New Solution Offers Up to 80 HD Signals and Option for a Signal Generator and HD Monitors

LAS VEGAS, APRIL 6, 2010 – MultiDyne, a premier provider of fiber optic-based video and audio transport and routing solutions for broadcast and pro A/V applications, will unveil its brand new LiGHTCuBE fiber optic field transport system at this year’s NAB (Booth C7637). In addition, MultiDyne will also introduce the option for an HD or composite signal generator as well as HD monitors on the LiGHTCuBE, giving broadcasters unprecedented ability to test and monitor signals in the field.

Capable of housing any product in the MultiDyne product line, the LiGHTCuBE represents the company’s most customizable, rugged and high-density solution to date. Designed for the fiber optic field transport of composite, HD video, PL, IFB, audio and more, the LiGHTCuBE can be configured for as many as 80 HD-SDI, SDI or composite video paths, with 225 AES or analog audio channels. The LiGHTCuBE is also compatible with DVI, RGB and HDMI and is AC and fully battery powered.

In addition, the new test and monitor features make the LiGHTCuBE especially effective for in-the-field signal monitoring. With an HD monitor and signal generator on either end of the product, users can test the circuit even if the camera has not arrived. Further, the HD test signal generator option also allows users to send the test pattern down the line, or to send the signal from the studio end directly to the LiGHTCuBE. This function allows users to monitor the camera output and the signals arriving at the shoot, and can be added to any solution in MultiDyne’s LiGHTBoX product line.

“With our new LiGHTCuBE, the options for the end-user are virtually limitless,” says Frank Jachetta, senior vice president of sales and operations for MultiDyne. “Not only does the LiGHTCuBE hold more HD, analog video and audio signals than any other solution in our product line, it is also extremely customizable, even by the end-user. Our new test and monitor features provide even more value. Customers who were creating their own makeshift flyaway case to house many video signals will finally have access to a smaller, cost-effective and extremely high-quality solution for all their fiber optic transport needs.”

A major benefit also lies in the LiGHTCuBE’s size. Though this solution is heavy on HD and audio signals, the LiGHTCuBEv is a compact and extremely portable 14-inch cube design, making it small enough for sports and ENG, an announce booth setting, as well as any field application where signal density is a must. Additional carry handles allow users to “grab-and-go” for remote or on-location broadcasts. A weather resistant cover is also available.

The LiGHTCuBE is exceptionally versatile and can be used in a number of different broadcast and pro A/V situations. It is ideal for applications including large-scale outdoor arena sporting events where a user requires a rugged, highly weather-proof solution for handling massive amounts of HD signals. The LiGHTCuBE is also a perfect fit for users transporting high-density audio; for example, in a live symphony or orchestra broadcast setting with over 60 microphones, the LiGHTCuBE can manage audio bottlenecks, transporting signals seamlessly to an OB van or studio.

The LiGHTCuBE can be linked using tactical or conventional fiber to any MultiDyne solution, including the DVM-2500, HD-1500, HD-3000, HDMI-ONE, DVI-6000 as well as many non-MultiDyne products. In addition, the LiGHTCuBE offers users intercom, PL, IFB and belt pack support.  For more information on the LiGHTCuBE and its optional test and monitor features, please visit the MultiDyne website at: http://www.multidyne.com/productdetail.cfm?ProductID=247.

About MultiDyne:

For more than 30 years, MultiDyne has been a leading provider of innovative and outstanding video and fiber optic-based transport and routing systems for the broadcast, cable, satellite, production, digital cinema, pro A/V, corporate, retail, surveillance, teleconferencing, judicial arraignment, transportation, government, military, and healthcare markets. MultiDyne’s fiber optic transport and routing systems for video, SDI, 3G HD, DVB/ASI, VGA, DVI, HDMI, audio, AES, Ethernet, data, CATV, as well as the company’s other broadcast accessories are used worldwide by such industry leaders as ABC, CBS, NBC, CNN, RAI, BBC and the Department of Transportation. MultiDyne provides a seven-year warranty on its core product line. For more information, call MultiDyne at 1-877-MULTIDYNE or 1-516-671-7278, visit the company’s Web site at www.multidyne.com, or send an e-mail to sales@multidyne.com.

