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The history of continous modulation

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by this Author/Contributor:

  1. Boris P. Khromoy

on this subject:

  1. Each Other. On The Receiving End Of The Communication Line Should Be The Recovery Process The Control Signal, I.E. The Reverse Process Of Modulation. This Process Of Allocation Information Of The Received Modulated Waves Have Been Called Demodulation, Or Detection Of Vibrations. Thus, Modulation Is Performed On The Transmitting End And Demodulation At The Receiving End. When Broadcasting, Transmitting Radio Microphone Signal Modulates A Carrier Oscillation, Whose Frequency Allocated To This Station, And All Radio Receivers Configured To Receive A Given Station, The Process Of Demodulation (Detection) And After Amplification The Signal Is Reproduced By The Loudspeaker. Such Separation Devices, Modulation And Detection Took Place In The Development Of Communications Until The Connection Is Carried Out In One Direction &#8211
  2. Frequency. As A Result Of The Modulation Range Low Frequency Control Signal Is Transferred In The High-Frequency Range. It Allows Broadcasting Organizations To Customize Operation Of The Transceiver To Different Frequencies So That They Do Not "Interfere&quot
  3. Comes From The Latin Word "Modulatio&quot
  4. From Source To Consumer. With The Development Of Computer Technology And The Widespread Use Of The Internet Communication Has Become Two-Way. The Consumer Not Only Receives Information From The Internet To Your Computer, But Also Transmits Your Information To The Internet. For This Reason, It Needs To Have A Device Performing Both Operations: Modulation And Demodulation. This Device Is Called A "Modem". The Number Of Types Of Modems Used In Practice Is Very Large. A Natural Question Arises: "Why Do We Need So Many?".To Answer This Question Is Not Simple. For This It Is Necessary To Consider The Transmission Characteristics Of The Modulated Signals, Including Noise Immunity, Wide Spectrum, Sensitivity To Distortion In The Channel, Etc. The Author Gives Information About The History Of Amwith Regard To The Transmission Of Telephony Signals, Broadcasting, Black-And-White Television, Color Television Secam And Quadrature Amplitude Modulation (Qam) To Ntsс.
  5. The Term "Modulation&quot

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