Wireless Wide Area Network A WWAN differs from a WLAN (wireless LAN) in that it uses Mobile telecommunication cellular network technologies such as WIMAX (though it's better applicated into WMAN Networks), UMTS, GPRS, CDMA2000, GSM, CDPD, Mobitex, HSDPA or 3G to transfer data. It can use also LMDS and Wi-Fi to connect to the Internet. These cellular technologies are offered regionally, nationwide, or even globally and are provided by a wireless service provider for a monthly usage fee.[1] WWAN connectivity allows a user with a laptop and a WWAN card to surf the web, check email, or connect to a Virtual Private Network (VPN) from anywhere within the regional boundaries of cellular service. Various computers now have integrated WWAN capabilities (Such as HSDPA in Centrino). This means that the system has a cellular radio (GSM/CDMA) built in, which allows the user to send and receive data. There are two basic means that a mobile network may use to transfer data:
Packet-switched Data Networks (GPRS/CDPD)
Circuit-switched dial-up connections
Since radio communications systems do not provide a physically secure connection path, WWANs typically incorporate encryption and authentication methods to make them more secure. Unfortunately some of the early GSM encryption techniques were flawed, and security experts have issued warnings that cellular communication, including WWANs, is no longer secure.[2] UMTS(3G) encryption was developed later and has yet to be broken.
Examples of providers for WWAN include Sprint Nextel, Verizon, and AT&T.
Friday, December 5, 2008
Linksys WMP300N Wireless N PCI Network Adpater
Highlights
High-speed Wireless-N (draft 802.11n) networking for your desktop computer
MIMO technology uses multiple radios to create a robust signal that travel far and reduces dead spots
Can connect to Wireless-G and -B networks
Enhanced wireless security with Wi-Fi Protected Access™ (WPA2) with up to 256-bit encryption
Overview
Enjoy high-speed networking without wires with the Linksys® WMP300N Wireless-N PCI Adapter. The Wireless-N PCI Adapter installs in most desktop and tower PCs, and lets you put your computer almost anywhere in the building without the hassle of running network cables. You don't have to drill holes in your walls and climb through the attic or cellar to get connected to the network. Using the wireless networking technology, Wireless-N (draft 802.11n), the card delivers enhanced speed of up to 270 Mbps. By overlaying the signals of two Wireless-N compatible radios, the 'Multiple In, Multiple Out' (MIMO) technology effectively increases the data rate. MIMO uses signal reflections to increase the range and reduce 'dead spots' in the wireless coverage area. The robust signal travels farther, maintaining wireless connections. To protect your data and privacy, the card uses 256-bit WEP encryption besides WPA and WPA2 security.
High-speed Wireless-N (draft 802.11n) networking for your desktop computer
MIMO technology uses multiple radios to create a robust signal that travel far and reduces dead spots
Can connect to Wireless-G and -B networks
Enhanced wireless security with Wi-Fi Protected Access™ (WPA2) with up to 256-bit encryption
Overview
Enjoy high-speed networking without wires with the Linksys® WMP300N Wireless-N PCI Adapter. The Wireless-N PCI Adapter installs in most desktop and tower PCs, and lets you put your computer almost anywhere in the building without the hassle of running network cables. You don't have to drill holes in your walls and climb through the attic or cellar to get connected to the network. Using the wireless networking technology, Wireless-N (draft 802.11n), the card delivers enhanced speed of up to 270 Mbps. By overlaying the signals of two Wireless-N compatible radios, the 'Multiple In, Multiple Out' (MIMO) technology effectively increases the data rate. MIMO uses signal reflections to increase the range and reduce 'dead spots' in the wireless coverage area. The robust signal travels farther, maintaining wireless connections. To protect your data and privacy, the card uses 256-bit WEP encryption besides WPA and WPA2 security.
National Television System Committee
The National Television System Committee was established in 1940 by the United States Federal Communications Commission (FCC) to resolve the conflicts that arose between companies over the introduction of a nationwide analog television system in the United States. In March 1941, the committee issued a technical standard for black-and-white television that built upon a 1936 recommendation made by the Radio Manufacturers Association (RMA). Technical advancements of the vestigial sideband technique allowed for the opportunity to increase the image resolution broadcast to consumer televisions. The NTSC compromised between RCA's desire to keep a 441–scan line standard (which was already being used by RCA's NBC TV network) and Philco's desire to increase the number of scan lines to between 605 and 800: A 525-line transmission standard was selected. Other technical standards in the final recommendation were a frame rate (image rate) of 30 frames per second consisting of two interlaced fields per frame (2:1 interlacing) at 262.5 lines per field or 60 fields per second, along with an aspect ratio of 4:3, and frequency modulation (FM) for the sound signal (which was quite new at the time).
In January 1950 the Committee was reconstituted to standardize color television. In December 1953, it unanimously approved what is now called simply the NTSC color television standard (later defined as RS-170a). The updated standard retained full backwards compatibility ("compatible color") with older black-and-white television sets. Color information was added to the black-and-white image by adding a color subcarrier of 4.5 × 455/572 MHz (approximately 3.58 MHz) to the video signal. In order to minimize interference between the chrominance signal and FM sound carrier, the addition of the color subcarrier also required a slight reduction of the frame rate from 30 frames per second to 30/1.001 (very close to 29.97) frames per second, and changing the line frequency from 15,750 Hz to 15,734.26 Hz.
