Test & Measurement
 452 results found for Test & Measurement, displaying items 121 - 140

June 2008
Making Advanced Radar Measurements
Evaluating the performance of an advanced radar system depends upon the capabilities of both the operator and the test equipment. The test gear must be properly specified to achieve accurate results for a number of key measurements, including rise time, frequency error estimation, and pulse-to-pulse phase measurements. Matching the capabilities of the test equipment to the expected performance of the radar system can ensure accurate and repeatable ...  — Darren McCarthy

June 2008
Cable Kit Checks WiFi And Broadband Infrastructure
Cable Kit Checks WiFi And Broadband Infrastructure FOR BOTH WIFI and broadband infrastructure installation, cables are needed for RF and data throughput. With the variety of connectors available today and the popularity of reverse-polarity styles, it has become quite difficult to test these cable assemblies in the field. The RFA-4028-WIFI kit was created to simplify this task. The kit contains a Unidapt RF cable tester (RFA-4018-20) with an assortment of 30...  — Nancy Friedrich

June 2008
Fast Meters Scale Microwave Power Peaks
Power measurements are critical for characterizing modern high-frequency systems and their components. With the growing use of pulsed and pseudorandom signals in both commercial communications and military radar systems, power meters capable of peak and continuous-wave (CW) measurements are more valuable than ever The new 4540 series of power meters from Boonton Electronics (www.boonton.com) is such an...  — Jack Browne

June 2008
Compact Oscilloscopes Check Embedded Systems
Embedded systems, complete with memory, microcontrollers, and digital signal processing (DSP), can be found in the majority of modern electronic equipment, be it for commercial, industrial, or military applications. Checking the serial communications buses in these systems can be challenging without the right tools. Fortunately, the DPO3000 Digital Phosphor Oscilloscopes (DPOs) from Tektronix (...  — Jack Browne

June 2008
Microwave VNAs Add Nonlinear Network Analysis
A dverse effects of nonlinear behavior in active and passive high-frequency components can disrupt communications systems. As a result, it is desirable to understand such behavior, which requires the right test equipment. To help, Agilent Technologies (www.agilent.com) has announced nonlinear vector network analyzer (NVNA) capability for its PNA-X series of microwave vector network analyzers (VNAs). ...  — Jack Browne

May 30, 2008
UWB WiMedia “Test Cookbook” Covers Version 1.2 Requirements
The WiMedia ISO standard for high-speed ultra-wideband (UWB) wireless connectivity may offer efficient power consumption and high data rates, but its test requirements are some of the most complex among current wideband RF standards...  — Lisa Maliniak

May 30, 2008
LXI Consortium Adds First Member And Product Certification From China
RIGOL Technologies, maker of digital oscilloscopes, functional/arbitrary waveform generators, digital multimeters, and virtual instruments, has become the first LXI Consortium member from mainland China. The RIGOL DS1204B digital oscilloscope was certified in February 2008...  — Lisa Maliniak

May 30, 2008
Spirent Communications and Agilent Technologies Will Join EGPS Forum
Agilent Technologies and Spirent Communications will join CSR and Motorola in the EGPS Forum, an open industry forum for evaluating and fostering enhanced Global Positioning System (EGPS) technologies. Working with CSR, each company has created a building block of a system that can simulate both GPS and cellular signals...  — Lisa Maliniak

May 30, 2008
Aeroflex and Innowireless Partnership Works To Speed 3GPP LTE Development
Aeroflex and Innowireless have entered into a technology partnership designed to accelerate the development of 3GPP LTE mobile devices for subscribers. Under the terms of the partnership, the two companies will combine their collective engineering skills and resources to collaborate on the development...  — Lisa Maliniak

May 2008
Modular GPIB Switches Connect Test Applications
Switching signals among test sources and devices under test (DUT) in a measurement setup can be cumbersome and time-consuming. Fortunately, the GPIB series 8000 modular switch assemblies help simplify complex test assemblies with reliable electromechanical microwave switches mounted in their own rugged enclosures. The switch assemblies are designed for applications from DC to 18 GHz...  — Jack Browne

May 2008
Eliminate Fixture Effects On Device Measurements
Increased accuracy has been an objective of the earliest vector network analyzer (VNA) measurements. By means of calibration and vectorerror- correction techniques, the accuracy of a VNA can be extended from the instrument ports to the ends of the test cables. When the device under test (DUT) connects directly to the test port cables, the calibration plane and the measurement plane are one and the same. In this case, calibration and error ...  — David Ballo , et al.

