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MIL-STD-1553 PMC Card

The BU-65596F/M, a MIL-STD-1553 PMC card from Data Device Corporation (Bohemia, NY), uses DDC’s Enhanced Mini-ACE® ASIC core. The BU- 65596F/M incorporates Total-ACE® integrated terminals and includes over 62 million hours of in-service history. The high-MTBF, DO-254-certifiable card has up to 4 MIL-STD-1553 channels and 16 avionics discrete I/O, and is VITA 47 Class V3 rated for rugged environments.

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Digital Oscilloscope

Rigol Technologies (Oakwood Village, OH) has introduced the DS6000 series digital oscilloscope, featuring up to 1 GHz bandwidth, 1.5 GHz bandwidth differential, and single-ended active probes. The digital oscilloscopes use advanced waveform search, visualization, and replay to detect signal and device characteristics.

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Event-Driven Processor Programming

Almost since computers were invented, interrupts have been a common programming method to deal with real-time tasks. An interrupt causes a processor to stop the running task, and to execute an interrupt handler instead. The interrupt handler determines the cause of the interrupt, responds to the interrupt, whereupon control is restored to the original task. A simple example is an interrupt from a UART (a serial port) stating that a character has been received, and the interrupt handler will take the character from the UART and store it in a queue in memory for use by the main task.

Posted in: Articles, Articles, Electronics & Computers
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Extensible Processing Platforms: Giving Designers the Best of Both Worlds

Creating a new field programmable gate array is no small feat. FPGA vendors spend tens-of-thousands of man-hours simply researching markets to determine the feature set a given device will require and the silicon process that they will use to manufacture the device. This starts years before they embark on the ever more difficult task of actually designing the IC and the software to allow users to program it.

Posted in: Articles, Articles, Electronics & Computers, Design processes, Integrated circuits
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Choosing a Capacitor for Use as a Switch-Mode Power Supply Filter

Input filter caps need to be able to supply a quick burst of energy and to suppress noise generated in the switch circuit. Important considerations for the input filter cap are ESR, ESL, and ripple current. High CV density is preferred in the input filter caps to reduce board space, although it is more critical for the output filter caps.

Posted in: Articles, Aerospace, Electronic Components, Power Management, Power Supplies, Capacitors, Switches, Parts
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Inside the Navy’s Quiet Water Tunnel Facility

When water flows over an acoustic sensor, non-acoustic pressure fluctuations caused by turbulence can decrease the signal-to-noise ratio and make it difficult to sense incoming acoustic waves. The Quiet Water Tunnel Facility at the Naval Undersea Warfare Center in Newport, RI is a unique test facility capable of investigating these pressure fluctuations and evaluating new and existing technologies aimed at reducing flow noise and drag due to skin friction. These technologies include modifications to the surface itself, such as riblets or compliant coatings, or modifications to the flow, such as suction or injection of water into the boundary layer.

Posted in: Articles, Aerospace, Water, Acoustics, Test facilities, Marine vehicles and equipment
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Modern Military Energy Storage Technology

The risk of human casualties associated with fuel convoys, combined with the long-term cost issues of unreliable technologies, has the military exploring greener, more sustainable options with the goal of increasing energy efficiencies, lowering fuel consumption, and lessening the risk of lost lives. Advanced battery technology continues to be validated as a viable solution to lowering fuel demands. For example, today’s advanced energy storage systems can store energy from portable solar arrays to power essential electronic systems at forward operating bases (FOBs) — instead of using a vehicle’s idling engine power or diesel generators — significantly reducing fuel consumption, costs, and risk.

Posted in: Articles, Aerospace, Batteries, Energy storage systems, Military vehicles and equipment
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Spectrally Compliant Waveforms for Wideband Radar

Modern radars often require the use of wideband waveforms to perform high-resolution target imaging. In microwave systems, the bandwidth can be on the order of 1.5 GHz, while in UHF systems that typically operate between 200 and 500 MHz, the waveform bandwidth might exceed 200 MHz. A major issue in the operation of such systems is that they often overlap the spectrum used by other radars, and even the spectrum allocated for other types of systems such as communications and navigation devices.

Posted in: Application Briefs, Radar, Waveguides, Noise
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New Energy Source Powers Single-Use Mil/Aero Equipment

Until recently, single-use high energy devices were typically powered by reserve/thermal batteries using decades-old technology. Recognizing that battery performance limitations could hinder new product development, the U.S. DoD identified a “critical need” for a new generation of high-power, long life batteries.

Posted in: Application Briefs, Defense, Batteries, Research and development, Reliability
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Chemically Bonded Phosphate Ceramics Stop Corrosion

Corrosion of steel, aluminum, and other structural metals erodes the safety and financial stability of industries and countries alike. Fighting corrosion in ships, tanks, planes, and equipment costs the Pentagon $22.9 billion a year. Corrosion costs advanced industrialized nations about 3.5% of GDP to replace damaged material and components, plus a similar amount due to lost production, environmental impact, disrupted transportation, injuries, and fatalities.

Posted in: Application Briefs, Ceramics, Corrosion, Steel
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