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Vitaly Pipko Overview of new models of oscilloscopes in the domestic market of measuring instruments
The article discusses the development trends and the possibilities of new instruments that have appeared on the domestic market of measuring instruments.
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Measuring technology
Evgeny Drok Digital storage oscilloscopes from GW INSTEK 2000 series
This article presents the technical features of the 2000 series digital storage oscilloscopes manufactured by GW Instek. Oscilloscopes of this series combine reliability, quality and reasonable price.
ROHDE&SCHWARZ has released an ultra-lightweight and compact network analyzer and spectrum analyzer in one instrument with two test ports for operation in the frequency range from 9 kHz to 3 or 6 GHz.
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Measuring technology
Vladimir Gubar, Vladimir Kylymnik Features of measuring grounding resistance
The article discusses the features of measuring grounding resistance with devices manufactured by Metrel (Slovenia).
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Measuring technology
Alexander Sukhomlinov SHIMADZU is the best solution for equipping laboratories in the electronics industry
Analytical equipment manufactured by the Japanese instrument-making corporation Shimadzu enables employees of testing laboratories of electronic industry enterprises to solve assigned tasks in accordance with the most stringent requirements of modern regulatory documents.
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Measuring technology
Brock LaMeres Logic Analyzer Capture Signals at High Speeds
In recent decades, developers of digital circuits have used logic analyzers as the main means of assessing the correctness of projects. Today's skyrocketing clock speeds have made signal integrity especially important in all parts of the system, including for testing. To achieve an accurate result, it is no longer enough to simply randomly connect logic analyzer probes. It became necessary to take into account such parameters as the location of the probe, its load, and also the proximity to the transmission line. This article describes some of the pitfalls that await those who are engaged in debugging high-speed digital circuits. Probe loading models and the effect of probe placement are also discussed. Finally, the two main methods for connecting to a high speed system are described - loopback sensing and resistor drop sensing.
30
Measuring technology
Leonid Ermakov, Sergey Shilyaev Diagnostics of industrial systems: the practice of developing measuring systems
The features of constructing a measuring complex for diagnostics of industrial systems based on measuring sensor signals and comparing them with reference values are considered. The characteristics of the components of this complex developed by the authors are presented and recommendations are given on the choice of the optimal equipment in relation to the specific tasks of the customer. The article discusses the features of circuit solutions for diagnostic meters of JSC "Rudnev - Shilyaev", which were found in the development of diagnostic systems.
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To help the developer
Vitaly Shevchenko Using International Rectifier's Ballast Designer for Electronic Ballast Design
Today, more and more often, the question of energy saving when lighting premises arises. The minimum investment of time and money for the design of electronic control gear (ECG) is a determining factor in the implementation of the project. Designing high frequency electronic ballasts and sizing components for different types of lamps can be an engineering challenge with many unknowns. The article will discuss an effective design tool for electronic ballasts from International Rectifier - the Ballast Designer Assistant program.
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To help the developer
Mikhail Sokolov, Denis Darvish Development of wireless devices in the 2.4 GHz range: element base, software, debugging and design tools
The 2.4 GHz frequency band has recently gained increasing popularity in monitoring, control, telemetry and data transmission systems. The increased interest in it was not least due to the emergence of the new ZigBee wireless technology and the underlying IEEE802.15.4 standard. Many articles have already been published describing this technology and the features of the standard, so we will dwell in more detail on the issues of choosing an element base, developing hardware and designing software for wireless devices.
CREE is an innovator among semiconductor light source manufacturers. The unique LEDs of the company occupy a leading position in terms of brightness, efficiency and reliability.
50
Analog technology
Oleg Dvornikov Circuitry of bipolar-field analog microcircuits. Part 10. Stable gain wideband differential amplifiers
The article completes the series of publications on the design of analogue ICs (CHIP NEWS Ukraine, 2005, No. 1–5, 10; 2006, No. 2, 3, 10). Various circuitry solutions for differential amplifiers with fixed gain are discussed.