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LAS VEGAS, APRIL 5, 2010 – MultiDyne Video & Fiber Optic Systems, a premier provider of fiber optic-based video and audio transport and routing solutions for broadcast and pro A/V applications, today announces that Frank Jachetta will be taking on the role of managing director. In line with the company’s continued growth and industry momentum, MultiDyne has also enhanced its sales force with a new addition and a promotion. Fred Scott, a 20-year industry veteran, will join the company as vice president of sales and business development, while Matt Watkins, inside sales manager, has been promoted to sales and system design manager.

Previously serving as senior vice president of sales and operations, Frank will now oversee all facets of MultiDyne’s business as managing director. With the relocation of Jim Jachetta, the company’s former senior vice president of engineering and product development, to pursue other interests in Orange County, CA, Frank will now step into a larger role managing the company’s day-to-day operations. In his new position, Frank will provide strategic oversight of both the sales and engineering teams, continuing the company’s tradition of innovation and unparalleled customer service for the fiber optics and routing solutions market.

“On behalf of our entire company, we want to thank Jim for all of his contributions during his tenure at MultiDyne,” says Frank Jachetta. “We wish him luck in all of his endeavors. Moving forward, we are excited to welcome Fred Scott to the company. Our number one commitment has always been our customers, and we are thrilled to leverage the strengths both Fred and Matt bring to the table in order to better serve our customer base and augment the tremendous growth we’re experiencing.”

As vice president of sales and business development, Scott will be responsible for driving the expansion of MultiDyne’s business, overseeing and coordinating all of the company’s sales activities worldwide. With previous positions at several of the industry’s biggest fiber companies, including Communications Specialties Inc. and GE Industrial Systems (formerly Fiber Options), Scott brings a deep understanding of the fast-evolving industry to his new position. With a wealth of experience developing OEM agreements, training sales staff and negotiating major sales with national and international brands, Scott will work closely with current and potential customers to find the best solution for their fiber-optic video and audio transport and routing needs.

Previously serving as inside sales manager for MultiDyne, Watkins will further enhance the company’s growing sales team in his new position as sales and system design manager. In this expanded role, Watkins will represent MultiDyne at the company’s tradeshows nationwide, interfacing directly with clients to provide excellent customer service and support.

MultiDyne’s sales team will be serving customers at NAB 2010 – stop by to meet the entire team and preview the company’s innovative new products for 2010 at Booth C7637.

About MultiDyne:

For more than 30 years, MultiDyne has been a leading provider of innovative and outstanding video and fiber optic-based transport and routing systems for the broadcast, cable, satellite, production, digital cinema, pro A/V, corporate, retail, surveillance, teleconferencing, judicial arraignment, transportation, government, military, and healthcare markets. MultiDyne’s fiber optic transport and routing systems for video, SDI, 3G HD, DVB/ASI, VGA, DVI, HDMI, audio, AES, Ethernet, data, CATV, as well as the company’s other broadcast accessories are used worldwide by such industry leaders as ABC, CBS, NBC, CNN, RAI, BBC and the Department of Transportation. MultiDyne provides a seven-year warranty on its core product line. For more information, call MultiDyne at 1-877-MULTIDYNE or 1-516-671-7278, visit the company’s Web site at www.multidyne.com, or send an e-mail to sales@multidyne.com.

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New Solution Builds Upon Standard Model with Even More Signal Paths for 3D

LOCUST VALLEY, NY, MARCH 22, 2010 – MultiDyne, a premier provider of fiber optic-based video and audio transport and routing solutions for broadcast and pro A/V applications, will introduce a new LiGHTBoX^® 3D field fiber transport system at this year’s NAB (Booth C7637). With the explosion of 3D in the broadcast industry, MultiDyne has re-configured its popular LiGHTBoX solution to serve this growing market.

MultiDyne’s new LiGHTBoX 3D addresses the unique transport needs of 3D production while maintaining the unparalleled ruggedness and configurability of the standard LiGHTBoX. This original solution has been a mainstay in the equipment kits of sports and ENG broadcasters for years, most recently debuting on the field at Yankee Stadium during the World Series. Now, with major networks announcing entire programs dedicated to 3D sports and news coverage, the LiGHTBoX 3D provides a natural evolution path for crews looking to stay ahead of the game when purchasing new 3D-ready equipment.

