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Broadband/CATV


Broadband/CATV represents one of the most successful home subscription services ever deployed. What began as an alternative to broadcast TV, meant to bring analog television service to remote areas, has evolved into a two-way, user-controlled, on-demand system. Today’s Broadband/CATV systems may include some or all the following capabilities:
  • Improved television Quality of Service (QOS) - both analog and digital
  • High speed internet access via cable modem
  • Interactive TV
  • Access to Hi-Definition TV (HDTV)
  • On-demand movies
  • Phone service (mainly Voice Over Internet Protocol – VOIP)
  • Home networking

Richardson RFPD offers a wide range of products that are ideal for Broadband/CATV infrastructure and customer equipment, including line amplifiers, drop amplifiers, and reverse amplifiers, switches, splitters, attenuators, filters, diplexers and data converters. For more details on the products available to meet your Broadband/CATV needs, please select from the appropriate categories below. For other inquiries, or for design assistance, please Contact Us.

 

Growing Stronger Every Year
The Broadband & Cable TV (Broadband/CATV) market, though maturing, continues to show solid growth in all parts of the world.This is mainly due to continued expansion into underdeveloped (in terms of infrastructure) countries, increasing market penetration (i.e. ‘take rate”) in developed countries, and to a continuous stream of system/capability upgrades. What started out as a purely analog TV signal has now become both analog and digital together, coexisting within the same coaxial cable. Digital TV and High-Speed Internet Access is where the main growth is coming from, with the analog TV portion in decline. Some important statistics:

  • The Broadband/CATV infrastructure market growth continues to exceed 15% per year.
  • The Set Top Box (STB) market is growing even faster worldwide, with particularly strong growth in Asia, where the STB growth rate exceeds 30% per year.
  • Digital STBs now represent 95% of all those sold, with Analog STBs sales in rapid decline.

What is the Focus of Richardson RFPD in Broadband/CATV Networks?
The final stages of a large CATV network consist of both infrastructure equipment, designed to transmit encoded RF signals to and from the households, and splitters, Set Top Boxes (STB), cable modems, and/or routers to tune and decode these signals within the home.

Our focus is clearly in the final infrastructure portion of Broadband/CATV provider networks. A typical Infrastructure line-up consists of a “head-end”, fiber optic transmission nodes, trunk amplifiers, line amplifiers, drop amplifiers,and reverse amplifiers. We supply a wide selection of products for all of these network infrastructure devices.

Block Diagram
We have drawn 2 representative block diagrams (see below)


click the image
to view the block diagram

Broadband/CATV Infrastructure

click the image
to view the block diagram

Broadband/CATV At The Residence

Broadband/CATV Standards
Today’s Broadband/CATV services (internet data and television) are based on International technology standards. In the U.S., the “Data Over Cable Service Interface Specification” (DOCSIS) was originally developed by CableLabs and many other contributors. Version 1.0 was issued in March, 1997. Version 1.1, which added Quality of Service (QoS) capabilities, was subsequently released in April, 1999. About two years later, DOCSIS 2.0 (released in December, 2001) was mainly an enhancement to the upstream transmission speeds.

The International Telecommunications Union Telecommunications Standardization Sector (ITU-T) has approved the various versions of DOCSIS as international standards. DOCSIS 1.0 was ratified as ITU-T Recommendation J.112 Annex B (1998), but it was quickly superseded by DOCSIS 1.1, ratified as ITU-T Recommendation J.112 Annex B (2001). Subsequently, DOCSIS 2.0 was ratified as ITU-T Recommendation J.122.As frequency allocation band plans differ between U.S. and European CATV systems, DOCSIS standards have been modified for use in Europe. These changes were published under the name of "EuroDOCSIS". The main differences account for differing TV channel bandwidths; European cable channels conform to PAL TV standards and are 8 MHz wide, whereas in North-America cable channels conform to NTSC standards which specify 6MHz. The wider bandwidth in EuroDOCSIS architectures permits more bandwidth to be allocated to the downstream data path (toward the user). Japan employs other variants of DOCSIS.

Newer Broadband/CATV standards include:

  • DOCSIS 3.0 / EuroDOCSIS
    • International standard defining interface requirements for internet (IPv6) data over cable.
    • Increased data transmission speeds up to 152 Mbps downlink and 108 Mbps uplink, versus DOCSIS 2.0 standard with 38 Mbps and 27 Mbps respectively (4 - 6 MHz channels are used in 3.0 to achieve these speeds).
    • EuroDOCSIS data transmission speeds up to 200 Mbps downlink and 108 Mbps uplink, versus EuroDOCSIS 2.0 standard with 50 Mbps and 27 Mbps respectively (4 - 8 MHz channels are used in 3.0 to achieve these speeds).
    • Improves cable modem and Interactive CATV response times by a factor of 4.
  • MoCA (Multimedia over Coax Alliance)
    • MoCA is an organization developing standards for home networking over existing in-home coaxial cable.
    • It creates a complete home high-speed entertainment network with multiple STBs throughout the house, in any room.
    • MoCA uses 1GHz band with speeds up to 100 Mbps.

*From Wikipedia

The abbreviation CATV is often used to mean "Cable TV". It originally stood for Community Antenna Television, from cable television's origins in 1948. In areas where over-the-air reception was limited by extreme distances from transmitters or by mountainous terrain, large "community antennas" were constructed, and coaxial cable was run from the antennas to the individual homes.

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