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  2. Countersurveillance - Wikipedia

    en.wikipedia.org/wiki/Countersurveillance

    GSM detection equipment; WiFi and broadband detection equipment; Lens detectors to detect the lenses of wired or wireless concealed covert cameras. Multimeters for general measurements of power supplies and device components. Nonlinear junction detector (NLJD) to detect components associated with hidden eavesdropping devices.

  3. The Best Radio Frequency Detectors to Buy Right Now - AOL

    www.aol.com/news/best-radio-frequency-detectors...

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  4. Personal RF safety monitor - Wikipedia

    en.wikipedia.org/wiki/Personal_RF_safety_monitor

    The specifications of a RF monitor determines the work environment where could be applicable. Wideband RF monitors can be used at a broader variety of base station sites than for example a narrowband, cellular RF monitor which is designed only to be used in the mobile telephone- and data networks. IEEE Std C95.3 states that "In the region ...

  5. Covert listening device - Wikipedia

    en.wikipedia.org/wiki/Covert_listening_device

    The Great Seal bug was hidden in a copy of the Great Seal of the United States, presented by the Soviet Union to the United States ambassador in Moscow in 1946 and only discovered in 1952. The bug was unusual in that it had no power source or active components, making it much harder to detect—it was a new type of device, called a passive ...

  6. Electro-optical sensor - Wikipedia

    en.wikipedia.org/wiki/Electro-optical_sensor

    Electro-optical sensors are electronic detectors that convert light, or a change in light, into an electronic signal. These sensors are able to detect electromagnetic radiation from the infrared down to the ultraviolet wavelengths. [ 1 ]

  7. RF probe - Wikipedia

    en.wikipedia.org/wiki/RF_probe

    RF probes are especially relevant for switches and RF traces in printed circuit boards as well as terminations of RF components. In such systems, like many other RF circuits, there is a higher requirement of matching probe impedance with that of the DUT. Efficient matching avoids reflection which in turn leads to efficient power transfer.

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