“Over the past year we have been inundated with requests for economical fiber optic equipment capable of accommodating the high number of signals required for 3D production,” says Frank Jachetta, senior vice president of sales and operations for MultiDyne. “As our customers trust us with all of their fiber optic needs, we configured the LiGHTBoX 3D to provide them with a solution that is not only packed with more signal paths, but that is also cost-effective. Purchasing brand-new equipment suited for 3D can be extremely costly, so we really considered our customer’s bottom line when creating the LiGHTBoX 3D.”

With more signal paths for HD video, audio and data, the LiGHTBoX 3D can be configured for even the most complicated 3D shoots. Fully customizable and offering virtually any signal configuration, the LiGHTBoX 3D can also be linked via tactical fiber cable to the MultiDyne DVM-2500, HD-1500, HD-3000 and HEMC-4000.

Providing a high-quality signal throughput and the opportunity to integrate almost any solution from the MultiDyne product line, including the new DVI-6000 and COMMS-2000 products, the LiGHTBoX 3D system offers users endless possibilities and flexibility. Further, the LiGHTBoX 3D solution is equipped with an extremely rugged case, making it highly weatherproof for outdoor and remote location broadcasting.

For more information on MultiDyne’s LiGHTBoX line of products and customization options, please visit MultiDyne at booth C7637 or at www.multidyne.com.

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LOCUST VALLEY, NY/LONDON, DECEMBER 18, 2009 – MultiDyne Video & Fiber Optic Systems, a premier provider of fiber optic-based video and audio transport and routing solutions for broadcast and pro A/V applications, is loading up UK’s One Box Television with its  SilverBULLET Mini 3G HD/SDI fiber optic link. One Box Television, an innovative UK multi camera gallery facilities rental company, purchased the extremely lightweight, tiny transmitter and receiver modules through MultiDyne’s exclusive distributor in the UK, Bright Space Technologies.

With recent rentals to premier broadcast networks including the BBC, West End Productions and large corporations like Sony, One Box Television was looking to upgrade its equipment to further incorporate the most sophisticated HD solutions on the market into its custom-made, “One Box” broadcast rental system. As the system is used for remote productions, One Box Television selected the SilverBULLET 3G fiber optic links for their ability to transport 3G signals over long distances on a single mode of fiber, their ease of portability and their extremely compact size.

“By combining the SilverBULLET modules with our other technology, the on-camera boxes now allow full vision control of HD cameras over 100 metres, as well as feeding time code, talkback and reverse vision,” says Richard Stevenson, founder of One Box Television. “The product revolutionizes the stability of our pictures, and has allowed much longer cable runs than were previously available to us over coax cable.”

Designed for quick and easy installation, the SilverBULLET supports transmission across SMPTE 424M 2.97 Gbps, SMPTE 292M 1.485 Gbps and SMPTE 259M 270 Mbps standards regardless of format. The transmitter modules also include equalization for long lengths of coaxial cable, further easing the installation process as users can incorporate the SilverBULLET at any point in the HD/SDI chain. With error free pathological pattern operation, low system jitter and embedded audio support, the SilverBULLET provides a typical link distance of up to 30 km (18.6 miles).

“The SilverBULLET is an ideal addition to London’s One Box Television’s existing custom rental package,” says Frank Jachetta, senior vice president of sales and operations for MultiDyne. “We’re pleased that companies from around the world look to Bright Space Technologies and MultiDyne to provide state-of-the-art equipment for their system upgrades, and as rental companies look for new ways to stay ahead of their competitors in 2010, they can rely on our full product line to provide the most cost-effective, reliable and long-lasting products on the market.”

