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Testing Interference in a Wireless Environment

October 8, 2012 7:07 am | by Rolland Zhang, Agilent Technologies | Articles | Comments

In wireless systems, interference in the wireless channel can be quite problematic, degrading the reception of desired signals. It can originate from a variety of intentional, unintentional and incidental radiators and occurs in both licensed and unlicensed spectrum. With the growing scarcity of radio frequency spectrum and ongoing efforts to improve its utilization for the highest capacity and performance (e.

Making Moves and Harvesting Energy

October 1, 2012 12:24 pm | by Janine E. Mooney, Editor | Blogs | Comments

Engineers are tossing the batteries and making advances to save wasted energy in more effective and realistic ways Today’s technology offers the OEM more cultivated and feasible power options for wireless networks and devices. Also known as “power harvesting” or “energy scavenging”, energy harvesting is when energy originates elsewhere, from an external source.

Making the Connection

July 24, 2012 9:12 am | Blogs | Comments

By Janine E. Mooney, Editor Design changes present new opportunities, and requirements, that allow the RF industry to assume a much greater application reach. Malcolm Gladwell, a British-born Canadian journalist, bestselling author and speaker, once said, “Connectors are people in a community who know large numbers of people and who are in the habit of making introductions.

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Choosing an EMI Gasket for Your Design

July 24, 2012 8:59 am | Blogs | Comments

By Janine E. Mooney, Editor EMI gaskets are a must in order to properly block all interference from reaching your device. A key concern when shielding your design is choosing a gasket. Gaskets are used to seal seams and other gaps that can cause problems in shielding, thus implementing the best fit is imperative.

Eliminating Interference with Shielded Enclosures

July 24, 2012 8:37 am | Blogs | Comments

By Janine E. Mooney, Editor EMI has the ability to interrupt or even destroy the functionality of unprotected electronics. What’s more important than protecting your valuable electronics from potential threats? Not much. Especially with regards to military electronics, which are growing more and more prevalent every day.

Why EMI Inductors?

July 24, 2012 6:59 am | Blogs | Comments

By Janine E. Mooney, Editor Inductors are a vital part of most EMI filters, and can be a smart addition to your design. Connectors, enclosures, resistors, capacitors, attenuators, inductors... and how does this all relate to EMI? EMI inductors “ideal inductors” as opposed to “real” inductors; they have inductance but no resistance or capacitance and they do not either dissipate or radiate energy.

Palmer Wahl Introduces the C150 On-site Multifunction Calibrator

July 20, 2011 8:39 am | Articles | Comments

The ergonomically designed Wahl C150 On-site Multifunction Calibrator features unique built in “easy connect” terminals, portable and bench top flexibility, and easy to use intuitive embedded software. Fully protected with an external anti-shock rubber boot with IP 54 rating, it features five user-selectable languages,0.005% accuracy over 1 year, NIST traceability, and HART transmitter compatibility.

Customizing COTS Testing Systems

July 12, 2011 8:07 am | Articles | Comments

Turning Off-the-Shelf Components into an Application-Specific, Total Data Acquisition Solution By definition, the off-the-shelf modular instruments (VME, PXI, VXI, CompactPCI, PCI, etc.) used to create automated test and measurement systems are designed to be general purpose, programmable, and flexible enough to handle a variety of input ranges and types, speeds, and functions.

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Amplifier Test Software Simplifies Test and Certification of RF Amplifiers

July 6, 2011 11:25 am | Articles | Comments

Boonton has launched “Amplifier Test Bench”, a new software package that simplifies test and certification of RF Amplifiers. Amplifier Test Bench supports analysis of pulsed and linear amplifiers; furthermore it measures gain over frequency and gain over input power. The software supports both fast Boonton peak power meters 4540 and 4500B and a variety of standard generators.

CCI Solves Crucial Cell Site Interference Issues with Latest Analyzer Solutions

July 5, 2011 8:53 am | Articles | Comments

Leading provider of wireless base station enhancement products, Communications Components Inc. (CCI), has now launched its PiMPro family of analyzers in EMEA, which enable mobile network operators (MNOs) to remove the adverse affects of Passive Intermodulation (PIM) – a form of interference - from their networks, and prevent it from damaging quality of service (QoS) and customer experience.

New Measurement Solution For Optical Transmitter Compliance Testing Offers the Highest Bandwidth Optical Waveform Analysis and Increased Accuracy

June 29, 2011 11:12 am | Articles | Comments

Agilent Technologies introduced a new measurement solution for optical transmitter compliance testing on the Agilent 86100D digital communications analyzer. The solution offers the industry’s highest bandwidth optical waveform analysis and increased accuracy. The DCA provides a new approach, known as system impulse response correction, or SIRC, which enables multimode optical receivers with bandwidths in excess of 25 GHz and single-mode receivers with near 100-GHz bandwidths.

Increasing Complexity of Devices Under Test (DUTs) - Boom or Doom for the Test Engineer

June 27, 2011 7:05 am | Articles | Comments

Frost & Sullivan's Industry Director Jessy Cavazos and Industry Analyst Prathima Bommakanti, along with guest speaker Matthew Friedman, Senior Product Manager for Automated Test at National Instruments, have completed extensive analysis on the electronic test equipment market. The experts will lead a short teleconference about new findings that affect the market, followed by a live question-and-answer session.

Field-to-Lab Testing Equals Better Real-World Performance for Mobile Devices

May 13, 2011 11:15 am | Articles | Comments

This case study will describe an application of the Azimuth Systems Field-to-Lab (FTL) Solution by a market-leading handset manufacturer. Real-world drive testing is very expensive; lab testing is much less expensive and faster -- provided that the real world can be emulated with sufficient fidelity.

