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The Latest in Compliance Engineering Products and Services • 2005 EMC Update

Shielding Gaskets

EMI, RFI, and environmental gaskets offer affordability and quality for high-performance applications. A unique spiral design meets demands for low compression set, long life, and high shielding. Gaskets meet requirements including FCC, EC, HIRF, Tempest, and RoHS. Configurations are available in groove and surface-mount options. Diameters measure from 0.034 to 1.5 in. Spira Manufacturing Corp., North Hollywood, CA; tel: 818-764-8222; fax: 818-764-9880; e-mail: sales@spira-emi.com; Internet: www.spira-emi.com.

EMC Compliance

A company is an A2LA-accredited electromagnetic compatibility (EMC) center for worldwide regulatory compliance. Component and subassembly testing is provided along with full vehicle testing. Anechoic chambers are available to fit all needs. The 10-m anechoic chamber can handle products up to 20 ft wide and 16 ft tall. The flush-mounted turntable spins test items up to 25,000 lb. NARTE-certified engineering assistance is provided for all EMC compliance needs. Radiometrics, Romeoville, IL; tel: 815-293-0772; fax: 815-293-0820; e-mail: info@radiomet.com; Internet: www.radiomet.com.

Amplifier

A new traveling-wave tube amplifier (TWTA) has been designed for EMC testing. Model 1000TP1G3 is a 1000/500-W pulse amplifier designed to simulate the effect of a car driving through a beam of radar. The amplifier offers the power to meet both the 600-V/m radar requirements of the Ford ES-XW7T-1A278-AC and GM3097 specifications in two discrete bands: 1.15–1.45 GHz and 2.7–3.1 GHz. Also available are two microwave horn antennas that meet the 600-V/m requirements of the above specifications. Model AT4318 operates within the 1.2–1.8 GHz range, while the AT4333 covers the 2.2–3.3 GHz range. AR Worldwide RF/Microwave Instrumentation, Souderton, PA; tel: 215-723-8181;
Internet: www.ar-worldwide.com.

High-Temperature Capacitors

Capacitors are specifically designed to withstand high temperatures for applications such as under-hood sensors and oil-exploration parts. The X8R MLCC capacitors are manufactured with an X8R dielectric material that has a capacitance variation of 15% between –55° and 150°C. Typical applications include wire-line logging tools such as gamma ray receivers, acoustic transceivers, and microresistivity measurement tools. They are available in voltages from 25 to 50 V with capacitance tolerance of ±5%, ±10%, and ±20%. Standard and automotive AEC-Q200-qualified options are available. AVX Corp., Myrtle Beach, SC; tel: 843-448-9411; fax: 843-444-2864; Internet: www.avx.com.

Bond and Coating

A company offers more than 3000 grades of adhesives, sealants, and coatings. The company's products include epoxies, silicones, polyurethanes, anaerobics, and cyanoacrylates. Electrically conductive, thermally conductive, and electrically insulative systems are available. Master Bond produces technologically advanced formulations and provides prompt technical assistance to help meet customers' needs. Master Bond Inc., Hackensack, NJ; tel: 201-343-8983; fax: 201-343-2132; e-mail: main@masterbond.com; Internet: www.masterbond.com.

Amplifiers

Low-, medium-, and high-power amplifiers are available for automotive, aircraft, military, medical, electronics, and wireless markets. Options include solid-state, traveling-wave tube, and tetrode tube amplifiers. Antennas, E-field sensors, TEM cells, and other RF and microwave accessories are also offered. The company is ISO 9001:2000 registered, and it builds in accordance with MIL-I-45208A. Instruments for Industry, Ronkonkoma, NY; tel: 631-467-8400; fax: 631-467-8558; e-mail: info@ifi.com; Internet: www.ifi.com.

Strain Reliefs

North American and international strain reliefs provide a liquid-tight seal on the power cord entry and provide extra protection for power cords. They extend cord life and reinforce the cord connection to the equipment. Dome and flex style in NPT and PG thread types are available. Interpower, Oskaloosa, IA; tel: 800-662-2290; fax: 800-645-5360; e-mail: info@interpower.com.

Dc-to-Dc Convertor

A dc-to-dc convertor is designed to provide high-quality onboard power solutions in RF power amplifier systems and other distributed power applications. The PKJ-N is DfE and RoHS compliant. Protection from output overvoltage, input undervoltage, overtemperature, and output short circuits are featured. It is 91.5% efficient at half load and 91% at full load. A ground plane keeps radiated EMI to a minimum. With 1500 V dc input to output isolation, the convertor meets isolation requirements equivalent to basic insulation according to IEC/EN/UL60950. Ericsson Power Modules, Plano TX; tel: 972-583-6910;  Internet: www.ericsson.com/powermodules.