The FCC had briefly approved a different color television standard, starting in October 1950, which was developed by CBS.[2] However, this standard was incompatible with black-and-white broadcasts. It used a rotating color wheel (a technique re-used in the first DLP projectors developed in the late 1980s), reduced the number of scan lines from 525 to 405, and increased the field rate from 60 to 144 (but had an effective frame rate of only 24 frames a second). Legal action by rival RCA kept commercial use of the system off the air until June 1951, and regular broadcasts only lasted a few months before manufacture of all color television sets was banned by the Office of Defense Mobilization (ODM) in October, ostensibly due to the Korean War.[3] CBS rescinded its system in March 1953,[4] and the FCC replaced it on December 17, 1953 with the NTSC color standard, which was cooperatively developed by several companies (including RCA and Philco).[5] The first publicly announced network TV broadcast of a program using the NTSC "compatible color" system was an episode of NBC's Kukla, Fran and Ollie on August 30, 1953, although it was viewable in color only at the network's headquarters.[6] The first nationwide view of NTSC color came on the following January 1 with the coast-to-coast broadcast of the Tournament of Roses Parade, viewable on prototype color receivers at special presentations across the country.
The first color NTSC television camera was the RCA TK-40, used for experimental broadcasts in 1953; an improved version, the TK-40A, introduced in March 1954, was the first commercially available color TV camera. It was replaced later that year by an improved version, the TK-41, which became the standard camera used throughout much of the 1960s.
The NTSC standard has been adopted by other countries, including most of the Americas and Japan. With the advent of digital television, analog broadcasts are being phased out. Most NTSC broadcasters are mandated by the FCC to shut down in the United States on February 17, 2009 (low power, class A and translators are not immediately affected. A cut-off date for those stations is to be determined).
In January 1950 the Committee was reconstituted to standardize color television. In December 1953, it unanimously approved what is now called simply the NTSC color television standard (later defined as RS-170a). The updated standard retained full backwards compatibility ("compatible color") with older black-and-white television sets. Color information was added to the black-and-white image by adding a color subcarrier of 4.5 × 455/572 MHz (approximately 3.58 MHz) to the video signal. In order to minimize interference between the chrominance signal and FM sound carrier, the addition of the color subcarrier also required a slight reduction of the frame rate from 30 frames per second to 30/1.001 (very close to 29.97) frames per second, and changing the line frequency from 15,750 Hz to 15,734.26 Hz.
The FCC had briefly approved a different color television standard, starting in October 1950, which was developed by CBS.[2] However, this standard was incompatible with black-and-white broadcasts. It used a rotating color wheel (a technique re-used in the first DLP projectors developed in the late 1980s), reduced the number of scan lines from 525 to 405, and increased the field rate from 60 to 144 (but had an effective frame rate of only 24 frames a second). Legal action by rival RCA kept commercial use of the system off the air until June 1951, and regular broadcasts only lasted a few months before manufacture of all color television sets was banned by the Office of Defense Mobilization (ODM) in October, ostensibly due to the Korean War.[3] CBS rescinded its system in March 1953,[4] and the FCC replaced it on December 17, 1953 with the NTSC color standard, which was cooperatively developed by several companies (including RCA and Philco).[5] The first publicly announced network TV broadcast of a program using the NTSC "compatible color" system was an episode of NBC's Kukla, Fran and Ollie on August 30, 1953, although it was viewable in color only at the network's headquarters.[6] The first nationwide view of NTSC color came on the following January 1 with the coast-to-coast broadcast of the Tournament of Roses Parade, viewable on prototype color receivers at special presentations across the country.
The first color NTSC television camera was the RCA TK-40, used for experimental broadcasts in 1953; an improved version, the TK-40A, introduced in March 1954, was the first commercially available color TV camera. It was replaced later that year by an improved version, the TK-41, which became the standard camera used throughout much of the 1960s.
The NTSC standard has been adopted by other countries, including most of the Americas and Japan. With the advent of digital television, analog broadcasts are being phased out. Most NTSC broadcasters are mandated by the FCC to shut down in the United States on February 17, 2009 (low power, class A and translators are not immediately affected. A cut-off date for those stations is to be determined).
Astro (Satellite TV)
Astro (Satellite TV)
Astro is a subscription-based direct broadcast satellite (DBS) or direct-to-home satellite television and radio service initially in Malaysia, but has expanded to Brunei and Indonesia. The service is broadcast from the All Asia Broadcast Centre (ABC) located in Bukit Jalil, Kuala Lumpur, Malaysia. Astro is owned by MEASAT Broadcast Network Systems, a subsidiary of Astro All Asia Networks plc.
Astro is a subscription-based direct broadcast satellite (DBS) or direct-to-home satellite television and radio service initially in Malaysia, but has expanded to Brunei and Indonesia. The service is broadcast from the All Asia Broadcast Centre (ABC) located in Bukit Jalil, Kuala Lumpur, Malaysia. Astro is owned by MEASAT Broadcast Network Systems, a subsidiary of Astro All Asia Networks plc.
Thursday, December 4, 2008
Wireless LAN
A wireless LAN or WLAN or wireless local area network is the linking of two or more computers or devices using spread-spectrum or OFDM modulation technology based to enable communication between devices in a limited area. This gives users the mobility to move around within a broad coverage area and still be connected to the network.
