METHODS OF MEASUREMENT FOR EQUIPMENT USED IN DIGITAL MICROWAVE RADIO TRANSMISSION SYSTEMS. PART 2: MEASUREMENTS ON TERRESTRIAL RADIO-RELAY SYSTEMS. SECTION 6: PROTECTION SWITCHING. (IEC 835-2-6:1995).
数字微波无线电传输系统所用设备的测量方法 第2部分:地面无线电中继系统的测量 第6节:保护切换 (IEC 835-2-6-1995)