Shelf System

Designed to meet NEBS Level III, UL/EN 60950, and EN 55024, a five-slot full-mesh shelf management system provides high reliability and easy maintenance. Features include a high-capacity push-pull cooling scheme, high-performance shelf management, and a replicated mesh backplane for 3.125 Gb/sec. The cooling scheme's advanced software control enables operation at 200 W per slot even in the event of a fan failure. Under normal operating conditions, fan speeds are reduced to provide quiet operation. If a fan fails, the other fans' speeds increase to 130% to compensate for lost airflow. The unit also includes two front and two rear removable fans trays for right-to-left airflow. Tracewell Systems, Westerville, OH; tel: 614-846-6175; fax: 614-846-4450; e-mail: sales@tracewell.com; Internet: www.tracewellsystems.com.

Frequency Divider

A self-contained four-decade frequency divider pod accepts transistor-transistor logic (TTL) clock signals up to 100 MHz and generates f/10, f/100, f/1000, and f/10,000 divided outputs. All divided outputs are synchronous with the input frequency and can be used for triggering data-acquisition systems, pattern generators, oscilloscopes, and networking and telecommunications devices. The TTL input has a switchable 50/500 W input impedance and can toggle up to 100 MHz. The four divided TTL outputs are back-matched and can drive terminated or unterminated loads. Each output delivers more than 2.2 V into a 50-W load. The unit includes an ac adapter and BNC or SMA connectors for ready-to-use convenience on the bench or in a system. Pulse Research Lab, Torrance, CA; tel: 310-515-5330; fax: 310-515-0068; e-mail: sales@pulseresearchlab.com; Internet: www.pulseresearchlab.com.

Power and Control Systems

Ac power distribution and control systems can be adapted for domestic and international configurations for OEMs and system integrators. The system is rack and strip mounted. It provides circuit breaker protection and EMI and RFI filtering. The system also has spike and surge protection. Remote capabilities for the system  include both a power on-off and system reboot. Emergency shutdown, redundant power, sequential power up and power down, and power regulation features are also provided. The systems are UL, cUL, CSA, CE, and T†V approved. Pulizzi Engineering Inc., Santa Ana, CA; tel: 800-870-2248; fax: 605-334-2611; e-mail: sales@pulizzi.com; Internet:www.pulizzi.com.

Micropower Convertors

Step-up dc-to-dc micropower convertors have an integrated Schottky diode and output disconnect circuitry. The LT3473 and LT3473A convertors are low-profile DFN packages measuring 3 X 3 mm and 3 X 4 mm, respectively. A constant 1.2-MHz switching frequency enables use of tiny capacitors and inductors. The micropower convertor's  internal 1-A switch delivers output of 80 mA at 25 V. Linear Technology Corp., Milpitas, CA; tel: 408-432-1900, ext. 2419; fax: 408-434-0507; e-mail: jhamburger@linear.com; Internet: www.linear.com.

Clock Synthesizer

Dual phase-lock-loop (PLL) clock synthesizers can support applications such as PC peripheral devices, consumer electronics, and embedded controller systems. The ASM3P2853A reduces electromagnetic interference (EMI) at the clock source. Spread-spectrum clocking technology can virtually eliminate EMI filter networks and ferrite beads, with an added benefit that circuit board traces can be routed more effectively, enhancing design flexibility and layout. Output of PLL is modulated to spread bandwidth and decrease the peak amps of its harmonics. System EMI is decreased. Packaged in an 8-pin SOIC, the ASM3P2853A provides a 50-MHz spread-spectrum clock and a low-jitter 48-MHz USB clock from a 25-MHz crystal source. Alliance Semiconductor Corp., Santa Clara, CA; tel: 408-855-4900; Internet: www.alsc.com.

Standard-Gain Horns

Standard-gain horn antennas are designed specifically for emissions and immunity testing within the frequency range of 1–40 GHz. Each antenna has linear polarization, medium gain, low VSWR, and constant antenna factor. They come with a tripod mount that adapts to any tripod with 1Ú4–20 male threads. Standard gain is 15 dB, but also available is 10 or 20 dB. AH Systems, Chatsworth, CA; tel: 818-998-0223; Internet: www.ahsystems.com.