For the home user, wireless has become popular due to ease of installation, and location freedom with the gaining popularity of laptops. Public businesses such as coffee shops or malls have begun to offer wireless access to their customers; some are even provided as a free service. Large wireless network projects are being put up in many major cities. Google is even providing a free service to Mountain View, California[1] and has entered a bid to do the same for San Francisco.[2] New York City has also begun a pilot program to cover all five boroughs of the city with wireless Internet access
For the home user, wireless has become popular due to ease of installation, and location freedom with the gaining popularity of laptops. Public businesses such as coffee shops or malls have begun to offer wireless access to their customers; some are even provided as a free service. Large wireless network projects are being put up in many major cities. Google is even providing a free service to Mountain View, California[1] and has entered a bid to do the same for San Francisco.[2] New York City has also begun a pilot program to cover all five boroughs of the city with wireless Internet access
WiMAX
WiMAX, meaning Worldwide Interoperability for Microwave Access, is a telecommunications technology that provides for the wireless transmission of data using a variety of transmission modes, from point-to-point links to portable internet access[citation needed]. The technology provides up to 75 Mb/sec symmetric broadband speed without the need for cables. The technology is based on the IEEE 802.16 standard (also called Broadband Wireless Access). The name "WiMAX" was created by the WiMAX Forum, which was formed in June 2001 to promote conformity and interoperability of the standard. The forum describes WiMAX as "a standards-based technology enabling the delivery of last mile wireless broadband access as an alternative to cable and DSL".
CDMA2000
CDMA2000 is a hybrid 2.5G / 3G technology of mobile telecommunications standards that use CDMA, a multiple access scheme for digital radio, to send voice, data, and signalling data (such as a dialed telephone number) between mobile phones and cell sites. CDMA2000 is considered a 2.5G technology in 1xRTT and a 3G technology in EVDO.
CDMA (code division multiple access) is a mobile digital radio technology where channels are defined with codes (PN sequences). CDMA permits many simultaneous transmitters on the same frequency channel, unlike TDMA (time division multiple access), used in GSM and D-AMPS, and FDMA, used in AMPS ("analog" cellular). Since more phones can be served by fewer cell sites, CDMA-based standards have a significant economic advantage over TDMA- or FDMA-based standards.
CDMA2000 has a relatively long technical history, and remains compatible with the older CDMA telephony methods (such as cdmaOne) first developed by Qualcomm, a commercial company, and holder of several key international patents on the technology.
The CDMA2000 standards CDMA2000 1xRTT, CDMA2000 EV-DO, and CDMA2000 EV-DV are approved radio interfaces for the ITU's IMT-2000 standard and a direct successor to 2G CDMA, IS-95 (cdmaOne). CDMA2000 is standardized by 3GPP2.
CDMA2000 is a registered trademark of the Telecommunications Industry Association (TIA-USA) in the United States, not a generic term like CDMA. (This is similar to how TIA has branded their 2G CDMA standard, IS-95, as cdmaOne.)
CDMA2000 is an incompatible competitor of the other major 3G standard UMTS. It is defined to operate at 450 MHz, 700 MHz, 800 MHz, 900 MHz, 1700 MHz, 1800 MHz, 1900 MHz, and 2100 MHz.
Below are the different types of CDMA2000, in order of increasing complexity:
CDMA (code division multiple access) is a mobile digital radio technology where channels are defined with codes (PN sequences). CDMA permits many simultaneous transmitters on the same frequency channel, unlike TDMA (time division multiple access), used in GSM and D-AMPS, and FDMA, used in AMPS ("analog" cellular). Since more phones can be served by fewer cell sites, CDMA-based standards have a significant economic advantage over TDMA- or FDMA-based standards.
CDMA2000 has a relatively long technical history, and remains compatible with the older CDMA telephony methods (such as cdmaOne) first developed by Qualcomm, a commercial company, and holder of several key international patents on the technology.
The CDMA2000 standards CDMA2000 1xRTT, CDMA2000 EV-DO, and CDMA2000 EV-DV are approved radio interfaces for the ITU's IMT-2000 standard and a direct successor to 2G CDMA, IS-95 (cdmaOne). CDMA2000 is standardized by 3GPP2.
CDMA2000 is a registered trademark of the Telecommunications Industry Association (TIA-USA) in the United States, not a generic term like CDMA. (This is similar to how TIA has branded their 2G CDMA standard, IS-95, as cdmaOne.)
CDMA2000 is an incompatible competitor of the other major 3G standard UMTS. It is defined to operate at 450 MHz, 700 MHz, 800 MHz, 900 MHz, 1700 MHz, 1800 MHz, 1900 MHz, and 2100 MHz.
Below are the different types of CDMA2000, in order of increasing complexity:
Tuesday, December 2, 2008
Wireless Support
Wireless Support
At this moment only the RT25USB-SRC-V2.0.7.0 driver from Ralink is succesfully ported and reported to be working with an ASUS WL-167G USB dongle on 2.6.5-it0. This tutorial gives enough information to easily use the ASUS WL-167G on your OSD, but also gives enough information for everyone who wants to port another driver.
So what do you need:
* kernel 2.6.5-it0 with wireless extensions enabled, this is due to the broken USB Host driver in 2.6.15 (instructions below)
* dongle with RT2570 chipset, see serialmonkey for a list
* the source code of the dongle driver. I've succesfully 'ported' the RT25USB-SRC-V2.0.7.0 driver from Ralink
* and some version of wireless tools to send commands to the dongle, available here
* wireless support has only been tested with the developer OSD (green PCB). If you have the yellow/orange one shipped from thinkgeek then you could be the first to get wireless working on a BETA sample!
