band-pass tuning 带通调谐
The author's solution to this problem is to use a tuneable RF preamplifier which also acts as a low pass filter when tuning the low end of the 88-108 MHz band where most of the exotic channels lie.
作者的解决这个问题是使用可调谐射频前置放大器这也渠道作为一个低通滤波器调谐88-108兆赫时，低端的带异国情调的地方大部分的谎言。
It took only 20 days to pass the tests and the vehicle even managed without the usual in such cases fine-tuning.
试飞只用了20天，且没有进行常规的细微调整。
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