Wireless Testing

RF and EMC testing can be performed for wireless products that require regulatory compliance. The laboratory is accredited to ISO/IEC 17025, and reports are accepted in more than 50 countries. Products meant for the Japanese market can be tested. MiCom Labs, Pleasanton, CA; tel: 888-642-6652; fax: 925-462 0306; e-mail: info@micomlabs.com; Internet: www.micomlabs.com.

Static-Shield Polyethylene Tubing

Polyethylene tubing on a roll is specifically designed to protect electronic components from electrostatic discharge. Metallic static-shield polyethylene tubing has been tested to meet electrical and physical requirements of MIL-PRF-81705D Type III and EIA 541 standards. The packaging is suitable for protecting electronics, switchboard apparatuses, printed circuit boards, transistors, and other sensitive components. Better Packages, Shelton, CT; tel: 800-237-9151; fax: 203-925-3705; e-mail: info@betterpack.com; Internet: www. betterpackages.com.

Metallized Gaskets

Standard d-connector metallized fabric-elastomer gaskets can shield most 9-pin through 50-pin cover connectors. Gaskets are offered in five standard sizes and in multiple material thicknesses for each size. The EMI and RFI shielding gaskets have compression set values of less than 3%. Nickel plating over a highly conductive copper substrate provides the electrical characteristics necessary for shielding effectiveness of greater than 100 dB attenuation. Metallized fabric is bonded to a low-compression-force, open-celled polyurethane foam. Suitable for telecom and computer applications, conductive-fabric gaskets are also offered in custom die-cut configurations. Tech-Etch Inc., Plymouth, MA; tel: 508-747-0300; Internet: www.tech-etch.com.

Protocol Tester Software

Two protocol testers, one for UMTS and one for GSM, can be used to develop mobile dual-mode terminals with new accompanying software. The CRTU-W and the CRTU-G are equipped with CRTU-WA03 software to design custom signaling tests that simulate different UMTS-to-GSM handover scenarios. Complex processes can be combined in macros and predefined sample scenarios to make programming more efficient. In addition to signaling, voice or data applications can also be included in the test. Both voice and data transmission can be tested. The complete system includes the CRTU-WA03 software option. Rohde & Schwarz, Columbia, MD; tel: 410-910-7800; e-mail: info@rsa.rohde-schwarz.com; Internet: www.rsa.rohde-schwarz.com.

Surge-Protection Devices

Hybrid surge-detection devices are designed as transient surge suppressors for sensitive electronic equipment. The TST and TS models are configured for either parallel or serial installation and include  EMI filtering. The surge-protection devices are line-load sensitive and interface with power cables via screw terminals (barrier strips). Wire sizes vary with unit current ratings. Each unit is self-contained in a rugged plastic enclosure and includes a red LED status indicator. Dry contacts are a standard feature on the 30- and 60-A models, and a telephony interface is an available option on the 30-A model. Meter-Treater Inc., Lake Park, FL; tel: 800-638-3788; e-mail: sales@metertreater.com; Internet: www.metertreater.com.

Testing

A company offers high-intensity radiated field-testing (HIRF) capability in a mode-tuned chamber. Mode-tuned testing is performed to meet the radiated susceptibility requirements for RTCA DO-160-D and MIL-416E. The testing capability complements the company's existing HIRF testing in an absorber-lined chamber where field strengths reach 1000–3000 V/m. The company also offers TCB and CAB certification services and combined EMC and environmental stress testing. Elite Electronic Engineering Inc., Downers Grove, IL; tel: 630-495-9770, ext. 119; fax: 630-495-9785; e-mail: sales@elitetest.com; Internet: www.elitetest.com.

Planar Resistors

A company's high-wattage, noninductive planar power resistors are designed to span from 3 to 50 Ω at 70°C. The BPC and BPR resistors are through-hole planar power devices with thick-film resistive elements on ceramic. The BPC series resistors have resistance ranges from 0.1 Ω to 200 KΩ and standard tolerances of ±1%, ±2%, ±5%, and ±10%. TCRs are 100 ppm/°C, and operating temperature range is from –55° to 125°C. Maximum operating voltage is 300 and 500 V dc with a dielectric strength of 750 V. BI Technologies, Glenrothes, Fife, Scotland; tel: +44 1592 662200; e-mail: sales@bitechnologies.co.uk; Internet: www.bitechnologies.com.

