一个不懂dx的又来谈什么dx的定义。
欧洲再小，国与国之间的通讯也是dx通讯。
俄罗斯再大，美国再大，中国再大，国内的通讯也不能称为dx通讯。
好好看看下面两段吧：
although the classic definition of dx is "distance", today it generally means contacting amateur radio stations in far-away places. on the hf (also known as shortwave) bands, dx stations are those in foreign countries. on the vhf/uhf bands, dx stations can be within the same country or continent, since making a long-distance vhf contact, without the help of a satellite, can be very difficult.
for award purposes, other areas than just political countries can be classified as "dx countries". for example, the french protectorate of reunion island in the indian ocean is counted as a dx country, even though it is a department of france. the rules for determining what is a dx country can be quite complex and to avoid potential confusion, radio amateurs often use the term entity instead of country. in addition to entities, some awards are based on island groups in the world's oceans. on the vhf/uhf bands, many radio amateurs pursue awards based on maidenhead grid locators.
for the most rare locations, dx-peditions are often organized to allow radio amateurs to "work a new one".
there are frequent contests where radio amateurs operate their stations on certain dates for a fixed period of time to try to communicate with as many dx stations as possible.
in addition, many clubs offer awards for communicating with a certain number of dx stations. for example, the arrl offers the dx century club award, or dxcc. the basic certificate is awarded for working and confirming at least 100 entities on the arrl dxcc list.
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"dx" has a more specific meaning to amateur (ham) radio operators. to them, dx literally refers to amateur radio transmissions from foreign countries.
