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How to detect the effective shielding range of the mobile phone signal jammer in the examination room? | #jammer

How to detect the effective shielding range of the mobile phone signal jammer in the examination room?

How to detect the effective shielding range of the mobile phone signal jammer in the examination room?

Among them, the simplest and most effective method is to directly test the power, shielding range and other data of the signal jammer in the examination room through the spectrum analyzer.