PCB Shields

High-attenuation printed circuit board shields have a fully enclosed ferrite body augmented with an internal radio-frequency absorber membrane. The shield mounts easily to circuit boards without soldering—either by pressure-sensitive adhesive pads, screws, or rivets. The shield has broadband effectiveness to 1.2 GHz for the ferrite body, with extended performance from the absorber membrane to 5 GHz. FerriShield Inc., Scranton, PA; tel: 570-961-5617; fax: 570-969-6274; e-mail: info@ferrishield.com; Internet: www.ferrishield.com.

Analog Signal Conditioners

Measuring only 1.11 X 1.65 X 0.4 in., isolated analog signal-conditioning modules provide 1 kHz bandwidth. The 8B incorporates high-performance modular I/O on a per-channel basis for any embedded monitoring or measurement and control system. A special input circuit provides protection against accidental connection of power-line voltages up to 240 V ac continuous output. Isolation, at 1500 V rms, suppresses transmission of common-mode spikes or surges. The 8B modules offer ±0.05% accuracy (including nonlinearity, hysteresis, and repeatability) and ±0.02% linearity. Operating temperature ranges from –40° to 85°C. The modules have ANSI/IEEE C37.90.1 transient protection and meet EN 61000-6-4 and EN 61000-6-2 requirements. Housed in a solid, potted thermoplastic plug-in-the-panel package with a flammability rating of UL-94 V-0, the 8B family of isolated signal conditioners is specifically designed to protect user equipment while reducing electrical noise and enabling convenient system expansion and repair. All 8B modules offer dimensional stability over temperature and excellent stability over time. They also offer chemical resistance. The modules do not require recalibration. Dataforth Corp., Tucson, AZ; tel: 800-444-7644; e-mail: sales@dataforth.com; Internet: www.dataforth.com.

Clamp-On Current Monitor

A wide-band clamp-on current monitor has a hinge-type opening and 1/2-in. aperture. The monitor measures ac current with ±1% accuracy. It operates at 25 Hz to 20 MHz, with a 3-dB bandwidth. The company offers current monitors that can watch current transients, harmonics, pulse, sine wave, and other complex waves. The typical bandwidth is from 1 Hz to 20 MHz, with accuracy of ±1% or better. Pearson Electronics, Palo Alto, CA; tel: 650-494-6444; e-mail: sales@pearsonelectronics.com; Internet: www.pearsonelectronics.com.

Surface-Mount Fuse

With a breaking capacity of 200 A at 250 V ac or 100 A at 125 V dc, a surface-mount fuse maximizes circuit protection. Measuring 10 X 3 X 3 mm, the UMT 250 can replace axial or radial lead through-hole fuses. It occupies approximately 80% less volume than a typical microfuse or 5 X 20-mm cartridge fuse. Surface-mount components provide high reliability and quality of connection to the printed circuit board. The fuse meets IEC 60127-4 and UL 248-14 and is cURus and VDE approved. Schurter Electronic Components, Santa Rosa, CA; tel: 707-636-3000; fax: 707-636-3033; e-mail: info@ schurterinc.com; Internet: www. schurterinc.com.

Inductors

A series of surface-mount radio-frequency inductors provides an alternative to equivalent military specifi-cation products. The SMRF 1010 series was specifically designed for applications in military communications, crystal oscillators, and wireless networks where military specification products have traditionally been used. The inductors have current ratings from 880 to 120 mA dc, based on a 35°C temperature rise and a 90°C ambient temperature, and inductance from 0.12 to 27 µH. Gowanda Electronics, Gowanda, NY; tel: 716-532-2234; fax: 716-532-2702; e-mail: sales@gowanda.com; Internet: www.gowanda.com.

Design Tool

A 3-D, time domain–based electromagnetic simulation design tool enables rapid and accurate designs. The Microstripes tool uses solver technology based on the transmission line matrix method, which is faster and more efficient than other methods. The solver tolerates rapid changes in grid density, large aspect ratios of grid cells, and localized grinding, enabling the mesh requirements to be kept to a minimum. The tool can generate a full-spectrum broadband analysis in a single calculation, which enables it to design components including microwave and radio-frequency devices, antennas, connectors, and high-frequency integrated circuits. Flomerics Inc., Marlborough, MA; tel: 508-357-2012; fax: 508-357-2013; Internet: www.microstripes.com.

Fuses and Cutoffs Brochure

A company's thermal fuses and thermal cutoffs, designed for a wide variety of applications, are presented in a brochure. The fuses and cutoffs are manufactured in ISO 9001–approved facilities to high-quality standards for performance and durability. Full descriptions of features are listed with illustrations. In addition, all approved safety standards are listed. Chatham Components Inc., Chatham, NJ; tel: 973-635-8075; fax: 973-635-6345; e-mail: info@elcut.com; Internet: www.elcut.com.

