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2. RF modulator - Wikipedia

   en.wikipedia.org/wiki/RF_modulator

   Cable TV Agile Modulator. RF modulators are commonly integrated into VCRs, in video game consoles up to and including the fourth generation, and in 8- and 16-bit home computers. Some systems were supplied with an external modulator unit that connected to both the system and to the antenna jacks of a television.

3. 8VSB - Wikipedia

   en.wikipedia.org/wiki/8VSB

   8VSB. 8VSB is the modulation method used for broadcast in the ATSC digital television standard. ATSC and 8VSB modulation is used primarily in North America; in contrast, the DVB-T standard uses COFDM . A modulation method specifies how the radio signal fluctuates to convey information. ATSC and DVB-T specify the modulation used for over-the-air ...

4. QAM (television) - Wikipedia

   en.wikipedia.org/wiki/QAM_(television)

   QAM (television) QAM is a digital television standard using quadrature amplitude modulation. It is the format by which digital cable channels are encoded and transmitted via cable television providers. QAM is used in a variety of communications systems such as Dial-up modems and WiFi. In cable systems, a QAM tuner is linked to the cable in a ...

5. Quadrature amplitude modulation - Wikipedia

   en.wikipedia.org/wiki/Quadrature_amplitude...

   Quadrature amplitude modulation ( QAM) is the name of a family of digital modulation methods and a related family of analog modulation methods widely used in modern telecommunications to transmit information. It conveys two analog message signals, or two digital bit streams, by changing ( modulating) the amplitudes of two carrier waves, using ...

6. Cable television headend - Wikipedia

   en.wikipedia.org/wiki/Cable_television_headend

   Analog terrestrial TV signals require a processor which is a RF receiver that outputs video and audio. In some cases the processor will include a built-in modulator. Digital terrestrial TV signals require a special digital processor. Digital channels are usually received on an L band QAM stream from a satellite, which uses multiplexing. Using ...

7. Modulation - Wikipedia

   en.wikipedia.org/wiki/Modulation

   In electronics and telecommunications, modulation is the process of varying one or more properties of a periodic waveform, called the carrier signal, with a separate signal called the modulation signal that typically contains information to be transmitted. [ 1] For example, the modulation signal might be an audio signal representing sound from ...