News 1080p over fiber, 3G HD, 3G HD over fiber, Bright Space, BrightSpace, copperhead, fiber, HD over fiber, hd-sdi, LiGHTBoX fiber link for HD camera, MultiDyne Dealer, SDI over fiber, telecast fiber, Telecast fiber alternative

MultiDyne Video & Fiber Systems, a leading provider of video and fiber optic based transport and routing systems, will be introducing a number of groundbreaking new products at this year’s HD World (Booth 942), the fall’s premier conference and exhibition for media and communications technology, held from October 14 – 15 at the Jacob K. Javits Convention Center, NYC.Now, here’s a preview of what’s new, including: new openGear solutions, new accessories for the SilverBULLET, new features for the DVI-6000 and EOS-4000, HDMI-ONE DVI/HDMI Fiber Link with HDCP, HD-3500 3G Video with Audio and Data, COMMS-2000 two to four Wire Intercom Bridge, and Route and Send Your Video Farther…                            …with Light Solutions from MultiDyne       Best Regards, The MultiDyne Team Matt Watkins, Inside Sales Manager mattw@multidyne.com Frank Jachetta, SVP of Sales frankj@multidyne.com � Jim Jachetta, SVP of Engineering jimj@multidyne.com MultiDyne® Video & Fiber Optic Systems Toll Free US:   1-888-332-6779 International: +1-516-299-8293         MultiDyne, LiGHTBoX and the MultiDyne logo are registered trademarks of Multidyne Electronics Inc.            Another big announcement: MultiDyne has introduced Significant Pricing Reductions across our entire HD-SDI fiber optic product line specifically the HD-1500 1.5G Multirate HD-SDI Fiber Link; SilverBULLET mini 3G Multirate HD-SDI Fiber Link with Power Supply and Pelican style case and the HD-3100 3G Multirate HD-SDI Fiber Link.  This is the result of negotiating better pricing across the board with all of our vendors and suppliers. Fiber-Comms Intercom Fiber Link. Please stop by Booth 942 to see the rest. See you at the show!     DVI-6000 DVI, VGA & Component, Single & Dual Link Transport    NEW Features With the MultiDyne DVI-6000 fiber optic transport link, easily connect your video walls and control rooms with remote video processing equipment, while maintaining the highest video quality.  The DVI-6000 transports DVI-I, RBG-HV and DVI-D signals up to WQXGA 2560 x 1600 over a single fiber and 3G SMPTE infrastructure. Click here for more information on the DVI-6000       HD-4400 4 Ch. 3G HD-SDI Fiber Optic Transport with 4×4 Matrix for openGear Plus Other Surprise Additions to the openGear Family This high density, multirate, 3G HD–SDI SMPTE fiber optic transport system with a 4×4 matrix on both the transmitter and receiver is one of the first products MultiDyne has designed as part of our participation in the openGear terminal equipment platform group.  We also have several exciting announcements to share!  Stop by Booth 942 for the latest details. Click here for more information on openGear       Electro-Optical Matrix Routing Switcher for Transparent, Point to Multi-point Switching NEW Features The EOS-4000 Electro-Optical Matrix Routing Switcher is a versatile, multi-purpose, non-blocking, transparent solution that provides high-speed routing of any format of digital fiber optic signals. The EOS-4000 series is capable of switching digital signals up to 10 Gbps. Matrix sizes are scalable starting at 16 x 16 up to 288 x 288.  Now available with 3G SMPTE Reclocking IO Blades.    Click here for more info on Fiber Optic Routing Switchers   HD-3500 HD-SDI, Audio and Data Fiber Link NEW Features The HD-3500 fiber optic transceiver supports a multirate 3.0 Gbps HD-SDI video signal with capability for four analog audio or two AES audio channels.  The system also supports bidirectional stereo audio for intercom with bidirectional RS-232 and RS-422 data capability.  Click here for more information on the HD-3500 Series         Fiber-Comms Intercom Fiber Optic Link The MultiDyne Fiber-Comms is a fiber optic extender for four-wire intercom. When used in conjunction with a two-wire to four-wire converter, such as the ST Model 45, two-wire intercom can be extended. The Fiber-Comms can transport from one to eight intercom or IFBs. The Fiber-Comms includes an XLR cable can be ordered to mate with Studio Technologies®, RTS or ClearCom® systems. The Fiber–Comms will transport control data as well. Click here for more information on the Fiber-Comms         News      MultiDyne Helps Casino Create Visual Oasis     the ibc daily – Breaking the Constraints of Transport       MultiDyne Debuts LiGHTBoX™ Fiber Optic Field Transport System Now with DVI over 3G       Follow MultiDyne on your Favorite Social Network          Hot Products        Included Accessories for SilverBULLET ™ mini 3G HD Fiber Link NEW Price, $749/end       MultiDyne Routes Information over Fiber Faster with EOS-4000 Series 3G SMPTE Switchers          Trade Shows & Events        12th Annual GV Tech Expo 2009 Conference: December 1 – 3, 2009 Exhibits: December 2 – 3, 2009 Booth # 615 Walter E. Washington Convention Ctr Washington, DC.

