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  2. Cellular repeater - Wikipedia

    en.wikipedia.org/wiki/Cellular_repeater

    A cellular repeater (also known as cell phone signal booster or cell phone signal amplifier) is a type of bi-directional amplifier used to improve cell phone reception. [citation needed] A cellular repeater system commonly consists of a donor antenna that receives and transmits signal from nearby cell towers, coaxial cables, a signal amplifier, and an indoor rebroadcast antenna.

  3. Boost controller - Wikipedia

    en.wikipedia.org/wiki/Boost_controller

    A 3-port solenoid-type boost controller A 4-port solenoid-type boost controller (used for a dual-port wastegate). The purpose of a boost controller is to reduce the boost pressure seen by the wastegate's reference port, in order to trick the wastegate into allowing higher boost pressures than it was designed for.

  4. Mobile phone signal - Wikipedia

    en.wikipedia.org/wiki/Mobile_phone_signal

    A mobile phone signal (also known as reception and service) is the signal strength (measured in dBm) received by a mobile phone from a cellular network (on the downlink). Depending on various factors, such as proximity to a tower, any obstructions such as buildings or trees, etc. this signal strength will vary. Most mobile devices use a set of ...

  5. Signal booster - Wikipedia

    en.wikipedia.org/wiki/Signal_booster

    A signal booster is a system which increases, or appears to increase, the power of a radio signal. The term may refer to: The term may refer to: Radio repeater

  6. Signal operating instructions - Wikipedia

    en.wikipedia.org/wiki/Signal_operating_instructions

    They include current and up-to-date information covering radio call signs and frequencies, a telephone directory, code-words (for rudimentary encryption), and visual and sound signals. A designated battalion signal officer prepares the battalion SOI in conformance with the SOI of higher headquarters. [2] During operations, SOI are changed daily.

  7. Boost converter - Wikipedia

    en.wikipedia.org/wiki/Boost_converter

    A boost converter or step-up converter is a DC-to-DC converter that increases voltage, while decreasing current, from its input to its output . It is a class of switched-mode power supply (SMPS) containing at least two semiconductors, a diode and a transistor , and at least one energy storage element: a capacitor , inductor , or the two in ...

  8. Wink pulsing - Wikipedia

    en.wikipedia.org/wiki/Wink_pulsing

    Winking is a telephony signalling technique used both in connection with DC signalling on a trunk, and with indicator lamps on a key telephone.. In telephone switching systems, wink pulsing is recurring pulsing in which the off condition is relatively short compared to the on condition.