Industry Overviews:
| Head End System | Set Top Box Operation | Cable Modem System | LMDS Radio |
Quick start terms and definitions
Online CATV Dictionary
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| Cover | Description | ||||
| Introduction
to Cable Television 2nd Edition. | |||||
| Format | Pages | Price | |||
| Book | 64 | $14.99 | |||
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Industry leader and expert Lawrence Harte ensured this dictionary is unbiased and includes the latest information related the CATV industry.
This figure shows a diagram of a simple head-end system. This diagram shows that the head-end allows the selection of multiple video sources. Some of these video sources are scrambled to prevent unauthorized viewing before being sent to the cable distribution system. The video signals are supplied to video modulators that convert the low frequency video signals into their radio frequency television channel. The output of each modulator is combined and connected to the distribution trunk.
This figure shows a block diagram of a video set-top box. This device converts incoming RF channels into a lower frequency that can be provided to a television. This diagram shows an analog setup box usually involves the conversion of the incoming RF channel frequency to channel 3 or channel 4. The conversion of a digital cable channel is more complex as it requires demodulation, decoding (data decompression), and RF modulation back to a form suitable for a television. Optionally, a digital decryption section and/or video descrambling section may be included.
This figure shows a basic cable modem system that consists of a head end (television receivers and cable modem system), distribution lines with amplifiers, and cable modems that connect to customers' computers. This diagram shows that the cable television operator's head end system contains both analog and digital television channel transmitters that are connected to customers through the distribution lines. The distribution lines (fiber and/or coaxial cable) carry over 100 television RF channels. Some of the upper television RF channels are used for digital broadcast channels that transmit data to customers and the lower frequency channels are used to transmit digital information from the customer to the cable operator. Each of the upper digital channels can transfer 30 to 40 Mbps and each of the lower digital channels can transfer data at approximately 2 Mbps. The cable operator has replaced its one-way distribution amplifiers with precision (linear) high frequency bi-directional (two-way) amplifiers. Each high-speed Internet customer has a cable modem that can communicate with the cable modem termination system (CMTS) modem at the head end of the system where the CMTS system is connected to the Internet.
This figure shows a LMDS system. This diagram shows that the major component of a wireless cable system is the head-end equipment. The head-end equipment is equivalent to a telephone central office. The head-end building has a satellite connection for cable channels and video players for video on demand. The head-end is linked to base stations (BS) which transmits radio frequency signals for reception. An antenna and receiver in the home converts the microwave radio signals into the standard television channels for use in the home. As in traditional cable systems, a set-top box decodes the signal for input to the television. Low frequency wireless cable systems such as MMDS wireless cable systems (approx 2.5 GHz) can reach up to approximately 70 miles. High frequency LMDS systems (approx 28 GHz) can only reach approximately 5 miles.
Quick Start- Some of the most popular terms and definitions:
CATV Books | |
| 1. | Introduction to Cable Television 2nd edition |
| 2. | IPTV Dictionary |
| 3. | Introduction to IP Television |
| 4. | IP Television Basics |
| 5. | Introduction to IP Video |
| 6. | Introduction to MPEG |
| 7. | IP Television Directory |
| 8. | Introduction to Mobile Video |
| 9. | Creating RFP's for IP Television Systems |
| 10. | Introduction to IP Audio |
Directories, Magazines, & Newsletters | |
| • | Satellite and Cable Magazine |
| • | CTAM |
| • | The Cable Directory |
| • | Broadcasting and Cable Magazine |
| • | NAB Online Resource Directory |
Trade Shows | |
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NTCA Wireless Symposium 2009 1/7/2009 - 1/9/2009 Austin, United States |
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CES 2009 1/8/2009 - 1/11/2009 Las Vegas, |
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ACUTA Winter Seminar 2009 1/11/2009 - 1/14/2009 Palm Springs, United States |
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OPASTCO 2009 1/17/2009 - 1/21/2009 Koloa, United States |
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Future TV 2009 1/21/2009 - 1/22/2009 New York, United States |
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NAPTE 2009 1/26/2009 - 1/29/2009 Las Vegas, United States |
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IPTV World Fourm Latin America 2009 1/27/2009 - 1/28/2009 Rio de Janeiro, Brazil |
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Internet Telephony East 2009 2/2/2009 - 2/4/2009 Miami, United States |
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NTCA 2009 2/8/2009 - 2/11/2009 Long Beach, United States |
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Blackhat 2009 2/16/2009 - 2/19/2009 Arlington, |
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ISCE 3/3/2009 - 3/9/2009 San Diego, |
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The National Franchise & Business Opportunities Show-San Jose 3/7/2009 - 3/8/2009 San Jose, United States |
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Carriers World Asia 2009 3/17/2009 - 3/19/2009 Hong Kong, Hong Kong |
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ITEX (Information Technology Education & Exposition) 3/18/2009 - 3/19/2009 Las Vegas, |
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International Wireless Communication Expo
IWCE 3/18/2009 - 3/20/2009 Las Vegas, |
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Media Summit 2009 3/18/2009 - 3/19/2009 New York City, United States |
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OMMA Global Hollywood 3/23/2009 - 3/24/2009 Hollywood, |
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IPTV World Forum 2009 3/25/2009 - 3/27/2009 Olympia, London, United Kingdom |
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Mobile TV World Summit 3/25/2009 - 3/26/2009 London, United Kingdom |
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ShoWest 3/30/2009 - 4/2/2009 Las Vegas, United States |
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MiPTV 2009 3/30/2009 - 4/3/2009 Cannes, France |
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