Signal level：信号质量在802.11标准中有非常简单的定义，相当于术语“PN码相关强度”，它是对传入DSSS（直序扩频）信号和理想DSSS信号之间的匹配(相关性)的度量。

So, what is signal level? It’s the power of a signal, stated in dBmV, which is technically a unit of power expressed in terms of voltage. Measuring signal level in a cable network is relatively straightforward, and modern test equipment simplifies the task of accurate measurement of analog TV signals, SC-QAM signals, and even OFDM signals.

The definition of “ signal level ” of a digital signal is the level, expressed in dBmV, at which a sine wave would produce the same heating in a resistor as does the signal being measured. In other words, the level of a digital signal is taken to be the average power.

2016年5月13日 · RSSI（Received Signal Strength Indicator，接收信号强度指示）是一个测量无线信号强度的指标，用于评估通信质量或信号覆盖范围。 在 WiFi 环境中，RSSI值通常表示为负值，值越小表示 信号 越强。

一、信噪比（SNR：Signal to Noise Ratio） 指在规定输入电压下的输出信号电压与输入电压切断时，输出所残留之杂音电压之比，也可看成是最大不失真声音信号强度与同时发出的噪音强度之间的比率，通常以S/N表示。

2023年10月9日 · The signal level is the strength of your Wi-Fi signal. The Signal visualization is provided to give you a better understanding of your Signal-to-Noise Ratio (SNR). Viewing the Signal and Noise separately can help to identify underlying problems …

2021年1月15日 · SNR （Signal to Noise Ratio，信噪比 ）指 在规定输入电压下的输出信号电压与输入电压切断时，输出所残留之杂音电压之比，也可看成是最大不失真声音信号强度与同时发出的噪音强度之间的比率，通常以 S/N表示。一般用分贝(decibels)（dB）为单位，信噪比越高表示 ...

Line level is the specified strength of an audio signal used to transmit analog sound between audio components such as CD and DVD players, television sets, audio amplifiers, and mixing consoles. Generally, line level signals sit in the middle …

As just discussed, the level of an analog TV signal is the PEP of its visual carrier. When measuring the level of a quadrature amplitude modulation (QAM) signal, we measure that signal’s aver- age power (not its PEP), also called digital channel power or digital signal power.

In telecommunications, [1] particularly in radio frequency engineering, signal strength refers to the transmitter power output as received by a reference antenna at a distance from the transmitting antenna. High-powered transmissions, such as those used in broadcasting, are expressed in dB-millivolts per metre (dBmV/m).