区别在于频谱分析仪被设计成是实验室使用，设计成是带有很大可调范围和带宽等并覆盖非常大频率范围的仪器。
The essential difference is that the spectrum analyzer, being designed for laboratory use, is designed to cover an extremely wide frequency range with widely adjustable tuning range, bandwidth, etc.
通过对地面卫星信号覆盖区内的多普勒频率偏移及不确定性范围的计算，给出了卫星导航系统信号的多普勒频率偏移与接收机位置之间的关系。
By calculating the Doppler shift and its uncertainty in the signal covering area, the relation between Doppler shift and the position of the receiver is obtained.
探讨了系统容量、组网、覆盖范围、链路预测和频率规划等内容。
The capacity, network organizing, coverage, link budget and frequency planning are discussed.
单个天线的工作频带覆盖了例如由无线电系统所使用的频率范围或者只是该频率范围内的发射频带或接收频带。
The operating band of an individual antenna covers e. g. the frequency range used by a radio system or only the transmitting or receiving band in that range.
它能产生所有频率的声音，覆盖了整个人类的听力范围。
The unit generates noise at all frequencies across the human hearing range.
正弦波输出，失真小，稳定性好，频率范围覆盖整个音频范围。
Sine wave output, low distortion and high stability, frequency range over with whole audio range.
正弦波输出，失真小，稳定性好，频率范围覆盖整个音频范围。
Sine wave output, low distortion and high stability, frequency range over with whole audio range.
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