International Maritime Channel and Weather Channel
Aviation wireless intercom
Aviation radios, also called aircraft radios, are specifically used for wireless communication between the ground and aircraft, and between pilots and pilots. It is an indispensable communication tool in ensuring air flight safety and effective air traffic management. As the aerial radio is used in a special environment to ensure that the aviation working frequency is not disturbed, according to the relevant provisions of the ICAO Civil Aviation Convention, the air communication frequency range is 118.000MHz-136.975MHz at the VHF frequency level, and the channel frequency interval is divided into Third gear, 50KHZ, 25KHZ and 8.3KHZ. China stipulates a frequency interval of 25KHZ, the minimum signal spatial field strength is not less than 120DBW / M2, and the adjacent channel signal protection is greater than 60DB. The wireless communication in the VHF (Very High Frequency) frequency band is ... distance propagation, and its propagation characteristics are like light waves. There is no guarantee for communication between the air and the ground, and the diffraction phenomenon is negligible. VHF radio waves are caused by reflection and scattering in the ionosphere. The attenuation loss is smaller. At present, the vast majority of ground-air communications are voice communications, using analog signals, and the transmission mode is amplitude modulation (AM) modulation. Due to the high flying height of the aircraft, the receiving sensitivity of the walkie-talkie is also very high, the communication distance is relatively long, generally can be more than 200 kilometers, the height of the aircraft is at an altitude of 10,000 meters, and its 50W transmit power can reach 300-350 kilometers. .
Aviation wireless walkie-talkies can be divided into handheld, portable, fixed (airborne) and base based on the requirements of use. In an aerial radio, 5-10W is medium power, 1-5W is low power, 25W is high power, and 50W is super power. The functions of the aerial radio are relatively few, only the basic call function is guaranteed, and there are no more redundant functions. The display characters of the airborne intercom are large. Good backlight makes observation very easy. There are fewer knobs on the surface than conventional vehicles. A small number of knobs and control buttons are used to complete the required control functions, which is convenient for quick operation and convenient for frequency selection. High reliability, normal operation during sudden temperature changes, and simple operation are the characteristics of aviation stations, especially airborne stations. The demand for aviation stations is small, the design and manufacturing requirements are high, and its price is much higher than that of ordinary conventional aircraft. The air stations produced in Europe and America are much more expensive than those produced in Japan. For example, the same vehicle-mounted platform is usually about 2,000 yuan each, while the Japanese airborne platform is about 10,000 yuan, and the similar European aviation stations are 30,000-40,000 yuan each. And the greater the power, the greater the price difference. The domestic walkie-talkies are mainly IC-A3, A4, A22, A23, etc. produced by Japanese ICOM company, of which A23 is the current hot-selling model, while the airborne platform is mainly IC-A110, A200 and other models, A110 models Large sales. Japan Airlines walkie-talkies are not only sold well in the domestic market but also in foreign markets. The VXA-120, VX100, VX-16, and VXA-6 produced by Wetex of Japan are not sold in China, and their markets are mainly in North America and Europe. Some countries such as Europe and the United States produce more high-power models, and the aeronautical stations that have been tested and approved by the National Radio Testing Center include Harris Corporation ’s VDR-2125 (25W) and VDR-2135 (50W), and British PAE ’s 5525-DB (25W), DTR100 (50W) and DT100 (50W) of Italian OTE company, GT100 (100W) and GTR100 (100W) of Italian company (MAECONI, MOBILE, S, P, A). In addition, there are RINO110 and RINO120 aviation stations of Taiwan International Avionics Branch.
