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2. RF modulator - Wikipedia

   en.wikipedia.org/wiki/RF_modulator

   The modulator is then programmed to broadcast the signals on a certain frequency. That RF broadcast is then received by the connected TV. When the TV is tuned to the programmed channel, the video and audio signal of the source device is accessed. RF modulation can become difficult in a CATV system. High pass, low pass, and notch filters must be ...

3. 8VSB - Wikipedia

   en.wikipedia.org/wiki/8VSB

   A modulation method specifies how the radio signal fluctuates to convey information. ATSC and DVB-T specify the modulation used for over-the-air digital television; by comparison, QAM is the modulation method used for cable. The specifications for a cable-ready television, then, might state that it supports 8VSB (for broadcast TV) and QAM (for ...

4. Video modulation - Wikipedia

   en.wikipedia.org/wiki/Video_modulation

   Video signals are usually encoded into binary digit (0, 1) or seven digit pulse-code modulation (PCM), which is a method used to digitally represent original video signal. . The video signal converted to binary digit PCM at the point of origin can be then transmitted over existing telephone cable or wire directly to the destination

5. Modulation - Wikipedia

   en.wikipedia.org/wiki/Modulation

   The resulting so called equivalent lowpass signal or equivalent baseband signal is a complex-valued representation of the real-valued modulated physical signal (the so-called passband signal or RF signal). These are the general steps used by the modulator to transmit data:

6. Frequency modulation - Wikipedia

   en.wikipedia.org/wiki/Frequency_modulation

   where =, being the sensitivity of the frequency modulator and being the amplitude of the modulating signal or baseband signal. In this equation, f ( τ ) {\displaystyle f(\tau )\,} is the instantaneous frequency of the oscillator and f Δ {\displaystyle f_{\Delta }\,} is the frequency deviation , which represents the maximum shift away from f c ...

7. Composite video - Wikipedia

   en.wikipedia.org/wiki/Composite_video

   This may then be converted to FM RF with an RF modulator that generates the proper carrier (often for channel 3 or 4 in North America, channel 36 in Europe). Sometimes this modulator is built into the product (such as video game consoles, VCRs, or the Atari , Commodore 64 , or TRS-80 CoCo home-computers), is an external unit powered by the ...