【火腿快新闻】撕逼大战愈演愈烈丨电台频段之争何时休？40米段是重灾区
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频谱之争不是一两天的事了，每隔一段时间，IARU就要发布一份关于频率干扰的报告，这不，干扰又来了！根本停不下来！
历史推送：
【火腿快新闻】干扰、加塞儿，业余频段被侵占根本停不下来！别在频率里捣乱！都有人听着呢！
厄立特里亚广播电台（广播大众之声）和埃塞俄比亚广播电台之间的频率冲突还在继续进行，据说这是埃塞俄比亚广播电台用宽带白噪声干扰的。对于业余无线电爱好者所问题是，他们的频率之争发生在40米话音频段 （7.145和7.175 MHz）中发生，IARU 1区监视系统（IARUMS）报告的干扰信号在每个频道上为20 kHz宽。这两家电台在空中冲突已持续多年，埃塞俄比亚在2008年建造了新的发射站，据说他们使用其中的两个或三个作为干扰目的。每逢夜里，在北美可以听到干扰信号。根据IARUMS第1区协调员Wolf Hadel，DK2OM表述，厄立特里亚广播电台在每个频率上播放单独的节目。他在IARUMS 9月通讯中说，德国，奥地利和瑞士的电信监管机构已被告知，因此他们可以提出正式投诉。
在40米段的其他AM广播入侵者包括在索马里兰的7.120 MHz的Hargeisa广播，Hadel说，在澳大利亚和日本甚至可以听到。他进一步报告说，7.205 MHz的伊朗之声信号在其信道的任一侧上散射高达5 kHz，而以相同频率工作的法国国际广播电台则飞散到7.185 MHz。
40米段的其他奇怪信号包括7.091.5 MHz上的所谓“V信标”。循环CW信号，每次发送字母“V”反复发出。 Hadel说，信号源于哈萨克斯坦。
Hadel已经报告了来自俄罗斯的40和20米的HF雷达信号，具有“持久的传输，通常具有许多杂散发射。
在CW中识别为“REA4”的俄罗斯空军频移键控信号已经在7.117MHz上活动，而在14.180MHz观察到俄罗斯海军FSK信号“Sevastopol”。 Hadel说，德国的电信监管机构已经提出了正式投诉。其他俄罗斯军用信号在7.016 MHz已经听到。
中国宽带OTH雷达在14 MHz产生了一些“啄木鸟”的投诉，“但这不是俄罗斯的啄木鸟，”Hadel澄清。 Mario Taeubel，DG0JBJ，在40米处观测到11个OTH雷达，在20米处观测到11个OTH雷达，在9月观测到15个雷达，13个雷达和10米。
Hadel报告说，来自西班牙和葡萄牙，英国和爱尔兰捕鱼作业，印度尼西亚和菲律宾海盗的信号和OTH雷达信号分布在80,40,20和15米，而来自海洋传感器浮标的信号在各种离散频率在10米。
source：ARRL
英文原文
The battle continues between Radio Eritrea (Voice of the Broad Masses) and Radio Ethiopia, which is said to be jamming the Eritrean broadcaster with broadband white noise. The problem forradio amateurs
is that the battle is taking place in the 40 meter phone band — 7.145 and 7.175 MHz — with the jamming signalreported by the IARU Region 1 Monitoring System (IARUMS) to be 20 kHz wide on each channel. The on-air conflict has been going on for years; Ethiopia constructed new transmitting sites in 2008 and is said to use two or three of them for jamming purposes. The interfering signals can be heard in North America after dark. According to IARUMS Region 1 Coordinator Wolf Hadel, DK2OM, Radio Eritrea is airing separate programs on each frequency. He said in the IARUMS September newsletter that telecommunications regulators in Germany, Austria, and Switzerland have been informed, so they could file official complaints.
Other AM broadcast intruders on 40 meters include Radio Hargeisa in Somaliland on 7.120 MHz, which, Hadel said, is even audible in Australia and Japan. He further reports that the Voice of Iran’s signal on 7.205 MHz is splattering up to 5 kHz on either side of its channel, while Radio France International
, which operates on the same frequency, is splattering down to 7.185 MHz.
Other odds and ends on 40 meters include the so-called “V beacon” on 7.091.5 MHz. The looped CW signal, which sends the letter “V” over and over, is audible every day. Hadel said the signal originates in Kazakhstan.
Hadel has reported HF radar signals from Russia
on 40 and 20 meters, with “long-lasting transmissions, often with many spurious emissions.”
A Russian Air Force frequency-shift keyed signal identifying in CW as “REA4,” has been active on 7.117 MHz, while a Russian Navy FSK signal “Sevastopol” has been observed on 14.180. Hadel said Germany’s telecommunications regulator has filed an official complaint. Other Russian military signals have been heard on 7.016 MHz.
Chinese broadband OTH radars on 14 MHz generated some “Woodpecker
” complaints, “but this was not the Russian ‘Woodpecker,’” Hadel clarified. Mario Taeubel, DG0JBJ, observed 11 OTH radars on 40 meters, 40 on 20 meters, 13 on 15 meters and 2 on 10 meters during September.
Hadel reports that signals from Spanish and Portuguese, UK, and Irish fishing operations, Indonesian and Philippine pirates, and OTH radar signals are sprinkled throughout 80, 40, 20, and 15 meters, while signals from oceangoing sensor buoys are heard widely on various discrete frequencies on 10 meters.
Source:ARRL
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