Test and Measurement Channel

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Tutorial Fibercom Clock Timing - A Review of PLL Solutions Bar-Giora Goldberg Peregrine Semiconductor Corp. San Diego, CA The fiber optics telecommunications market (called here photonics) has experienced huge growth in the last few years. Being a two-level digital transmission format, the requirements for clocking, timing, retiming and sometimes...

Product Features A Modern Militarized Rubidium Frequency Standard Datum Inc. Beverly, MA The last decade has seen widespread use of commercial-off-the-shelf (COTS) electronic equipment in military applications, allowing modern technology to be utilized quickly and less expensively. For the most part, this process has been successful provided that the...

Product Feature An Eight-channel YIG-tuned Frequency Synthesizer Array Micro Lambda Wireless Inc. Fremont, CA Low phase noise is a staple of modern communication systems signal sources. For that reason system designers prefer yttrium iron garnet (YIG)-based sources. In addition, many of today's communications systems are required to operate at...

Product Feature A Low Cost Oscillator for Fiber-optic Applications A new, low cost oscillator has been introduced for use in synchronous optical network (SONET/SDH) OC-192 applications. The new frequency source utilizes an ultra-low noise active device technology that allows the oscillator to achieve very low overall phase noise performance....

Technical Note Output Power Improvement of a Push-push FET DRO by Using an Additional DR In this article, the output power level and phase noise properties of nine conventional push-push dielectric resonator oscillators (DRO) have been experimentally investigated while adding an identical dielectric resonator (DR) at the drain ports....

Product Feature A Portable Base Station Installation and Commissioning Test System Racal Instruments Limited Slough, UK Testing in the field puts singular rigorous demands on both the engineer and test equipment used, with the installation and commissioning of field installed base stations presenting particular challenges. Specific considerations include being...

Cover Feature A Complete Spectral System Analysis for RF/Microwave Engineers Eagleware Corp. Norcross, GA Historically, RF and microwave system designers have been forced to resort to a hodgepodge of commercial and custom-written software to characterize and simulate the frequency-domain behavior of complex RF systems and subsystems. This approach tends...

Product Feature A New Wideband Family of Oscillators Vari-L Co. Inc. Denver, CO Modern communication systems are designed to handle ever increasing amounts of data by utilizing more bandwidth and more sophisticated modulation schemes. Voltage controlled oscillators (VCO) are used in almost all radio and RF applications including cell...

Technical Feature Measurement of On-wafer Transistor Noise Parameters Without a Tuner Using Unrestricted Noise Sources This article presents a method for calibrating the four noise parameters of a noise receiver which does not require a tuner. The method permits using general (mismatched) noise sources, which may present very different...

Technical Feature Two-tone vs. Single-tone Measurement of Second-order Nonlinearity Darioush Agahi, William Domino and Nooshin Vakilian Conexant Systems Inc. Newport Beach, CA This article describes how to correctly find the second-order intercept point (IP2) from one- and two-tone tests, and presents measurement results in support of the theory. Relation...