ViaSat MD-1366 DISA Certified EBEM SATCOM Modem Establishes New High Throughput Exceeding 200 Mbps On XTAR Satellite

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ViaSat Inc. (Nasdaq:VSAT) demonstrated its DISA certified MD-1366 Enhanced Bandwidth Efficient Modem (EBEM) to members of the U.S. Navy satellite team at the Space and Naval Warfare Center located in Charleston, SC, showing how the modem dynamically adjusts its modulation and coding for optimum performance and includes automatic antenna handover to achieve industry leading data throughput. The combination of ViaSat EBEM modems, an L-3 Communications NARDA Satellite Networks 3.9 meter Ground Multi-band Terminal (GMT), and the XTAR LLC high-powered steerable-beam satellite makes the high level of performance possible.

    Working with L-3 NSN and XTAR, ViaSat presented off-the-shelf capabilities that can solve the U.S. Navy need for improved throughput to surface ships. The newly DISA-certified U.S. Army and U.S. Navy standard EBEM demonstrated individual terminal throughput rates ranging from 50 Mbps to 155.52 Mbps. The demonstration also showed the value of the advanced QPSK, 8-PSK, and 16-APSK modulations and Turbo codes (MIL-STD-188-165B pending) that enable the EBEM (operating at 16-APSK R=7/8) to achieve 205 Mbps total capacity on a single XTAR transponder, the highest capacity ever achieved on a 72 MHz X-band transponder.

Two innovative functions are important keys to the new level of performance achieved by the ViaSat EBEM.

Information Throughput Adaptation (ITA) increases available throughput by converting power margin, typically reserved for overcoming adverse weather conditions, directly to increasing data rates in normal conditions to achieve vastly higher throughputs than available in MIL-STD-165A and other COTS modems. ITA provides automatic, seamless adjustments in modulation and coding to maximize performance even during adverse weather conditions. The system data rate rises as downlink power increases, and automatically falls back as downlink power decreases. During the demonstration, the EBEM showed its seamless, error-free adaptation to data rates from 28 to over 155 Mbps without operator intervention. This powerful feature will be especially useful for the Navy when the new Wideband Global SATCOM (WGS) satellites come on-line.

Automatic error-free antenna handover (AH) is critical to U.S. Navy shipboard applications for maintaining communication synchronization with the satellite during maneuvers as the ship terminal switches antennas to maintain a constant view of the satellite.

The ViaSat MD-1366 EBEM modem is the new FDMA (Frequency Division Multiple Access) standard and next state-of-the-art modem to support the communications, command, and control requirements of today's highly mobile, joint U.S. forces using military and commercial satellites at C-, X-, Ku- and Ka-band frequencies. In addition, the MIL-STD-188-165 Working Group plans to incorporate the advanced features and capabilities of the MD-1366 EBEM into MIL-STD-188-165B that will supersede MIL-STD-188-165A.

The demonstration included the L-3 Communications NSN GMT System and 3.9 Meter transit-case antenna. Housed in a weatherproof transit case, the 3.9 meter Lightweight Medium Aperture Antenna (LMAA) is designed for repeated worldwide tactical deployment. To learn more about L-3, please visit

The high powered XTAR steerable beam transponders allow all users, including those with small and/or legacy terminals to receive and transmit data at higher rates than previous X-band satellites. Visit for more information.

About ViaSat (

ViaSat produces innovative satellite and other digital communication products that enable fast, secure, and efficient communications to any location. The Company provides networking products and managed network services for enterprise IP applications; is a key supplier of network-centric military communications and encryption technologies to the U.S. government; and is the primary technology partner for gateway and customer-premises equipment for consumer and mobile satellite broadband services. The company's four wholly owned subsidiaries, US Monolithics, Efficient Channel Coding, Enerdyne Technologies, and Intelligent Compression Technologies, design and produce complementary products such as monolithic microwave integrated circuits, DVB-S2 satellite communication components, video data link systems, and data acceleration and compression products. ViaSat has locations in Carlsbad, CA, and Duluth, GA, along with its Comsat Laboratories division in Germantown, MD. Additional field offices are located in Boston, MA, Baltimore, MD, Washington DC, Australia, China, India, Italy, and Spain.

Safe Harbor Statement

Portions of this release, particularly statements about the performance and deliveries of ViaSat products and technology, may contain forward-looking statements regarding future events and are subject to risks and uncertainties. ViaSat wishes to caution you that there are some factors that could cause actual results to differ materially, including but not limited to: contractual problems, product defects, manufacturing issues or delays, regulatory issues, technologies not being developed according to anticipated schedules, or that do not perform according to expectations; and increased competition and other factors affecting the telecommunications industry generally. The Company refers you to the documents it files from time to time with the Securities and Exchange Commission, specifically the section titled Risk Factors in the Company's Form 10-K, which contain and identify other important factors that could cause actual results to differ materially from those contained in our projections or forward-looking statements. Stockholders and other readers are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date on which they are made. We undertake no obligation to update publicly or revise any forward-looking statements.

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Joe LoBello
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