in a manual or labels with the device) and must demonstrate through test reports that the transmission is disabled in the 5600 - 5650 MHz band.


内容摘要：

FCC于10月5号公告：许可5470 MHz - 5725 MHz之具有DFS功能的Marster 设备验证许可，但前提必须符合以下三个条件：

1. 设备限定于室内使用
2. 设备不得使用5600 - 5650 MHz band
3. 设备需符合Section 15.407，不得提供得以改变美国验证许可频率之外频率的配置控制

说明：

所有操作在5.4GHz的频率，具有DFS功能的Master 设备都必须递交FCC实验室进行验证发证前的测试跟设备许可。申请者在此暂时申请程序下，必须要确保提交适当的证明，说明产品仅在室内使用（在设备的说明书或名牌上清晰体现），同时必须在测试报告中呈现该产品不能在 5600 - 5650 MHz band内进行传输。


名词解释：Dynamic Frequency Selection 动态频率选择

DFS--is a mechanism that dynamically detects signals from other systems and avoids co-channel operation with these systems, notably radar systems.  
是一种机制，动态检测来自其他系统的信号，从而避免这些系统的干扰，特别是对雷达系统的干扰。