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Industry News

Spectrum Analyzers for High Frequency Point-to-point and Point-to-multipoint Networks

A spectrum analyzer that can be used to verify the performance of a local multipoint distribution service transceiver's transmitter is featured on this month's cover
Spectrum Analyzers for High Frequency Point-to-point and Point-to-multipoint Networks Anrtisu Co. Richardson, TX The world of microwave radio continues to add exciting opportunities to the telecommunications market. With the advent of digital microwave technology, manufacturers now are providing point-to-multipoint systems that offer digital voice and data distribution for private...
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A GPS Frequency and Time Standard

Global Posistioning System (GPS) frequency and time standards that represent a significant advantage in time keeping and frequency reference technology
A GPS Frequency and Time Standard Quartzlock UK Ltd. Totnes, Devon, UK The Global Positioning System (GPS) is used widely to determine location. If at least four of the system's satellites are in view (typically six or seven are in view at one time), position can be determined in...
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System Design, Simulation and Analysis Software

PC-based software developed specifically to support all aspects of system design
System Design, Simulation and Analysis Software Elanix Inc. Westlake Village, CA A new comprehensive PC-based software package has been developed specifically to support all aspects of system design. SystemView" is a complete visual design environment for dynamic system design, simulation and analysis. The software suite operates under Windows® with...
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A 2 GHz Hand-held RF Field Strength Analyzer

A portable analyzer for performing RF field strength measurements in actual field operating conditions
A 2 GHz Hand-held RF Field Strength Analyzer Protek Northvale, NJ In today's complex world of wireless communications systems it is sometimes necessary to determine a transmitter's radiated field strength in actual field operating conditions. This strategy requires portable testing in the field, which may be among buildings in...
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Cold War to Counter Drug

A relocatable over-the-horizon radar, which has become an integral part of the US' national drug strategy
Cold War to Counter Drug Ellen Ferraro and Drew Ganter Raytheon Co. Bedford, MA A small twin-engine airplane flies low over the water to avoid radar detection. At an undisclosed Caribbean airfield, two men waiting by a truck signal that it is all clear to land. The plane lands...
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The Pulse Desensitization Factor

A look at the deeper meaning of the pulse desensitization factor or product of pulse width and receiver bandwidth
The Pulse Desensitization Factor Morris Engelson JMS Consulting Portland, OR Len Garrett Tektronix Inc. Beaverton, OR It is well understood that the occupied spectrum width of a pulsed signal is inversely proportional to pulse width, accompanied by an associated reduction in spectrum level as the spectrum width increases. In...
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Near-field Mapping above a Coupled-line Filter and a MMIC

A comparison of the electric field measured with a modulated scattering technique and calculated with finite-difference time domain simulations for three-stage coupled-line microstrip bandpass filter
Near-field Mapping above a Coupled-line Filter and a MMIC This article presents a comparison of the electric field measured with the modulated scattering technique and calculated with finite-difference time domain (FDTD) simulations for a three-stage coupled-line microstrip bandpass filter. Electrically small dipoles and monopoles 150 and 100 mm long,...
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Applying Error Correction to Network Analyzer Measurements

Characterizing systematic errors in a test system and then removing them mathematically from subsequent measurement
Applying Error Correction to Network Analyzer Measurements David Ballo Hewlett-Packard Co., Microwave Instruments Division Santa Rosa, CA Designers and manufacturers use network analysis to measure the electrical performance of the components and circuits destined for use in more complex systems. When these devices convey signals with information content, designers...
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Around The Circuit

Around The Circuit INDUSTRY NEWS Raytheon Co. has completed its merger with Hughes Aircraft 's defense operations. Raytheon reports the merger is part of the company's effort to remain a top-tier company in a consolidating defense industry. The defense operations will become part of Raytheon Systems Co. , a...
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New Literature

New Literature Accuracy Application Note This application note describes frequency accuracy for test equipment, including synthesized signal generators, network analyzers, frequency counters, spectrum analyzers and other equipment that use quartz crystal time base standards. Methods are presented to determine overall frequency uncertainty. Anritsu Co., Microwave Measurement Division, Morgan Hill,...
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