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  2. SMATV - Wikipedia

    en.wikipedia.org/wiki/SMATV

    The system consists of a master antenna and a matching transformer to match the balanced antenna with unbalanced cable and amplifiers. [5] Most antennas have an impedance of around 300 Ω. To convert it to 75 Ω, a matching transformer (or balun) is used. For trunk line isolation, a resistive inductive device known as a splitter is used.

  3. Amateur television - Wikipedia

    en.wikipedia.org/wiki/Amateur_television

    The 2-meter band (144-148 MHz) lies within cable channel 18, but at 4 MHz wide, it is too narrow to fit the full 6 MHz bandwidth of an NTSC analog channel; its audio carrier lies outside the band. To be used as a television frequency, some narrow-bandwidth format incompatible with most televisions must be used and converted.

  4. Sector antenna - Wikipedia

    en.wikipedia.org/wiki/Sector_antenna

    Typical GSM sector antenna outdoor unit. A sector antenna is a type of directional microwave antenna with a sector-shaped radiation pattern.The word "sector" is used in the geometric sense; some portion of the circumference of a circle measured in degrees of arc. 60°, 90° and 120° designs are typical, often with a few degrees 'extra' to ensure overlap and mounted in multiples when wider or ...

  5. Fisher Electronics - Wikipedia

    en.wikipedia.org/wiki/Fisher_Electronics

    Fisher Electronics was an American audio equipment manufacturer founded in 1945 by Avery Fisher in New York City, New York. Originally named the Fisher Radio Corporation, the company is considered a pioneer in high fidelity audio equipment.

  6. ATSC tuner - Wikipedia

    en.wikipedia.org/wiki/ATSC_tuner

    If the auto scan does not pick up the signal and the tuner has manual frequency scan capability try to get the actual frequency from the station engineer. This may allow one to stay on one frequency (channel) versus "scanning" (moving too quickly through) and allow one to make antenna adjustments while observing only a problematic channel.

  7. Transmitter - Wikipedia

    en.wikipedia.org/wiki/Transmitter

    Commercial FM broadcasting transmitter at radio station WDET-FM, Wayne State University, Detroit, US.It broadcasts at 101.9 MHz with a radiated power of 48 kW.. In electronics and telecommunications, a radio transmitter or just transmitter (often abbreviated as XMTR or TX in technical documents) is an electronic device which produces radio waves with an antenna with the purpose of signal ...

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