Make use of the article to answer the questions.

Cable television is a system of delivering television programming to paying subscribers via radio frequency (RF) signals transmitted through coaxial cables, or in more recent systems, light pulses through fiber-optic cables. This contrasts with broadcast television, in which the television signal is transmitted over the air by radio waves and received by a television antenna attached to the television. FM radio programming, high-speed Internet, telephone services, and similar non-television services may also be provided through these cables. Analog television was standard in the 20th century, but since the 2000s, cable systems have been upgraded to digital cable operation. 

A "cable channel" (sometimes known as a "cable network") is a television network available via cable television. When available through satellite television, including direct broadcast satellite providers such as DirecTV, Dish Network and BSkyB, as well as via IPTV providers such as Verizon FIOS and AT&T U-verse is referred to as a "satellite channel". Alternative terms include "non-broadcast channel" or "programming service", the latter being mainly used in legal contexts. Examples of cable/satellite channels/cable networks available in many countries are HBO, MTV, Cartoon Network, E!, Eurosport and CNN International. 

The abbreviation CATV is often used for cable television. It originally stood for "Community Access Television" or "Community Antenna Television", from cable television's origins in 1948. In areas where over-the-air TV reception was limited by distance from transmitters or mountainous terrain, large "community antennas" were constructed, and cable was run from them to individual homes. The origins of cable "broadcasting" for radio are even older as radio programming was distributed by cable in some European cities as far back as 1924.

1. What signals are used for cable tv?
2. What CATV stands for?
3. Is there any other?
4. From when?
5. Which year?
6. What is the other name for cable channel?
7. What is used for its transmission?
8. Are there any other methods?
9. How broadcast TV is transmitted?
10. via what?
11. Name one service that use same method?
12. When analog tv was a standard?
13. When cable took that spot?
14. Name one cable service provider?
15. Name one satellite service provider?
16. Name one cable channel?
17. What was used in mountainous area?
18. What connected them to homes?
19. Are cable for radio precede cable tv?
20. Did European cities have cable radio?

Numbered answers:
1. radio frequency
2. Community Antenna Television
3. Community Access Television
4. cable television's origins
5. 1948
6. a cable network
7. coaxial cables
8. cable television
9. radio waves
10. a television antenna
11. FM radio programming
12. in the 20th century
13. since the 2000s
14. DirecTV
15. Dish Network
16. MTV
17. large "community antennas"
18. cable
19. unknown
20. yes