wiredinUSA November 2014

INDEX

signals with bit rates up to 21.6Gbps over cable lengths of up to 15m. The cables support uncompressed DisplayPort resolutions up to 4096x2160/60Hz. Long distance transport of high-resolution DisplayPort signals over copper cables faces several challenges, such as insertion loss, differential skew and jitter. Insertion loss is caused by cable capacitance, which acts as a low-pass filter, blocking higher frequency signal components from passing. Skew occurs when the differential DisplayPort signalsgetdelayedandbecome out of phase as they pass over a long cable. Both factors contribute to increased digital jitter, which degrades the performance of the cable. This jitter becomes more severe with higher resolutions, higher bit rates and longer cable distances. Conventional cables that support lower resolutions at short distances are often unable to support the data rates required by higher resolutions at longer distances. The resulting video can be disrupted by visual artifacts or may not be visible at all. To overcome these challenges, DVIGear's HR™ series DisplayPort cables are constructed using robust, heavy gauge 24AWG copper wires for durability. The heavier wire gauge has increased cross-sectional cable area, as well as decreased capacitance and lower differential skew, allowing high speed signals to pass with minimal jitter. These features enable cable lengths of up to 15m with full compliance with DisplayPort 1.2 signal parameters.

said Jeet Sanyal, engineering manager, Molex. “Temp-Flex FEP cables were specifically designed for the most severe environments, yet they remain extremely flexible, making them ideal for today’s smaller more rugged applications including flight data recorder boxes, missile systems and robotics found in manufacturing plants across multiple industries.” Temp-Flex FEP flat-ribbon cables are durable in temperatures ranging from -65ºC to +200°C. They are resistant to acids, alcohols, aldehydes, bases, esters, hydrocarbons (aliphatic, aromatic, and halogenated), ketones and oxidizing agents. An extruded cable encapsulates each conductor with insulation that will not delaminate, while the low-loss dielectric constant (2.1) ensures the optimum signal transmission with minimal loss. Molex Incorporated used October’s military communications conference, MILCOM 2014, to highlight its hermetically sealed multi-fiber circular MT optical assemblies. For extreme sealing performance in a small footprint, the new sealed multi-fiber circular MT optical assemblies are said to provide system reliability in extreme environments, including severe weather conditions, high altitudes and high atmospheric pressures. These conditions can cause ordinary surveillance and sensor equipment to fail, and so create critical communications problems. Optical assemblies

in connectors and cabling,” said Derrick Stikeleather, OCC product design engineer. The OCC Category 8 field installable plug uses the same shielded housing used in the company’s Category 6A shielded field installable plug, a design that enables simple terminations without specialized tools. Molex Incorporated’s Temp-Flex ® FEP flat-ribbon cable is thought to be the only FEP solutiononthemarketthatmeetstheMIL-spec requirement for M49055/11 & M49055/12 for harsh environment applications. Unlike competitive PVC (polyvinyl chloride) and TPE (thermoplastic elastomers) products, Molex offers extruded FEP (fluorinated ethylene propylene) dielectric insulation material for a high performance ribbon cable that can withstand exposure to chemicals, extreme temperatures, abrasions and flexion. Military ribbons

Hermetically sealed multi-fiber circular MT optical assemblies

Mark Matus, global product manager at Molex, explained that hermetic sealing can address this problem, but: “Hermetic sealing for fiber optic connections has historically been limited to large, single-channel applications and until now was unavailable in a high-density, reduced-footprint, multi-channel option. “The hermetic-sealed multi-fiber circular MT optical assemblies, which are designed for critical use applications where long-term system reliability in harsh environments is critical, ensure industry-leading gas-tight sealing for superior performance.” The new assemblies contain 12 to 24 fibers in one connector, compared to competitive products that utilize discrete-fiber (one fiber per contact) connector designs. The assemblies are appropriate for applications that require optimal environmental and pressure sealing capabilities, such as aerospace and defense, mining, oil and gas exploration, industrial process control, and medical. They can operate in temperatures ranging from -40° to 158°F (-40° to 70°C).

MIL-spec requirement for M49055/11 & M49055/12 for harsh environment applications

High performance copper cables

“Signal failure has long been prevalent in military, aerospaceand industrial equipment applications due to the limited capability of PVC and TPE cables, which can degrade after repeat exposure to harsh conditions,”

DVIGear has announced the availability of High Resolution™ DisplayPort copper cables, designed to transport DisplayPort

wiredInUSA - November 2014

wiredInUSA - November 2014

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