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SilverBULLET miniature, multirate, 3G HD-SDI fiber optic link

New Three-Inch Modules Offer the Industry’s Broadest Range of Digital Rates

ORLANDO, FL, JUNE 17, 2009 – MultiDyne Video & Fiber Optic Systems, a premier provider of fiber optic-based video and audio transport solutions for broadcast and pro A/V applications, is introducing the SilverBULLETTM Mini 3G HD/SDI fiber optic link at InfoComm 2009 (Booth 4629). This two-part, transceiver/receiver solution, designed for the transmission of SDI and HD-SDI TV signals over a single-mode fiber optic cable, maintains the signal quality that broadcasters demand – 5 Mbps to 3 Gbps. At just three inches in length, this cost-effective solution is ideal for a wide variety of pro A/V and broadcast applications, including video production and editing, ENG with additional uses for sports teleproduction, field production, remote camera links, cross-campus production, pre-fibered venues and courtesy feeds.

The tiny transmitter and receiver modules are portable, lightweight solutions for remote productions. Utilizing LED indicators to digitally display critical system diagnostic information including the Power On, HD/SDI signal presence and Received Optical Power levels, the SilverBULLET eliminates the need for the weight of additional test equipment. With error free pathological pattern operation, low system jitter and embedded audio support, the SilverBULLET provides a typical link distance of up to 18.6 miles (30 km).

“An economical solution for the fiber optic transport of 5 Mbps to 3 Gbps HDTV signals, the SilverBULLET is one of the broadcast industry’s smallest media adaptor solutions with the broadest range of digital rates,” says Jim Jachetta, senior vice president of engineering and product development. “It is a must-have for production at any location because it is a mobile solution that provides reliability and efficiency, all while continuing to meet our users’ high expectations for signal quality.”

Designed for quick and easy installation, the SilverBULLET supports transmission across SMPTE 424M 2.97 Gbps, SMPTE 292M 1.485 Gbps and SMPTE 259M 270 Mbps standards regardless of format. The transmitter modules also include equalization for long lengths of coaxial cable, further easing the installation process as users can incorporate the SilverBULLET at any point in the HD/SDI chain. Built for high durability, the SilverBULLET features an over-molded construction with a rugged “ST” simplex optical interface and 75 Ohm BNC (male) simplex electrical interface.

The SilverBULLET is compatible with any DC voltage from 5 to 16 volts with a four pin XLR. The jack also provides for SNMP monitoring, a critical component to network management.

About MultiDyne:

For more than 30 years, MultiDyne has been a leading provider of innovative and outstanding video and fiber optic-based transport systems for the broadcast, cable, satellite, production, digital cinema, pro A/V, corporate, retail, surveillance, teleconferencing, judicial arraignment, transportation, government, military, and healthcare markets. MultiDyne’s fiber optic transport systems for video, SDI, 3G HD, DVB/ASI, VGA, DVI, HDMI, audio, AES, Ethernet, data, CATV, as well as the company’s other broadcast accessories are used worldwide by such industry leaders as ABC, CBS, NBC, CNN, RAI, BBC and the Department of Transportation. MultiDyne provides a seven-year warranty on its core product line. For more information, call MultiDyne at 1-877-MULTIDYNE or 1-516-671-7278, visit the company’s Web site at www.multidyne.com, or send an e-mail to sales@multidyne.com.

# # #

Media Contact:

Kate Lee

D. Pagan Communications, Inc.

631-659-2309, ext. 21
katel@dpagan.com

Company Contact:

+1 (516) 671-7278, Ex 302

marketing@multidyne.com

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Photonic Fiber Optic Switcher

The first is 100% optical switching using 3D MEMMS Technology.  It uses electronically controlled mirrors to route optical signals.  This type of switch has an Optical input, an Optical cross-point and an Optical output.  The abbreviation for this technology is OOO.  An OOO switch provides only Point to Point switching.  One input can not be multicast to many outputs.  The mirrors can not point to more than one output at a time.  The use of mirrors does permit multiple wavelengths in both directions.  Switches are available is sizes from 8 by 8 to 256 by 256.  Pure optical switching is available for Multimode and Singlemode applications.  Optical switching supports both analog and digital optical signals.

