| 1. | Nov . 13 , opening of new york - boston radio relay system for experimental service
11月13日，纽约至波士顿的无线电中继系统试验性开通。 |
| 2. | Methods of measurement for equipment used in terrestrial radio - relay systems ; part 3 : simulated systems iec 60487 - 3 : 1975 ; german version hd 477 . 3 s1 : 1988
地面无线电中继系统设备的测量方法.第3部分:模拟系统 |
| 3. | Methods of measurement for equipment used in terrestrial radio - relay system ; measurements for sub - systems ; general ; identique with iec 487 - 2 - 1 , edition 1981
地面无线电中继系统设备测量方法.第2部分:分系统测量 |
| 4. | Methods of measurement for equipment used in terrestrial radio - relay systems ; measurements for sub - systems ; radioreceivers ; identical with iec 60487 - 2 - 8 : 1986
地面无线电中继系统设备的测量方法.第2部分:分系统测 |
| 5. | Methods of measurement for equipment used in terrestrial radio - relay systems ; simulated systems ; measurement in the baseband ; identical with iec 60487 - 3 - 2 : 1981
地面无线电中继系统设备测量方法.第3部分:仿真系统 |
| 6. | Methods of measurement for equipment used in terrestrial radio - relay systems ; measurements for sub - systems ; radio transmitters ; identical with iec 60487 - 2 - 7 : 1986
地面无线电中继系统设备的测量方法.第2部分:分系统测 |
| 7. | Methods of measurement for equipment used in digital microwave radio transmission systems - measurements on terrestrial radio - relay systems - antenna
数字微波无线电发射系统设备测量方法.地面无线电中继系统测量.天线 |
| 8. | Methods of measurement for equipment used in terristrial radio - relay systems ; measurement for sub - systems ; r . f . branching network ; identical with iec 60487 - 2 - 3 : 1984
地面无线电中继系统设备测量方法.第2部分:分系统测量 |
| 9. | Methods of measurement for equipment used in terrestrial radio - relay systems ; measurements for sub - systems ; frequency demodulators ; identical with iec 60487 - 2 - 5 : 1984
地面无线电中继系统设备的测量方法.第2部分:分系统测 |
| 10. | Methods of measurement for equipment used in digital microwave radio transmission systems - measurements on terrestrial radio - relay systems - general
数字微波无线电发射系统设备测量方法.地面无线电中继系统测量方法.总则 |
