Overview of WIFI Radio Frequency Related Indicators

The wireless radio frequency indicators mainly include the following points:
1. Transmitting power
2. Error vector amplitude (EVM)
3. Frequency error
4. Frequency offset template for transmitting signals
5. Spectrum flatness
6. Receiving sensitivity
The transmission power refers to the working power of the wireless product’s transmission antenna, in dBm. The power of wireless transmission determines the strength and distance of the wireless signal, and the higher the power, the stronger the signal.
Error Vector Magnitude (EVM) is an indicator that considers the quality of modulated signals, measured in dB. The smaller the EVM, the better the signal quality. The frequency offset template of the transmitted signal can measure the quality of the transmitted signal and its ability to suppress interference on adjacent channels.
The smaller the spectrum template and the farther the standard template line, the better its performance under the condition that the transmission power meets. And reception sensitivity: a parameter that characterizes the reception performance of the tested object. The better the reception sensitivity, the more useful signals it receives, and the larger its wireless coverage range.

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