The broken USB Host driver is expected to be fixed by the manufacturer around 9/12. Until this time you will have to downgrade your OSD to a 2.6.5 kernel... and probably has the consequence that you can't play any video/audio :P
At this moment only the RT25USB-SRC-V2.0.7.0 driver from Ralink is succesfully ported and reported to be working with an ASUS WL-167G USB dongle on 2.6.5-it0. This tutorial gives enough information to easily use the ASUS WL-167G on your OSD, but also gives enough information for everyone who wants to port another driver.
So what do you need:
* kernel 2.6.5-it0 with wireless extensions enabled, this is due to the broken USB Host driver in 2.6.15 (instructions below)
* dongle with RT2570 chipset, see serialmonkey for a list
* the source code of the dongle driver. I've succesfully 'ported' the RT25USB-SRC-V2.0.7.0 driver from Ralink
* and some version of wireless tools to send commands to the dongle, available here
* wireless support has only been tested with the developer OSD (green PCB). If you have the yellow/orange one shipped from thinkgeek then you could be the first to get wireless working on a BETA sample!
The broken USB Host driver is expected to be fixed by the manufacturer around 9/12. Until this time you will have to downgrade your OSD to a 2.6.5 kernel... and probably has the consequence that you can't play any video/audio :P
WLAN WI-FI Solutions
* TrangoLINK Giga® is a split-architecture (ODU/IDU) full duplex RF microwave system link that is both native Ethernet and native-TDM.
* TrangoLINK® Apex is an all-outdoor full duplex RF microwave radio that is native-Ethernet for 100% IP traffic.
* ATLAS 4900™ is an all-outdoor native Ethernet OFDM 4.9 GHz wireless bridge that operates in the licensed Public Safety band.
Unlicensed Point-to-Point Wireless WAN Radios
* TrangoLINK-45™ is an all-outdoor, native Ethernet, multi-band OFDM wireless Ethernet bridge that is capable of operation in 4 different 5 GHz bands (5.2, 5.3, 5.4, 5.8 GHz).
* TrangoLINK-10™ is an all-outdoor, native Ethernet 5.8 GHz wireless bridge.
Unlicensed Point-to-MultiPoint Wireless WAN Radios
For delivering point-to-multipoint (PtMP) broadband access wireless WAN connectivity from a central office to many remote offices, Trango offers these robust solutions.
* Access5830™ System 5.8 GHz broadband wireless access system delivers up to 10 Mbps up to 18 miles.
* Trango M2400S™ 2.4 GHz broadband wireless access system delivers up to 5 Mbps up to 25 miles.
* Trango M900S™ 900 MHz broadband wireless access system delivers up to 3 Mbps up to 20 miles.
* TrangoLINK® Apex is an all-outdoor full duplex RF microwave radio that is native-Ethernet for 100% IP traffic.
* ATLAS 4900™ is an all-outdoor native Ethernet OFDM 4.9 GHz wireless bridge that operates in the licensed Public Safety band.
Unlicensed Point-to-Point Wireless WAN Radios
* TrangoLINK-45™ is an all-outdoor, native Ethernet, multi-band OFDM wireless Ethernet bridge that is capable of operation in 4 different 5 GHz bands (5.2, 5.3, 5.4, 5.8 GHz).
* TrangoLINK-10™ is an all-outdoor, native Ethernet 5.8 GHz wireless bridge.
Unlicensed Point-to-MultiPoint Wireless WAN Radios
For delivering point-to-multipoint (PtMP) broadband access wireless WAN connectivity from a central office to many remote offices, Trango offers these robust solutions.
* Access5830™ System 5.8 GHz broadband wireless access system delivers up to 10 Mbps up to 18 miles.
* Trango M2400S™ 2.4 GHz broadband wireless access system delivers up to 5 Mbps up to 25 miles.
* Trango M900S™ 900 MHz broadband wireless access system delivers up to 3 Mbps up to 20 miles.
Wireless WAN Solutions
Extend your network infrastructure with long range
outdoor wireless Ethernet connections
Trango's long range fixed wireless broadband Ethernet equipment is ideal for all types of wireless wide area network (WWAN) and wireless local area network (WLAN) applications. Trango outdoor wireless networking solutions allow you to quickly, easily, and cost effectively deploy reliable, high-speed, secure wireless IP connections between multiple remote locations at distances up to 45+ miles, and enable you to eliminate your costly leased lines and avoid expensive time consuming fiber trenching.
Wireless WAN Applications
Wireless WAN applications are endless for Trango long-range wireless Ethernet bridges. For example, a business may need to link its IT infrastructure to a few outlying buildings; a university or any school may need to provide internet access to dormitories or other buildings across campus; or a hospital may need to establish a secure link to a clinic across town so that doctors may securely exchange patient information over a high-speed connection.
Whether you need to a network connection across the street, across town, or from urban to rural areas, Trango wireless WAN/LAN building-to-building outdoor networks are ideal for any private enterprise or network operator that requires high-speed connectivity between two or more remote locations. Trango long range wireless wide area network (WWAN) solutions are well suited for a wide variety of industries and applications because they deliver high-capacity bandwidth, are extremely reliable, highly secure, and can be established with minimal effort and cost.
Licensed Point-to-Point Wireless WAN Radios
* TrangoLINK Giga® is a split-architecture (ODU/IDU) full duplex RF microwave system link that is both native Ethernet and native-TDM.
* TrangoLINK® Apex is an all-outdoor full duplex RF microwave radio that is native-Ethernet for 100% IP traffic.
