Previous amateur radio experiments from the space shuttle used 2 meter FM as the communications Dnk. Advancingto UHF fast scan television is a much more challenging endeavor reqoiring from 35-50 dB of extra ERP to overcomethe higher path losses and wider bandwidths. FM television can provide excellent television pictores at very modestcarrier to noise levels. However; FM television also requires wider bandwidths, higher path losses, increased equipmentcomplexity, and more stringent high power transmitting equipment; than the more common AM television onthe 70 em band.
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机译：以前的业余无线电实验，使用2米FM作为通信DNK。前进到UHF快速扫描电视是一个更具挑战性的努力，从35-50 dB额外的ERP克服较高的路径损耗和更宽的带宽。 FM Television可以在非常适度的情况下提供优秀的电视皮载体到噪声水平。然而; FM电视还需要更宽的带宽，较高的路径损耗，增加设备复杂性，更严格的高功率传输设备;比越常见的AM电视70个EM乐队。
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