Oscillator Technology

A company has introduced a line of clock and voltage-controlled oscillators that use an application-specific integrated circuit (ASIC). The ASIC was designed specifically for use in crystal oscillators to provide low jitter (0.3 picosecond integrated jitter) and high frequencies (up to 1.4 GHz). Two product lines are offered. The M2100 is a 5 X 7-mm SMD clock oscillator, and the M3100 is a 5 X 7-mm SMD voltage-controlled oscillator. Both are available in frequencies from 150 MHz to 1400 MHz. A variety of deviation sensitivi-ties are available, enabling the oscillators to be used in many applications currently filled by surface acoustic wave oscillators. Mtron PTI, Yankton, SD; tel: 800-762-8800; e-mail: kcrowser@mtronpti.com; Internet: www.mtron.com.

Ceramic Capacitors

A company has developed a series ceramic capacitor that can minimize short-circuit risk. Two capacitors are serially connected, so that if one fails, no short circuit occurs in the overall component. The B37941X capacitors are available in size 0805 and ceramic material X7R. Types designed for a rated voltage of 100 V cover a capacitance range of 1–100 nF, and those for 50 V deliver 33 to 100 nF. With voltage derating, the components may be operated at temperatures up to 150°C and conform to AECQ200. Epcos, Iselin, NJ; tel: 800-888-7729.

Power-Supply Transformers

A series of compact, low-cost power supply transformers are designed for a wide range of applications. The compact transformers feature a low-profile shape and low heat generation. They are suitable for small and lightweight devices. The multiple-output transformers, which measure 30 X 28 X 25 or 30 X 28 X 30 mm, have outputs of 25 or 50 W and operate at 25 or 35 kHz. Low-profile multiple-output transformers are 36 X 42 X 23 mm with 65-W output and 40-kHz operating frequency. TDK Corp. of America, Mt. Prospect, IL; tel: 847-390-4419; e-mail: sreynoso@tdktca.com; Internet: www.component.tdk.com.

EMC Testing System

A modular EMC immunity test system includes remote personal digital assistant control via a wireless local-area network (LAN). The wireless LAN interface is nondirectional and can be used at a distance up to 300 ft. Standard features include burst and surge pulses and power quality simulations. Other models include ESD, magnetic fields, and voltage variations. The system meets all IEC and EN testing standards. Schaffner EMC Inc., Edison, NJ; tel: 732-225-9533, ext. 239; fax: 732-225-4789; e-mail: usasales@schaffner.com; Internet: www.schaffner.com.

EMI Suppression

Low-noise oscillators and EMI suppression adapters are available for avionics, military, and medical products. EMI and RFI oscillators are available ranging from 4 MHz to 4 GHz. The company is ISO 9001:2000 and ISO 13485:2003 compliant. EMC Component Group, Santa Clara, CA; tel: 408-330-9216; fax 408-330-0012; e-mail: sales@emccomponent.com; Internet: www.emccomponent.com.

Electronic Components

A company offers specialized electronic products, including ferrite cores, amorphous cores, powder cores, thermistors, bobbins, and mounting hardware. The company offers rapid turnaround on custom gapping and fabrication. Inventory programs offered include JIT, kanban, and demand flow procurement. Dexter Magnetic Technologies, Elk Grove Village, IL; tel: 800-775-3829; fax: 877-221-5052; Internet: www.dextermag.com.

SMT Test Points

A series of low-profile surface-mount printed circuit board test points is RoHS compliant. The TP-107 series is engineered specifically for use by fabricators of high-density surface-mount technology printed wiring boards. A unique forming process effectively doubles the surface area of the mounting. Therefore, an excess of 18 lbf would be required to dislodge the test point. Additionally, the TP-107 has a singular loop design to provide a positive and secure location for miniature spring-loaded clips, probes, and hooks. The test points offer a low profile measuring 0.090 in. Electrical specifications include a current rating of 2 A and an operating temperature of –55° to 125°C. Designed for automatic insertion by industry-standard pick-and-place equipment and reflow soldering, they are supplied on 12-mm wide, 4-mm pitch, conductive polycarbonate tape that meets ANSI/EIA-481 standards. Components Corp., Denville, NJ; tel: 866-436-6126; fax: 973-361-5801; e-mail: sales@componentscorp.com; Internet: www.componentscorp.com.