* ATLAS 4900™ is an all-outdoor native Ethernet OFDM 4.9 GHz wireless bridge that operates in the licensed Public Safety band.
Unlicensed Point-to-Point Wireless WAN Radios
* TrangoLINK-45™ is an all-outdoor, native Ethernet, multi-band OFDM wireless Ethernet bridge that is capable of operation in 4 different 5 GHz bands (5.2, 5.3, 5.4, 5.8 GHz).
* TrangoLINK-10™ is an all-outdoor, native Ethernet 5.8 GHz wireless bridge.
Unlicensed Point-to-MultiPoint Wireless WAN Radios
For delivering point-to-multipoint (PtMP) broadband access wireless WAN connectivity from a central office to many remote offices, Trango offers these robust solutions.
* Access5830™ System 5.8 GHz broadband wireless access system delivers up to 10 Mbps up to 18 miles.
* Trango M2400S™ 2.4 GHz broadband wireless access system delivers up to 5 Mbps up to 25 miles.
* Trango M900S™ 900 MHz broadband wireless access system delivers up to 3 Mbps up to 20 miles.
outdoor wireless Ethernet connections
Trango's long range fixed wireless broadband Ethernet equipment is ideal for all types of wireless wide area network (WWAN) and wireless local area network (WLAN) applications. Trango outdoor wireless networking solutions allow you to quickly, easily, and cost effectively deploy reliable, high-speed, secure wireless IP connections between multiple remote locations at distances up to 45+ miles, and enable you to eliminate your costly leased lines and avoid expensive time consuming fiber trenching.
Wireless WAN Applications
Wireless WAN applications are endless for Trango long-range wireless Ethernet bridges. For example, a business may need to link its IT infrastructure to a few outlying buildings; a university or any school may need to provide internet access to dormitories or other buildings across campus; or a hospital may need to establish a secure link to a clinic across town so that doctors may securely exchange patient information over a high-speed connection.
Whether you need to a network connection across the street, across town, or from urban to rural areas, Trango wireless WAN/LAN building-to-building outdoor networks are ideal for any private enterprise or network operator that requires high-speed connectivity between two or more remote locations. Trango long range wireless wide area network (WWAN) solutions are well suited for a wide variety of industries and applications because they deliver high-capacity bandwidth, are extremely reliable, highly secure, and can be established with minimal effort and cost.
Licensed Point-to-Point Wireless WAN Radios
* TrangoLINK Giga® is a split-architecture (ODU/IDU) full duplex RF microwave system link that is both native Ethernet and native-TDM.
* TrangoLINK® Apex is an all-outdoor full duplex RF microwave radio that is native-Ethernet for 100% IP traffic.
* ATLAS 4900™ is an all-outdoor native Ethernet OFDM 4.9 GHz wireless bridge that operates in the licensed Public Safety band.
Unlicensed Point-to-Point Wireless WAN Radios
* TrangoLINK-45™ is an all-outdoor, native Ethernet, multi-band OFDM wireless Ethernet bridge that is capable of operation in 4 different 5 GHz bands (5.2, 5.3, 5.4, 5.8 GHz).
* TrangoLINK-10™ is an all-outdoor, native Ethernet 5.8 GHz wireless bridge.
Unlicensed Point-to-MultiPoint Wireless WAN Radios
For delivering point-to-multipoint (PtMP) broadband access wireless WAN connectivity from a central office to many remote offices, Trango offers these robust solutions.
* Access5830™ System 5.8 GHz broadband wireless access system delivers up to 10 Mbps up to 18 miles.
* Trango M2400S™ 2.4 GHz broadband wireless access system delivers up to 5 Mbps up to 25 miles.
* Trango M900S™ 900 MHz broadband wireless access system delivers up to 3 Mbps up to 20 miles.
Sunday, November 16, 2008
Pros and Cons of Connecting Computers and TVs
Networking your computers and TVs provides the most convenient sharing of multimedia images:
- does not require connecting a digital camcorder or camera to the TY
- can make the necessary connections with either Windows, Mac or Linux computers
- with Media Center Extender or similar capability, can direct content from any home computer to the TV
You may also encounter a few challenges and limitations:
- the screen resolution of older TVs is much lower than modern computer displays - your images and video may appear with lower quality when shown on the television
- when using AV cables, you may need to relocate the laptop or PC very close to the television to reach
- when using wireless connections, the effective range may be relatively short, depending on the equipment in use, due to the high volume of data involved in digital media
- hardware needed, especially the more advanced wireless gear, may be expensive to purchase
- does not require connecting a digital camcorder or camera to the TY
- can make the necessary connections with either Windows, Mac or Linux computers
- with Media Center Extender or similar capability, can direct content from any home computer to the TV
You may also encounter a few challenges and limitations:
- the screen resolution of older TVs is much lower than modern computer displays - your images and video may appear with lower quality when shown on the television
- when using AV cables, you may need to relocate the laptop or PC very close to the television to reach
- when using wireless connections, the effective range may be relatively short, depending on the equipment in use, due to the high volume of data involved in digital media
- hardware needed, especially the more advanced wireless gear, may be expensive to purchase
Monday, November 3, 2008
Broadcasting
It was available mostly in markets in which Raycom Media operates stations. According to a March 2006 article in The New York Times, Tribune Broadcasting announced that it would start multicasting The Tube on its DTV channels in summer 2006. [1] However, it began transmission on digital television in New York City, Los Angeles, Chicago, and Philadelphia. The network also broadcasted on WLVI in Boston, which was purchased from Tribune by Sunbeam Television in late December 2006.