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RF/IF Amplifiers and VGAs Cover The Entire Signal Chain

May 12, 2011 6:23 am | Articles | Comments

By Ashraf Elghamrawi, Analog Devices ( www.analog.com ) The amplifier is one of the most versatile building blocks used in RF/IF signal chains today. They are commonly used throughout designs to overcome signal losses incurred from passive mixers, filters, baluns, and other passive elements. Since these losses occur across the entire signal chain five main families of amplifiers have been developed by Analog Devices.

Custom IF SAW Filters for Sirius Satellite Radio Receivers

April 13, 2011 11:08 am | Articles | Comments

Problem Solvers - Filters By Jidong Dai, Ph.D., Mike Ferguson, Frank Perkins RFM, and Bob Dockemeyer, Delphi Sirius Satellite Radio broadcasting utilizes highly elliptical orbit (HEO) satellites, resulting in superior coverage over North America where the service is targeted. However, even with superior coverage, there are still areas where the satellite signals are blocked, like city centers with many skyscrapers, overpasses, and areas with strong interference signals.

TECH EXCHANGE

April 12, 2011 12:27 pm | Articles | Comments

Welcome to Tech Exchange on Test & Measurement! Each month this new section will focus on a different product category and will include a brief interview with a representative from a leading OEM. This Month: Vivek Vadakkuppattu, Product Manager for Azimuth Systems Q: What were some of the most significant technological developments in the Test & Measurement industry in 2010? At Azimuth Systems, we continued to see the trend of greater focus being put on real world-centric performance testing in 2010.

Use Oscilloscopes to Monitor Multiple Protocols

April 11, 2011 12:32 pm | Articles | Comments

By Roland Gamper, LeCroy Corporation Regardless of the system topology and application domain, the development, maintenance and monitoring of electronic system architectures using mixed protocols requires tools able to straddle several busses, at various speeds and with different line characteristics.

Powering Toll Tags

March 29, 2011 5:31 am | Articles | Comments

Case Study: Customized Coin Cell Holders for Automotive Toll Tags Challenge A leading manufacturer of toll tags recently approached MPD looking for a new battery holder to replace soldered-in batteries. The customer had two main problems with their current battery solution.

Selective Data Replication between Embedded and Enterprise Systems

March 15, 2011 11:57 am | Articles | Comments

By Steve Graves, McObject Among wireless systems developers, database management system (DBMS) replication is typically associated with high availability (HA). Deploying real-time DBMS software on a master node, with multiple synchronized copies of that database running on standby nodes, and automatic failover to one of these replicas in the event of the master node’s failure, provides for instant recovery and maximum system up-time.

Power Saving Techniques in GSM-GPRS-EDGE Handsets

March 10, 2011 10:01 am | Articles | Comments

By Dr. Oleksandr Gorbachov, CTO, RFaxis, Inc. With over 600 million new mobile phone handsets shipped each year, mobile phones have become an integral part of our daily lives. As more and more new features are being demanded in smaller and thinner handset form factors, excessive current consumption and poor battery life become real issues for the mobile phone user.

RF Envelope Detection Enables Drain Modulation Systems

February 14, 2011 10:14 am | Articles | Comments

By Eamon Nash and Ashraf Elghamrawi, RF Group, Analog Devices, Inc. Improving the Power Added Efficiency (PAE) of High Powered Amplifiers continues to be a challenging goal in a Wireless equipment industry that is struggling to deliver cheaper, smaller equipment that consumes either less electricity or in the case of portable devices, less battery current.

Energy Harvesting and Wireless Balancing Power Generation and Consumption

February 10, 2011 6:11 am | Articles | Comments

By Martin R. Johnson, ILLUMRA and Eugene You, EnOcean, Inc. Wireless, energy harvesting technologies are making waves in building automation and energy conservation controls because they overcome limitations of hardwired solutions and maintenance issues inherent to battery-dependent devices. This article will discuss the science behind wireless, energy harvesting technology and explain how to budget miniscule amounts of energy sufficient for managing building energy usage.

The Effects of Meandering in RFID Tag Design

January 20, 2011 10:58 am | Articles | Comments

By Mark Forbes, Mentor Graphics Corporation As is well known, maximum RF coupling occurs when impedances on each side of the coupling match. A perfect match occurs when the impedances are identical and the Complex Matching Factor (CMF) is 0dB. When the CMF is 0db, the imaginary terms of the complex conjugate cancel, and the resistance is equal.

Full Signal Path Solution for Portable Ultrasound Systems

January 10, 2011 12:02 pm | Articles | Comments

By Suresh Ram, National Semiconductor Corporation There is a rising demand for accessible medical care. The world population is rapidly growing and aging, increasing the cost of healthcare. Medical practitioners need small energy efficient and cost effective diagnostic devices. Portable diagnostic equipment that improve quality of healthcare in a cost effective manner are highly desirable.

Meeting the Challenge of Multi-standard Wireless Communications Testing

December 16, 2010 9:05 am | Articles | Comments

By Tim Carey, Aeroflex Test Solutions Non-cellular technologies are increasingly being integrated into cellular terminals, and this has generated the need for test systems that comprise a number of different test platforms, which can make system integration both complex and costly. At the same time, there is pressure to increase test speed and, in combination with the proliferation of functional tests associated with the introduction of new standards, this further increases the costs.

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