The decibel range for five bars of reception is so large because precise measurement in such an area is less important than in areas with poor reception.
五格信号强度的分贝范围很大，因为在信号好的地方精确测量信号并没有在信号差地方测量那么重要。
Johnson noise is uniformly distributed over a wide frequency range, so reducing the noise bandwidth effectively decreases the noise in the measurement.
约翰逊噪声在很宽的频率范围内呈均匀分布，所以减小噪声带宽能够有效地降低测量中的噪声。
Initial value measurement of antenna delay is very important in range system.
在测距系统中，天线时延初值的测量是很重要的。
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