Equity Broadcasting distributed the programming free-to-air on Galaxy 10R Ku-band satellite for carriage by some of the individual LPTV operations which it owned and operated in various US cities.
Sinclair Broadcasting would join in on airing The Tube as well, announcing on March 23, 2006 that they would start multicasting the network on many of their outlets. [2] That relationship stopped temporarily (and eventually permanently) on January 1, 2007, in a dispute involving FCC requirements for digital subchannels.
The FCC ruled that in addition to the main analog channels, each digital subchannel would also be required to run the government mandated the hours of E/I programming per week as well as any Emergency Alert System tests and bulletins. The Tube would air the animal-and-music program Wildlife Jams to meet the E/I requirements.
Equity Broadcasting distributed the programming free-to-air on Galaxy 10R Ku-band satellite for carriage by some of the individual LPTV operations which it owned and operated in various US cities.
Sinclair Broadcasting would join in on airing The Tube as well, announcing on March 23, 2006 that they would start multicasting the network on many of their outlets. [2] That relationship stopped temporarily (and eventually permanently) on January 1, 2007, in a dispute involving FCC requirements for digital subchannels.
The FCC ruled that in addition to the main analog channels, each digital subchannel would also be required to run the government mandated the hours of E/I programming per week as well as any Emergency Alert System tests and bulletins. The Tube would air the animal-and-music program Wildlife Jams to meet the E/I requirements.
Displaying Digital Images on The TV
With a digital camera or video recorder, you can create multimedia image files stored on your PCs. Showing these images to others can be inconvenient, however, especially if your computer screen is small and located in a private room of the house. Displaying them on a television usually allows you to show them at a larger size and in a more comfortable location. You can connect a computer to a TV either wirelessly or with cables. The best method to choose depends on the types of connections your TV supports as well as your budget for purchasing additional hardware.
Connecting Computers to TVs With Wires
Televisions do not normally support Ethernet cable connections. Instead, you will typically connect your laptop or desktop PC to a TV using one of the following types of audio-visual (AV) cables:
- S-Video
- HDMI
- DVI or HDMI-to-DVI
- VGA
- Any of the above - to-SCART (in Europe
A scan converter is a device that translates the computer's video signal into standard TV formats. You may need to set up a scan converter to connect your computer and TV if, between them, the two do not support any compatible combination of AV cable technologies listed above. Newer televisions, however, generally support multiple types of digital inputs, and finding the right cable should not be too difficult.
- S-Video
- HDMI
- DVI or HDMI-to-DVI
- VGA
- Any of the above - to-SCART (in Europe
A scan converter is a device that translates the computer's video signal into standard TV formats. You may need to set up a scan converter to connect your computer and TV if, between them, the two do not support any compatible combination of AV cable technologies listed above. Newer televisions, however, generally support multiple types of digital inputs, and finding the right cable should not be too difficult.
Connecting Computers to TVs Wirelessly
As an alternative to using cables, you can also use Wi-Fi to connect computers and TVs wirelessly. Because televisions do not ordinarily support Wi-Fi, you will need to install a separate unit between the computer and TV. One common solution is called a Wireless PC to TV system or [i[Digital Media Receiver. These products connect via AV cable to the TV and supply Wi-Fi connections to any computer in the home.
Another wireless PC to TV connectivity option is based on Windows Media Center Edition (MCE). If you purchase a Windows XP or Windows Vista PC with the MCE application included, this system contains built in wireless connectivity support for streaming images to your television. Some of these systems also support TV tuner cards that allow your computer to receive incoming television signals. Finally, you can extend the capability of a Media Center PC across an entire wireless home network by installing a Media Center Extender product like the LInksys DMA2100.
Another wireless PC to TV connectivity option is based on Windows Media Center Edition (MCE). If you purchase a Windows XP or Windows Vista PC with the MCE application included, this system contains built in wireless connectivity support for streaming images to your television. Some of these systems also support TV tuner cards that allow your computer to receive incoming television signals. Finally, you can extend the capability of a Media Center PC across an entire wireless home network by installing a Media Center Extender product like the LInksys DMA2100.
Satellite TV
Satellite television is the fastest growing programming provider in the country. While it's becoming quite popular many people don't have a clear understanding of how it works or why they need it. Satellite television uses satellites that orbit the earth to send programming signals to customers. The satellite providers use their own satellites that are capable of providing multiple channels at a time. The signals are sent from the satellite provider station to the satellite in space. The satellite then can redirect the signals to earth. The satellites must be set up to allow for consistent signals to earth.
Satellite signals are scrambled signals that require special decoding in order to be viewed. The signals go through the air and are captured by a customer's satellite dish. Today's satellite dishes are small and compact compared to those of even several years ago. Contrary to popular belief the satellite dish doesn't need to be turned or adjusted once it is in place. This is due to more sophisticated signaling. It's best to have your satellite installed professionally. The satellite company often provides expert installation at a reduced rate and sometimes even for free.
Satellite requires a receiver unit. The satellite dish is hooked up to the receiver via a cable that is run into the home. The receiver is placed next to the television set. The installer will hook up the television as well as any other devices you may have such as a DVD or VCR player. More than one television can be hooked up to the satellite dish allowing different programs to be watched at the same time.