FRS Frequencies:
CH1 462.5625 MHz, CH2 462.5875 MHz
CH3 462.6125 MHz, CH4 462.6375 MHz
CH5 462.6625 MHz, CH6 462.6875 MHz
CH7 462.7125 MHz, CH8 467.5625 MHz
CH9 467.5875 MHz, CH10 467.6125 MHz
CH11 467.6375 MHz, CH12 467.6625 MHz
CH13 467.6675 MHz, CH14 467.7125 MHz
List of U / V Repeater Stations in Major Cities in the Country Province City Name Uplink Frequency Downlink Frequency Sub-Audio Opening Time Manager Beijing Beijing 0.7m Relay 434.750Mhz 439.750Mhz 88.5 24 hours Shanghai South District 0.7m Relay 434.625Mhz 439.625Mhz No 24 hours Shanghai Quyang 0.7m relay 434.650Mhz 439.650Mhz no 24 hours Shanghai Shanghai 0.7m waiting frequency 436.000Mhz 436.000Mhz no 24 hours Shanghai Shanghai 2m waiting frequency 144.900Mhz 144.900Mhz no 24 hours Jiangsu Nanjing 0.7m relay 431.875Mhz 436.875Mhz no 8 : 00-24: 00 BD4RBN
Nanjing Nanjing 0.7m relay 2 431.925Mhz 436.925Mhz without 24 hours BD4RBN
Nanjing Nanjing 2m relay 144.870Mhz 145.470Mhz without 24 hours BD4RBN
Xuzhou Xuzhou 2m relay 144.840Mhz 145.470Mhz without 24 hours Suzhou Suzhou 2m waiting frequency 144.700Mhz 144.700Mhz without 24 hours Suzhou Suzhou 0.7m relay 433.025Mhz 438.025Mhz without 24 hours Wuxi Wuxi 0.7m relay 433.550Mhz 438.550Mhz without 24 hours Yangzhou Yangzhou 2m relay 144.100Mhz 145.900Mhz no closed Changzhou Changzhou 0.7m relay 439.375Mhz 434.375Mhz no 24 hours Kunshan Kunshan 0.7m relay 433.075Mhz 438.075Mhz no 24 hours Kunshan Kunshan 2m relay 147.900Mhz 144.050Mhz no 24 hours Danyang Danyang 0.7m relay 433.075Mhz 438.075Mhz without 24 hours Danyang Danyang 2m relay 144.800Mhz 144.800Mhz without 24 hours Huaiyin Huaiyin 2m relay 144.870Mhz 145.470Mhz without 24 hours Huai'an Huai'an 2m relay 144.870Mhz 145.470Mhz without 24 hours Anhui Hefei 0.7m relay 434.750Mhz 439.750Mhz without 24 hours BD6AO
Huaibei Huaibei 0.7m relay 434.470Mhz 439.470Mhz without 24 hours Zhejiang Wenzhou 2m relay 144.025Mhz 147.975Mhz without 24 hours Ningbo Ningbo 0.7m relay 434.050Mhz 439.050Mhz without 24 hours Pinghu Pinghu 0.7m relay 430.275Mhz 435.275Mhz without 24 Hours Haining Haining 0.7m relay 438.450Mhz 433.450Mhz without 24 hours Tongxiang Tongxiang 0.7m relay 434.550Mhz 439.550Mhz 107.2 24 hours Shaoxing Shaoxing 0.7m relay 439.650Mhz 431.650Mhz without 24 hours Jiaxing Jiaxing 0.7m relay 434.390Mhz 439.390Mhz Without 24 hours Yuyao Yuyao 0.7m relay 434.550Mhz 439.550Mhz 107.2 24 hours Shandong Jinan 0.7m relay 434.750Mhz 439.750Mhz without 24 hours Jinan Jinan 0.7m relay 2 433.550Mhz 438.550Mhz without 24 hours Qingdao Qingdao waiting frequency 438.550Mhz 438.550 Mhz without 24 hours Zibo Zibo 0.7m relay 434.600Mhz 439.600Mhz without 24 hours BD4OG
Tai'an Tai'an 0.7m relay 434.750Mhz 439.750Mhz without 24 hours Taicheng Taicheng 0.7m relay 434.850Mhz 439.850Mhz without 24 hours BD4NW
Zoucheng Zoucheng 0.7m relay 434.900Mhz 439.900Mhz without 24 hours BD4JP
Xintai Xintai 0.7m relay 434.650Mhz 439.650Mhz without 24 hours Weihai Weihai 2m guard frequency 144.790Mhz 144.790Mhz without 24 hours Yantai Yantai 2m relay 144.900Mhz 147.950Mhz without 24 hours Heilongjiang Harbin 2m relay 144.150Mhz 145.850Mhz without 24 Hour Harbin Harbin 2m watch frequency 145.050Mhz 145.050Mhz no 24 hours Daqing Daqing 2m watch frequency 145.750Mhz 145.750Mhz no 24 hours Liaoning Shenyang 0.7m relay 439.500Mhz 434.500Mhz no 24 hours Shenyang Shenyang 2m watch frequency 145.050Mhz no 24 hours 50.50Mhz Dalian Dalian 2m waiting frequency 145.050Mhz 145.050Mhz without 24 hours Fushun Fushun 2m waiting frequency 144.900Mhz 144.900Mhz without 24 hours Huludao Huludao 2m waiting frequency 145.050Mhz 145.050Mhz without 24 hours Jilin Jilin 2m waiting frequency 145.775Mhz without 24 hours without 145.775Mhz Hebei Shijiazhuang 0.7m relay 430.150Mhz 439.950Mhz no 24 hours Shijiazhuang Shijiazhuang 0.7m relay 2 434.650Mhz 