Pure optical switching is performed using 3D micro-electro-mechanical mirror (MEMS) arrays.  Tiny mirrors are fabricated out of silicon.  The mirrors are positioned and controlled with electrostic charges.  The core of the optical switch is a one inch square cube.  The cube has an array of up to 256 input fibers on the left side as shown in figure 33.  Each fiber has a lens that focuses the optical light onto a MEMS mirror.  Each input has its own mirror.  On the right side is an array of output fibers.  Each output has a MEMS mirror.  An optical connection is made when one input mirror aligns with one of the output mirrors.

FIGURE 33 Three dimensional MEMS pure optic switching element.

3D MEMS Pure Optic Switching, Figure 33

Fiber Optic Switching is ideal for video broadcast, production, security and other video applications requiring transmission, switching and replication of high quality optical signals.  The Fiber Optical Switcher revolutionizes how video is distributed and managed. It is based on sate-of-the-art field proven photonic switching technology. Laser light is switched in a pure optical format, without electrical conversion, allowing it to support transparent connections compatible with any video or data format including uncompressed HD video at 1.5 Gbps.  Also, since the switching is done optically, the switch eliminates video degradation. With a traditional electrical switcher, Electrical to Optical (EO) and Optical to Electrical (OE) conversions are required which cause signal degradation and jitter.

An optical switch supports a wide range of formats from 19.4 Mbps ATSC through 3.0 Gbps HDTV as well as NTSC, PAL, SECAM, SMPTE 259M Serial Digital (SDI) Video, broadband analog, DVI, HDMI, RGB, VGA, component, L-Band, IF, and many more. The optical switcher will also transparently switches CWDM and DWDM signals.

Optical switcher technology can be used in the field to support applications requiring reliable, high-quality video distribution such as Mobile production trucks, sports venues and professional video facilities; Campus video and surveillance networks; Remote video monitoring as well as Government and military.  Optical layer protection and fault tolerant switching can be configured for mission critical, non-stop applications.

Optical switching is extremely cost effective for any applications requiring thirty-two or more switched optical ports. It eliminates the need for expensive video transceivers to convert signals between electrical and optical formats. Switching the signals in optical format can save thousands of dollars per port in fiber optic transport equipment costs.

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Applications for Video Fiber Optic Transport

There are many applications for fiber optic communications.  Any application that requires high bandwidth or high bit rate communications is ideally suited for fiber optic transport.  The Television and Video industries are a perfect application for fiber optic transport.  Analog television is a relatively high bandwidth signal of more than 5 MHz.  Digital television or HDTV has bit rates of more than 3.0 Gbps.  High resolution computer graphics can have a bandwidth exceeding 165 MHz.  All of these television and video applications are ideal for fiber.

Broadcast Television Transmission

As mentioned earlier, television production and broadcast engineers have always sought out the best technology for media events such as the Olympics.  In the mid-80’s, fiber optic transport was introduced into the television industry.  Since that time that has been no looking back.  Fiber optics are used in all aspects of production and distribution of video and audio signals.

The state of the art for the transport of analog video is to use 12 bit video digital encoding.  The serial digital bit rate can vary from about 144 to 300 Mbps.  Please see the photo in figure 17 of a typical analog video and audio fiber optic link.

With the introduction of digital video in the 90’s, fiber optic transport continued to enjoy growth in the broadcast industry.  Digital video was encoded into 144 to 360 Mbps. These high bit rate video signals could only travel over copper up to about 300 meters.  Transport distance beyond 300 meters required fiber.

The transitioning to 100% digital or high definition television has created a need to transport signals with a bit rate as high as 3.0 Gbps.  High definition television or HD-SDI in its native or uncompressed from is 3.0 Gbps.  HD-SDI can only reach about 150 meters over a coax.  Once again, fiber is the only choice to reach distances beyond 150 meters.

