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www.mrcy.com INNOVATION THAT MATTERS ® Corporate Headquarters 50 Minuteman Road • Andover, MA 01810 USA (978) 967-1401 • (866) 627-6951 • Fax (978) 256-3599 The Mercury Systems logo and the following are trademarks or registered trademarks of Mercury Systems, Inc.: Mercury Systems, Innovation That Matters, Air Flow-By. Other marks used herein may be trademarks or registered trademarks of their respective holders. Mercury believes this information is accurate as of its publication date and is not responsible for any inadvertent errors. The informa- tion contained herein is subject to change without notice. Copyright © 2019 Mercury Systems, Inc. 8012.00E-wp-0719-comp-openvpx Which one is best? Both Air Flow-By and Air Flow Through both deliver excellent air-cooling capabilities, with Air Flow-By becoming the stronger performer as systems gain in size or larger (6U+) form-factors. Both cooling technologies are fully complimentary to the OpenVPX standard ecosystem and have their own VITA standards. Air Flow-By has the advantage of having full design packages available to VITA members via the organization's website for low risk, rapid development cycles. Key differences between the technologies comes down to SWaP- / EMC- performance, system size/form-factor, availability, scalability and track record. SWaP / EMC Both cooling architectures use sealed modules, with Air Flow-By having an advantage with better environmental protection, fuller EMC protection, and uses standard IEEE1101.10 injectors/ejectors for ease of module access making them good 2LM line replacement units (LRUs) with better system EMC performance System size / form-factor The higher back pressure of Air Flow Though impedes its ability to cool larger systems. As such, Air Flow-By is the stronger performer for larger systems and form-factors. Availability Air Flow-By uses a machined/additive fabrication process that is characterized with shorter leads times and is inherently more versatile than Air Flow Through. The Air Flow Through formed fin approach is more difficult to modify, has longer lead-times and requires dedicated tooling. Scalability Air Flow-By is similar to other OpenVPX conduction- and liquid-cooling architectures which is enabling it to breakdown technology barriers, scale across applications and is motivating an increased standardization and interoperability across the industry as a whole Proven Air Flow-By has been deployed by numerous manned and unmanned air programs of record giving it the highest technology readiness level of 9 (TRL-9). Additional OSA compliance – SOSA Air Flow Through is recognized by SOSA and Air Flow-By is currently being considered by the Open Systems Group for similar recognition. Table of Acronyms 2LM Two level Maintenance ANSI American National Standards Institute CMOSS Common/C4ISR/EW Modular Open Suite of Standards - Includes VICTORY, RedHawk and MORA DOE Design of Experiment FPGA Field Programmable Gate Array GPGPU General Purpose Graphics Processing Unit OSA Open Systems Architecture MOSA Modular Open Systems Architecture MRL Manufacturing Readiness Level RF Radio Frequency SOSA Sensor Open System Architecture for ISR (includes CMOSS) SWaP Size, Weight and Power SWaP-2C Size, Weight and Power and Cooling and Cost VITA VME International Trade Association VME Versa Modular Europa VSO VITA Standards Organization 3U, 6U OpenVPX and AdvancedTCA Air Flow-By modules

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