Across
- 3. TV is a pay TV service that sends out signals not over the air, but through cable that runs from the cable company to the viewer’s home. Many cable types, from copper to fiber optic cables, are used. The signal can be analog or digital.
- 8. high frequencies) are channels that usually include channels 14 to 83.
- 9. Source can be defined as the program. It can be a movie, TV show, news program, etc. It is just the source’s video and does not include the sound.
- 11. Waves the radio frequencies used for broadcasting.
- 13. TV is usually a digital TV signal that is broadcast from a satellite orbiting the earth. They are usually pay services that require special equipment to receive programming and operate on special frequencies.
- 15. Modulation carrier frequencies are in the frequency band range 88 to 108 MHz
- 18. Modulation carrier frequencies are in the frequency range 535-1605 kHz.
- 19. Device as the technology to turn the electrical signals received into visible light. On a standard TV set, this includes the CRT (Cathode Ray Tube) technology.
Down
- 1. is what sends both audio and video signals over the air waves.
- 2. receives the transmitted signals (TV programs) and turns radio waves, which include audio and video signals, into useful signals that can be processed into an image and sound.
- 4. TV is when audio and video signals are transmitted over the air waves from a ground based transmitter. These signals are usually picked up for free and are on specific frequency spectra.
- 5. Sequential Color and Memory
- 6. Device are usually speakers that are either built into the TV set or that accompany the TV set and turn electrical signals into sound waves to play audio along with the video images.
- 7. (very high frequencies) are channels that usually include channels 2 to 13
- 10. Phase Alternate Line
- 12. National Television Standards Committee
- 14. is the distribution of audio or video content to a dispersed audience via any electronic mass communications medium, but typically one using the electromagnetic spectrum (radio waves), in a one-to-many model.
- 16. Terrestrial TV is a technology for terrestrial television in which land-based (terrestrial) television stations broadcast television content by radio waves to televisions in consumers' residences in a digital format.
- 17. a range of frequencies within a given band, in particular that used for transmitting a signal.
- 20. Source is the TV program’s audio signal, whether coming from a movie, TV show, news program, etc. It can come in the form of mono, stereo, or even digitally processed surround sound.