439.650Mhz no 24 hours Tangshan Tangshan 2m relay 144.825Mhz 145.425Mhz no 24 hours Zunhua Zunhua 2m waiting frequency 144.555Mhz 144.555Mhz Inner Mongolia Hohhot 0.7m relay 431.400Mhz 438.900Mhz 24 hours without 24 hours When Shanxi Datong 0.7m relay 431.125Mhz 439.625Mhz no 24 hours Shaanxi Xi'an waiting frequency 145.000Mhz 145.000Mhz no 24 hours Baoji Baoji 2m waiting frequency 145.150Mhz 145.150Mhz no 24 hours Chengdu Chengdu 2m waiting frequency 1 145.450Mhz 145.450Mhz no 24 hours Chengdu Chengdu 2m waiting frequency 2 145.625Mhz 145.625Mhz no 24 hours Chengdu Chengdu 2m waiting frequency 3 145.800Mhz 145.800Mhz no 24 hours Chengdu Chengdu 2m waiting frequency 4 145.900Mhz 145.900Mhz no 24 hours Chengdu Chengdu 0.7m waiting frequency 1 438.000Mhz 438.000Mhz Without 24 hours Chengdu Chengdu 0.7m waiting frequency 2 438.300Mhz 438.300Mhz Without 24 hours Chengdu Chengdu 0.7m waiting frequency 3 438.400Mhz 438.400Mhz Without 24 hours Chengdu Chengdu 0.7m waiting frequency 4 438.600Mhz 438.600Mhz without 24 hours Leshan Leshan 2m waiting frequency 144.800Mhz 144.800Mhz without 24 hours Chongqing Chongqing 0.7m relay 434.850Mhz 439.850Mhz without 24 hours Chongqing Chongqing 2m waiting frequency 144.800Mhz 144.800Mhz without 24 hours Hubei Wuhan 2m relay 144.700Mhz 145.180Mhz without 24 hours Hunan Zhuzhou 0.7m relay 430.875Mhz 439.875Mhz without 24 hours BA7AT
Jiangxi Nanchang 2m waiting frequency 144.875Mhz 144.875Mhz without 24 hours Henan Zhengzhou 0.7m relay 434.750Mhz 439.750Mhz without 24 hours Zhengzhou Zhengzhou 0.7m relay 2 459.850Mhz 451.850Mhz without 24 hours Luoyang Luoyang 0.7m relay 432.975Mhz 439.025Mhz 110.9 24 hours Pingdingshan Pingdingshan 0.7m relay 434.750Mhz 439.750Mhz no 24 hours Xinxiang Xinxiang 0.7m relay 434.550Mhz 439.550Mhz no 7: 30-23: 30
Guangdong Guangzhou 0.7m relay 434.470Mhz 439.470Mhz 88.5 24 hours Guangzhou Guangzhou backup relay 434.450Mhz 439.450Mhz no 24 hours Shenzhen Nanshan 0.7m relay 430.360Mhz 439.360Mhz 88.5 24 hours Shenzhen Futian 0.7m relay 434.360Mhz 439.360Mhz 88.5 24 Hour BA6AP
Dongguan Dongguan 0.7m relay 434.100Mhz 439.100Mhz 88.5 24 hours Dongguan Tangxia 0.7m waiting frequency 439.100Mhz 439.100Mhz no 24 hours Chaozhou Chaozhou 0.7m relay 431.475Mhz 439.475Mhz no 24 hours Chaozhou Chaozhou 2m relay 144.500Mhz 147.700Mhz no 24 hours Shunde Shunde 0.7m relay 434.600Mhz 439.600Mhz 88.5 24 hours Shunde Shunde 0.7m relay 2 434.700Mhz 439.700Mhz 88.5 24 hours BA7KW
Foshan Foshan 0.7m relay 434.680Mhz 439.680Mhz 88.5 24-hour Kaiping Kaiping 0.7m relay 434.800Mhz 439.800Mhz 88.5 24-hour Jiangmen Jiangmen 0.7m relay 434.900Mhz 439.900Mhz without 24 hours Zhuhai Zhuhai 0.7m relay 434.730Mhz 439.730Mhz 88.5 24 hours Huadu Huadu 0.7m relay 434.200Mhz 439.200Mhz without 24 hours Fujian Fuzhou 2m relay 144.100Mhz 147.900Mhz without 24 hours Zhangzhou Zhangzhou 2m relay 144.015Mhz 147.970Mhz without 24 hours Yunnan Kunming 2m waiting frequency 145.050Mhz 145.050Mhz No 24-hour Wenshan Wenshan 2m relay 147.950Mhz 144.150Mhz 88.5 24-hour Nanning Guangxi 2m relay 144.100Mhz 147.975Mhz No 24-hour BG7UG
Nanning Nanning 2m relay 2 144.475Mhz 147.975Mhz without 24 hours Nanning Nanning 0.7m relay 455.775Mhz 465.775Mhz without 24 hours BG7UG
Guilin Guilin 0.7m relay 434.630Mhz 439.625Mhz without 24 hours Liuzhou Liuzhou 2m relay 144.060Mhz 147.980Mhz without 24 hours Hainan Haikou 0.7m relay 431.675Mhz 439.675Mhz without 24 hours Hong Kong Hong Kong 0.7m relay 430.250Mhz 435.250Mhz 110.9 24 Hour Hong Kong Grand Cairn 2m Relay 145.050Mhz 145.650Mhz 110.9 24 hours VR2KP
Hong Kong Taipingshan 2m relay 145.150Mhz 145.750Mhz 110.9 24 hours VR2HKA
Hong Kong Taiping Mountain 2m Relay 2 144.975Mhz 145.575Mhz 110.9 24 hours VR2MA
Hong Kong Tai Mo Shan 2m relay 145.700Mhz 145.100Mhz 110.9 24 hours Hong Kong New Territories 2m relay 145.775Mhz 145.175Mhz 110.9 24 hours VR2UTM
Macau 2m relay 144.720Mhz 144.120Mhz 127.3 24 hours Macau Macau 2m relay 2 144.850Mhz 145.450Mhz 210.7 24 hours
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