电视机ERP测试方法
请问电视机测ERP(No.642 2009)on mode的时候声音信号该加多大？测试方法62087 是这么描述的，请问一下各位大侠，这段话该怎么理解？具体怎么实现
In the case that the television set is being tested with an analogue terrestrial RF input signal,
the signals used shall conform to IEC 60107-1:1997, 3.3, and shall have the input signal level
set at –39 dB(mW) when terminated with a 75 Ω resistor or at a level to provide a perceptually
noise free or error free picture.
NOTE –39 dB(mW) corresponds to 70 dB(μV).
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