The receiver unit may also be a DVR, digital recording device. The DVR allows you to rewind and pause live television, view more than one program at once and most importantly lets you quickly and easily record programs. The DVR records programs with a simple touch of the remote. The programs are recorded on the hard drive of the unit, which can store many hours of shows. Simple commands let you record all episodes of your favorite shows for later viewing.
The receiver provides updated programming so that you can see what is scheduled on the stations that you receive. You can choose the program package that suits you the best. There are typically several options to pick from. Basic satellite programming gives you the least amount of channels. Family programming usually gives the best selections. Deluxe programming gives you access to almost all the stations available. You can also add on to the programming. For example local channels aren't usually included in standard packages. You can add local channels for a small monthly fee.
You can also add other specialized programming to your Direct TV packages. Premium movie channels are some of the most common types of additional programming that you can add. Sports enthusiasts will enjoy special sports channel programming that gives access to many more sports at all times of the day and night. You can also access pay-per-view programming and the costs will be conveniently added to your monthly bill. Get the best options and deals for Satellite TV with Direct TV, the leader in the industry.
Satellite signals are scrambled signals that require special decoding in order to be viewed. The signals go through the air and are captured by a customer's satellite dish. Today's satellite dishes are small and compact compared to those of even several years ago. Contrary to popular belief the satellite dish doesn't need to be turned or adjusted once it is in place. This is due to more sophisticated signaling. It's best to have your satellite installed professionally. The satellite company often provides expert installation at a reduced rate and sometimes even for free.
Satellite requires a receiver unit. The satellite dish is hooked up to the receiver via a cable that is run into the home. The receiver is placed next to the television set. The installer will hook up the television as well as any other devices you may have such as a DVD or VCR player. More than one television can be hooked up to the satellite dish allowing different programs to be watched at the same time.
The receiver unit may also be a DVR, digital recording device. The DVR allows you to rewind and pause live television, view more than one program at once and most importantly lets you quickly and easily record programs. The DVR records programs with a simple touch of the remote. The programs are recorded on the hard drive of the unit, which can store many hours of shows. Simple commands let you record all episodes of your favorite shows for later viewing.
The receiver provides updated programming so that you can see what is scheduled on the stations that you receive. You can choose the program package that suits you the best. There are typically several options to pick from. Basic satellite programming gives you the least amount of channels. Family programming usually gives the best selections. Deluxe programming gives you access to almost all the stations available. You can also add on to the programming. For example local channels aren't usually included in standard packages. You can add local channels for a small monthly fee.
You can also add other specialized programming to your Direct TV packages. Premium movie channels are some of the most common types of additional programming that you can add. Sports enthusiasts will enjoy special sports channel programming that gives access to many more sports at all times of the day and night. You can also access pay-per-view programming and the costs will be conveniently added to your monthly bill. Get the best options and deals for Satellite TV with Direct TV, the leader in the industry.
Digital Satellite TV - End of Analog Television
That is not to say that there are not any other online retailers of digital satellite TV services; it is just that there is very little choice in type of services being offered and most of these providers only differ from one another in their marketing and promotional offers, and nothing else. This is certainly a big constraint given the fact that watching digital satellite TV will only be enjoyable if there are more than a few options to choose from.
Digital satellite TV represents a quantum leap in quality over the traditional analog TVs that for long were the only types of television sets available on the market. However, even if you have bought a satellite TV you will still need to ensure that the set that you purchased must be able to handle the kind of resolution required to get the most out of your service.
In addition, you will also require buying a satellite television system that consists of a receiver as well as satellite dish and which is essential to enjoying your channels. Besides improvement in quality of pictures that a digital TV provides you, you are also sure to get more choice in regard to larger selection of television channels as compared to what is available with analog television sets.
However, not everything about watching satellite TV is hunky-dory as there is a minor downside to contend with, especially in that bad weather conditions which will cause severe disturbance to your viewing because strong winds or even storms can sever your television connection and then all that you will see on your television screen would be fuzzy pictures or no pictures at all.
Other than this minor hiccup, a digital satellite TV outpoints the analog television set on all counts and that is why people have given up buying analog television sets. Furthermore, if you are keen on watching premium or even pay-per-view television broadcasts you will also need to buy a digital TV descrambler.
The current popularity of the digital satellite TV makes it almost impossible not to also buy one for your television viewing; and, if you have teenagers in your home you would have no option but to accede to their demands for a digital satellite TV without which they would not be able to their favorite television channels.
Digital satellite TV represents a quantum leap in quality over the traditional analog TVs that for long were the only types of television sets available on the market. However, even if you have bought a satellite TV you will still need to ensure that the set that you purchased must be able to handle the kind of resolution required to get the most out of your service.
In addition, you will also require buying a satellite television system that consists of a receiver as well as satellite dish and which is essential to enjoying your channels. Besides improvement in quality of pictures that a digital TV provides you, you are also sure to get more choice in regard to larger selection of television channels as compared to what is available with analog television sets.
However, not everything about watching satellite TV is hunky-dory as there is a minor downside to contend with, especially in that bad weather conditions which will cause severe disturbance to your viewing because strong winds or even storms can sever your television connection and then all that you will see on your television screen would be fuzzy pictures or no pictures at all.
Other than this minor hiccup, a digital satellite TV outpoints the analog television set on all counts and that is why people have given up buying analog television sets. Furthermore, if you are keen on watching premium or even pay-per-view television broadcasts you will also need to buy a digital TV descrambler.
The current popularity of the digital satellite TV makes it almost impossible not to also buy one for your television viewing; and, if you have teenagers in your home you would have no option but to accede to their demands for a digital satellite TV without which they would not be able to their favorite television channels.