Systems can be designed using many of the technologies described above.  We can mix analog and digital signal transport.  We can combine signals using Time-division and Optical multiplexing.  Figures 22 through 23 show typical applications.

Studio to Transmitter Fiber Optic Link, Figure 22

In the example in figure 22 we see a typical application of a Studio to Transmitter Link or STL.  A broadcast television station may typically reside in a downtown metropolitan area.  The television transmitter and satellite up and down links may be on a distance mountain top out side the city. This situation is a perfect application for fiber transport.  The system may require both analog video and digital video since the station may be in the midst of their conversion from analog to digital broadcast.  They will require signals in both direction to support downlink satellite video.  The diagram above shows a system with an eight channel CWDM and a variety of fiber optic transport links supporting analog video and audio as well as digital video in both directions.

Fiber Optic Trunking, Figure 23

The diagram in figure 23 shows an application where many channels of video and audio are combined together over one fiber for back-haul feeds, cable television, common carrier or Telco.   The system uses time-division multiplexing or TDM to combine groups of 8 channels of video with audio into single wavelengths.  The optical multiplexing or CWDM technology is used to combine the wavelgths with groups of 8 videos onto one fiber.  The combined technique of TDM and CWDM provides a  fiber transport capacity of more than 144 video channels on ONE fiber.

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Digital in the Television and Video Industries

A digital signal can mean different things to Video and CATV engineers, causing much confusion. The most common types of digital video and digital audio are as follows:

Uncompressed digital video and audio

Lossless compression of digital video and audio

Lossy compression of digital video and audio

Complex digital modulations schemes such as 64 QAM, 256 QAM, 16 VSB, 64 QPSK, etc.

SONET, ATM or other telecom base standards.

Serial digital interface or SDI

High definition or HD-SDI

Digital Audio or AES/EBU

The process of digitizing a standard NTSC video signal is straight forward.  The typical bandwidth of a video signal is 4.5 MHz.  Typically a sample rate of four times the video bandwidth is used or about 18 Mega samples per second.  The analog to digital converter or A/D typically have a sampling resolution of 8, 10 or 12 bits. This process generates a serial digital data stream of about 144 Mb/sec to 270 Mbps.  The video signal is typically encoded in a digital format at the video source or in the video camera.  Depending of the digital video format, the analog video will be samples at about 13.5 Mega samples per second and then encoded in one of several standards such as 4:2:2, 4:1:1 or 4:2:0.  While these encoding schemes are not referred to as compression, they omit or remove certain information to reduce the systems bandwidth requirement.  In the encoding schemes above, the three digits refer to the three common components of video.  The first component is luminance (Y) or the light intensity of the video signal.   The second is the color signal of red minus luminance or R-Y.  The third component is the color signal of blue minus luminance or B-Y.  These three components are referred to as YUV.  The numbers 4:2:2 have to do with the fact that twice the bandwidth is used for the Luminance (Y) channel than the two color channels. This technique is a form of compression that will be addressed later in the chapter.  HDTV or high definition video requires a data rate of 1.485 Gbits/second for one uncompressed signal.

The most efficient means of analog video transport utilizes analog to digital conversion.  Once video and audio signals are converted to digital information, many channels can be combined into one high speed data stream using Time-Division Multiplexing or TDM.   The high speed serial digital data stream is then converted to light via a laser or LED.  The block diagram below in Figure 19, shows the building blocks of an 8 channel video fiber optic transmitter.
Figure 19

The receiver unit performs the reverse function as shown in figure 20 The light or optical signal is received by a PIN photo detector. The optical signal is converted back into a serial data stream.  The data stream is de-multiplexed using TDM.  The digital data is then converted back to video and audio via digital to analog D/A converters.

Figure 20

Digital video transmission has many advantages over analog transmission.  Analog fiber optic system requires high linearity optical components that are expensive and require fine tuning and complex calibration procedures.  Once a video or audio signal has been digitized, it can be transported via fiber using readily available digital telecom optical components for both Multimode and Singlemode applications.  A digital system has a higher immunity to noise and superior performance characteristics compared to an analog system.  A digital signal can be regenerated and repeated virtually indefinitely without signal or performance degradation.

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	04/20/2009 NAB Show 2009
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