If the calibration is carried out for the first time, you should check that when you change the frequency range is not changed.
如果校准进行了第一次了，你应该检查，当您更改的频率范围是没有改变。
If the calibration is carried out for the first time, you should check that when you change the frequency range is not changed.
如果校准进行了第一次了，你应该检查，当您更改的频率范围是没有改变。
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