May 2008
Modular Approach Provides Fast And Easy Prototyping
Prototype development of RF and microwave designs can be tedious, requiring weeks or even months of engineering and construction time. For those who seek a faster, easier approach to the prototyping of new RF and microwave designs, however, MicroWaveCells (www.microwavecells.com) offers a new and innovative approach to building high-frequency circuit functions, subsystems, and complete systems in hours and days,...  — Jenny Jiayan Shen

April 2008
Low-Jitter Modules Generate Clock Signals To 40 Gb/s
Billions of cellular telephones and their users worldwide are driving demands for faster communications networks. Optical communications systems support long-distance services and serve as the backhaul communications for wireless networks. At one time, optical communications systems operating at 10 Gb/s (OC-192) may have seemed adequate but, with growing voice, data, and video traffic, optical communications networks carrying data rates of 40 Gb/s ...  — A.P.S. (Paul) Khanna

April 2008
VCO Source Programs Arbitrary Waveforms
Frequency agility is a key requirement for a variety of military systems, including electronic warfare (EW), electronic countermeasures (ECM), secure communications, and electronic intelligence platforms. For these systems, conflicting requirements in technical performance, power management, packaging, and environmental survivability often give rise to interesting and innovative designs. The engineers at Narda Microwave-East resolved these conflicts...  — Neil Heft , et al.

April 2008
Field Operations Kit Aids High-Power Testing
High-power attenuators are often used to decrease the power level from a base station or communications tower when making measurements with a spectrum analyzer or portable communications instrument. Test instruments are usually only rated for input power levels approaching 1 W (+30 dBm) at most, and power levels from wireless communications transmitters can easily exceed 100 W. Unfortunately, the attenuation value of a high-frequency fixed...  — Jack Browne

April 2008
Broadcast Signal Generator Integrates Test Functions
Broadcast television equipment production testing usually requires a trio of tools: a signal generator, modulator, and high-power amplifier for distributing test signals throughout a manufacturing facility. They combine to evaluate televisions, set-top boxes, and other broadcast products in accordance with a specific standard or standards at multiple frequencies and with different waveforms. To simplify matters, the R&S SFE100 broadcast signal...  — Jack Browne

April 2008
OTA Testing Evaluates Mobile-Device Performance
OTA Testing Evaluates Mobile-Device Performance To more accurately predict the real-world performance of a mobile device, both standards organizations and network providers are increasingly turning to over-the-air (OTA) testing. The Cellular Telecommunications Industry Association (CTIA), for example, has defined the methods and set the standards for performing OTA testing. In a four-page white paper, RFMD (...  — Nancy Friedrich

March
Noise Source Promises +/-0.25 dB Flatness Over 10 kHz To 3 GHz
Noise Source Promises +/-0.25 dB Flatness Over 10 kHz to 3 GHz To reduce measurement uncertainty in broadband applications, a coaxial noise source features typical flatness of +/-0.25 dB over the entire frequency range of 10 kHz to 3 GHz. The NW3G-CS comes with calibrated, cardinal excess-noise-ratio (ENR) frequencies. The noise source is available in 15 and 30 dB ENRs. Standard operation is from +28 VDC with a 20-mA maximum current draw. The...  — Nancy Friedrich

March
12-Port VNA Characterizes Crosstalk On High-Speed Lines
This 12-port vector network analyzer and novel multiport calibration algorithm combine for signal-integrity analysis on transmission lines and devices at multi-Gigabit speeds. Harry Momjian Marketing Manager Anritsu Co., 490 Jarvis Dr., Morgan Hill, CA 95037-2809; (408) 778-2000, FAX: (408) 776-1744, E-mail: harry.momjian@anritsu.com, Internet: ...  — Harry Momjian

March
VNA Extends Four-Port Measurements To 50 GHz
VNA Extends Four-Port Measurements to 50 GHz Yassen Mikhailov Product Manager, Network Analyzers Rohde & Schwarz, 8661A Robert Fulton Dr., Columbia, MD 21046-2265; (410) 910-7800, FAX: (410) 910-7801, e-mail: info@rsa.rohde-schwarz.com, Internet: www.rohde-schwarz.com. This instrument brings high performance and four independent test...  — Yassen Mikhailov





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