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  2. Reorder tone - Wikipedia

    en.wikipedia.org/wiki/Reorder_tone

    The signal is used to indicate that the destination is unreachable, either because all circuits (trunks) are busy, the called number is out of service, ...

  3. Radio repeater - Wikipedia

    en.wikipedia.org/wiki/Radio_repeater

    A radio repeater is a combination of a radio receiver and a radio transmitter that receives a signal and retransmits it, so that two-way radio signals can cover longer distances. A repeater sited at a high elevation can allow two mobile stations, otherwise out of line-of-sight propagation range of each other, to communicate. [ 1 ]

  4. Repeater - Wikipedia

    en.wikipedia.org/wiki/Repeater

    Similarly, the greater the distance between a radio station and a receiver, the weaker the radio signal, and the poorer the reception. A repeater is an electronic device in a communication channel that increases the power of a signal and retransmits it, allowing it to travel further. Since it amplifies the signal, it requires a source of ...

  5. Skip (audio playback) - Wikipedia

    en.wikipedia.org/wiki/Skip_(audio_playback)

    Repeat the previous block of audio; Skip the faulty block; Try and retry to read it, causing a stopping and starting of the music; A player may utilise one or more of these techniques, depending on how faulty the data is. In the case of severe, irrecoverable damage to the data, the player may try to rescan the disc to relocate its position.

  6. Pulse-repetition frequency - Wikipedia

    en.wikipedia.org/wiki/Pulse-repetition_frequency

    The pulse-repetition frequency (PRF) is the number of pulses of a repeating signal in a specific time unit. The term is used within a number of technical disciplines, notably radar. In radar, a radio signal of a particular carrier frequency is turned on and off; the term "frequency" refers to the carrier, while the PRF refers to the number of ...

  7. Chirp - Wikipedia

    en.wikipedia.org/wiki/Chirp

    A chirp is a signal in which the frequency increases (up-chirp) or decreases (down-chirp) with time. In some sources, the term chirp is used interchangeably with sweep signal. [1] It is commonly applied to sonar, radar, and laser systems, and to other applications, such as in spread-spectrum communications (see chirp spread spectrum). This ...

  8. Broadcast relay station - Wikipedia

    en.wikipedia.org/wiki/Broadcast_relay_station

    NHK digital television, KRY, TYS and YAB transmitter in Iwakuni. A broadcast relay station, also known as a satellite station, relay transmitter, broadcast translator (U.S.), re-broadcaster (Canada), repeater (two-way radio) or complementary station (Mexico), is a broadcast transmitter which repeats (or transponds) the signal of a radio or television station to an area not covered by the ...

  9. 44,100 Hz - Wikipedia

    en.wikipedia.org/wiki/44,100_Hz

    The Nyquist–Shannon sampling theorem states that a sampling rate of more than twice the maximum frequency of the signal to be recorded is needed, resulting in a required rate of greater than 40 kHz. The exact sampling rate of 44.1 kHz was inherited from PCM adaptors which was the most affordable way to transfer data from the recording studio ...