Board level signal integrity analysis using IBIS model is a kind of simple and easy method.

利用IBIS模型进行板级信号完整性分析是一种简单、易用的分析方法。

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At last, correction method of low level signal measurement is discussed duo to effect of spectrum analyzer floor noise.

最后，讨论了频谱仪本地噪声对低电平信号测量影响的修正方法。

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Improving measurement accuracy of low level signal is studied using RF attenuation, resolution bandwidth, video bandwidth, and video average.

研究了利用频谱仪射频衰减、分辨带宽、视频带宽和视频平均的方法，提高和改善低电平信号的测量精度。

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If the temperature drops below a certain level it sends a signal, 'turn on the heat', and that signal stays on until it gets a negative signal to turn off.

如果温度降到一定程度以下时,探测器会发送一个信号,打开加热器,直到加热器再收到关闭的信号,它就会一直开着

耶鲁公开课 - 生物医学工程探索课程节选

The software covers text and icons including audio descriptions of the battery level and network signal.

BBC: Samsung struggles to block iPhone function for the blind

If you happen to come back into a 4G area (signal level above the 3G value), it switches modes again taking another 30 seconds to establish an active link.

FORBES: The Limits of 4G Connectivity

Meanwhile, on the state and local level, several developments signal a possible shift among mayors, governors and state legislatures toward energy policies that focus more on renewable fuels and conservation measures.

CNN: Have we reached the energy tipping point?