MMDVM热点板固件更新MMDVM_HS v1.4.12,限制使用国际业余卫星专用频率

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标题:MMDVM热点板固件更新MMDVM_HS v1.4.12,限制使用国际业余卫星专用频率



Frequency restrictions to avoid satellite interference. Please avoid the following ranges: 145.8-146.0 MHz and 435-438 MHz, otherwise firmware will not start. Please see:




This week, AMSAT News Service (ANS) cited an August 27 report from AMSAT Vice President-Operations Drew Glasbrenner, KO4MA, saying that a digital mobile radio (DMR) signal has been interfering with the AO-92 (Fox-1D) satellite’s 435.35 MHz uplink frequency. Glasbrenner said hotspots, repeaters, terrestrial simplex, and “anything not satellite” should never transmit in the segments 145.8 – 146.0 MHz or 435 – 438 MHz by international band plan. Well-known satellite enthusiast Patrick Stoddard, WD9EWK/VA7EWK, told ARRL that one DMR hotspot operating on the AO-92 uplink frequency in the St. Louis area has shifted to another frequency. But, he added, “I think there are still issues, since not all hotspots will report their frequencies and positions to websites such as BrandMeister or via APRS, where they appear on other sites such as”

本周,AMSAT新闻服务(ANS)援引了AMSAT副总裁Dr.Glasbrenner,KO4MA8月27日的报告,称数字移动无线电(DMR)信号已经干扰了AO-92(Fox-1D)卫星的435.35MHz上行频率。格拉斯布伦纳说,国际频带计划中,热点、中继器、地面单形和“任何不是卫星的东西”绝不应该在145.8-146.0MHz或435-438MHz的频段内传输。著名的卫星爱好者Patrick Stoddard,WD9EWK/VA7EWK,告诉ARRL,在圣路易斯地区的AO-92上行频率上运行的一个DMR热点已经转移到另一个频率。但是,他补充说,“我认为仍然存在问题,因为并非所有热点都会向BrandMeister等网站或APRS报告它们的频率和位置,这些网站也会出现在其他网站上,比如。”

“There are others surely operating near satellite uplinks,” Stoddard added. “For many, the 435 – 438 MHz satellite subband is a big piece of quiet real estate in a busy part of the 70-centimeter band for weak-signal work, repeater links, amateur TV, and other possible uses.”


Stoddard points out that FCC Part 97 addresses Amateur Radio operation in these segments, although regulations in many other countries may not be as detailed. §97.3(a)(7) defines Auxiliary Stations as, “an amateur station, other than in a message forwarding system, that is transmitting communications point-to-point within a system of cooperating amateur stations.”


Stoddard said this would include remote bases, EchoLink and IRLP nodes, and hotspots used for digital voice modes, as well as stations using these hotspots and nodes. Auxiliary stations may not transmit in the 145.8 – 146.0 and 435 – 438 MHz satellite subbands (among others in the 2-meter and 70-centimeter amateur bands), per §97.201(b).





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