Broadband Pioneer Makes Tracks With EMC As Core Info Infrastructure
EMC Corporation, the world's leading provider of enterprise storage systems, software, and services, today announced that North American DataCom, Inc. (OTC BB:NADA and www.nadata.com), a developer of broadband and fiber optic networks, has selected EMC Enterprise Storage systems and software as the nucleus of a leading-edge information infrastructure. The EMC E-Infostructure will serve as the foundation for North American DataCom's high-speed and scalable data storage, Internet access, and telecommunications network services.
"Our investment in a new EMC infrastructure is central to our transformation from an Internet access provider to a broad-based supplier of cutting-edge telecommunications and computing services," said Robert Roy Crawford, President of North American DataCom. "As the critical underpinning of our new infrastructure, EMC's advanced storage and software enable us to rapidly scale-up and adapt our business to address new markets and customers with instant and reliable information access."
To bring high-speed network bandwidth to its customers, North American DataCom is laying fiber optic cable along thousands of miles of railroad tracks in the U.S.
"We're doing for the information revolution what railroads did for the industrial revolution," commented Crawford. "But, instead of moving tons per mile, we're moving terabytes per second. We are marrying our pioneering technology in broadband networks with EMC's Enterprise Storage to provide our customers with exceptionally well-protected and high-speed access to their mission-critical information."
North American DataCom will offer its customers remotely mirrored data storage services using EMC Symmetrix Remote Data Facility (SRDF) software. Said Crawford, "EMC's SRDF software and Symmetrix storage provide our customers with a cost-efficient way to remotely mirror their mission-critical data resources. With EMC, our customers gain access to the world's most sophisticated data protection technology and avoid the expense and associated headaches of operating their own backup or disaster recovery facilities."
Based in Iuka, Mississippi, North American DataCom will use other EMC software to derive significantly more value from its infrastructure. Said Ted Roberts, North American DataCom's Vice President and Chief Operating Officer, "EMC ControlCenter's centralized management capability will automatically identify problems and ensure uninterrupted availability of our customer services. And EMC PowerPath software will allow us to take information availability one step further through automatic load balancing, which will insulate our customers from peak demand periods or any other unexpected bottlenecks."
Michael Ruffolo, EMC's Executive Vice President, Global Sales, Service and Marketing, said, "Rapid, efficient, and secure information access is the cornerstone of success for today's wired enterprises. North American Datacom's decision to center its business infrastructure around EMC assures that it will be able to fully seize the opportunities presented by the fast-moving and burgeoning broadband market."
EMC Corporation (NYSE: EMC) is the world leader in information storage systems, software, networks and services, providing the information infrastructure for a connected world. Information about EMC's products and services can be found at http://www.emc.com.
EMC and Symmetrix are registered trademarks and EMC Enterprise Storage, Symmetrix Remote Data Facility, ControlCenter and PowerPath are trademarks of EMC Corporation. Other trademarks are the property of their respective owners.
"Our investment in a new EMC infrastructure is central to our transformation from an Internet access provider to a broad-based supplier of cutting-edge telecommunications and computing services," said Robert Roy Crawford, President of North American DataCom. "As the critical underpinning of our new infrastructure, EMC's advanced storage and software enable us to rapidly scale-up and adapt our business to address new markets and customers with instant and reliable information access."
To bring high-speed network bandwidth to its customers, North American DataCom is laying fiber optic cable along thousands of miles of railroad tracks in the U.S.
"We're doing for the information revolution what railroads did for the industrial revolution," commented Crawford. "But, instead of moving tons per mile, we're moving terabytes per second. We are marrying our pioneering technology in broadband networks with EMC's Enterprise Storage to provide our customers with exceptionally well-protected and high-speed access to their mission-critical information."
North American DataCom will offer its customers remotely mirrored data storage services using EMC Symmetrix Remote Data Facility (SRDF) software. Said Crawford, "EMC's SRDF software and Symmetrix storage provide our customers with a cost-efficient way to remotely mirror their mission-critical data resources. With EMC, our customers gain access to the world's most sophisticated data protection technology and avoid the expense and associated headaches of operating their own backup or disaster recovery facilities."
Based in Iuka, Mississippi, North American DataCom will use other EMC software to derive significantly more value from its infrastructure. Said Ted Roberts, North American DataCom's Vice President and Chief Operating Officer, "EMC ControlCenter's centralized management capability will automatically identify problems and ensure uninterrupted availability of our customer services. And EMC PowerPath software will allow us to take information availability one step further through automatic load balancing, which will insulate our customers from peak demand periods or any other unexpected bottlenecks."
Michael Ruffolo, EMC's Executive Vice President, Global Sales, Service and Marketing, said, "Rapid, efficient, and secure information access is the cornerstone of success for today's wired enterprises. North American Datacom's decision to center its business infrastructure around EMC assures that it will be able to fully seize the opportunities presented by the fast-moving and burgeoning broadband market."
EMC Corporation (NYSE: EMC) is the world leader in information storage systems, software, networks and services, providing the information infrastructure for a connected world. Information about EMC's products and services can be found at http://www.emc.com.
EMC and Symmetrix are registered trademarks and EMC Enterprise Storage, Symmetrix Remote Data Facility, ControlCenter and PowerPath are trademarks of EMC Corporation. Other trademarks are the property of their respective owners.
Subscribe to:
Posts (Atom)