52
Microprocessors
Pavel Vovk An introduction to the Cortex-M3 architecture. Part 3
In the previous parts of the article, the main components of microcontrollers with the Cortex-M3 architecture and their features were considered in detail, which make it possible to use these microcontrollers in the widest range of applications from the simplest and cheapest to complex information processing systems in real time, requiring high performance. The greatest advantage of Cortex-M3 microcontrollers in the highly competitive microcontroller market is their superior adaptability to market demands while maintaining a consistently low solution cost. In this part of the article, we will look at one of the most important components of any microcontroller system, namely memory and how it is used, implemented in the Cortex-M3 architecture.
59
Microcontrollers
Yuri Zobnin Evolution stage: transition from 8- to 32-bit systems as an objective reality. Comparative analysis of modern 8- and 32-bit microcontrollers. Part 2
In this part of the article, the main criteria for the expediency of switching to 32-bit microcontrollers are highlighted, a comparative analysis of 8- and 32-bit microcontrollers is carried out for each criterion. Provides reference data on the most popular 32-bit microcontrollers with ARM7 core from the world's leading manufacturers.
62
Telecommunications
Alexander Stratienko RADIOCRAFTS ISM radio modules
The article provides an overview of the functionally completed radio modules of the RADIOCRAFTS company (Norway) for the implementation of wireless telemetry tasks in the ISM band. Specific examples of the use of radio modules are described, which allow organizing transmission both in the "point-to-point" mode and building complex networks, including ZigBee networks based on the IEEE 802.15.4 standard.
70
Sensors
Dmitry Klimenkov Sensors from ASM and MEL
This article provides a brief overview of the position sensors manufactured by ASM, as well as laser linear sensors and profile scanners from MEL. Both companies are based in Germany and have over twenty years of experience in the development and manufacture of various types of sensors.
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FPGA and BMK
Valery Zotov Practical course of end-to-end design of digital devices based on FPGAs from Xilinx. Part 7
The seventh part of the course introduces various methods of preparing a module for describing test influences, which is necessary for functional and temporal simulation of the device under development. The mechanism of using time and topological constraints in projects implemented on the basis of Xilinx FPGAs with CPLD and FPGA architecture is considered. The syntax of expressions for typical time and topological constraints is given. Described are various ways to prepare the module of temporal and topological constraints in CAD series Xilinx ISE.
78
Engineering practice
Michelle Lawton InterRAT handover and cell handover test using two base station emulators
The ability to perform handover verification without service interruption is a key requirement for all cellular networks. Historically, this has been noticed in the task of supporting voice calls during handover in a cellular voice system. This situation has now changed due to the need to support cellular transitions in the presence of many types of services (voice, video and data transmission), as well as in the implementation of pause-free various wireless technologies (GSM/EDGE, WCDMA/HSDPA). This expansion of coverage significantly complicates the compliance testing requirements. In addition to the latter, user equipment (UE) developers are now looking for more cost effective solutions that will provide extended test coverage and support their need for validation and retesting. This article discusses how two Agilent 8960 systems can be used for this purpose.
82
Engineering practice
Lucio Di Jasio Ethernet for connecting embedded control devices
Considered are the issues of choosing the type of communication channel for connecting various devices with built-in control - alarm sensors, monitoring, control. The advantages and disadvantages of the main communication interfaces are analyzed from the point of view of their use to create distributed control systems. It is shown that with the use of modern microcircuits, the Ethernet network turns out to be the optimal communication option.
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Digital signal processing
Ken Young Getting a flat DAC frequency response
DACs typically convert bandwidth-limited digital signals. The frequency response of the DACs themselves is not flat, but rather lowers the high frequencies of the analog output. For example, at 80% of the Nyquist frequency fNYQUIST, (fNYQUIST = fS/2), the amplitude attenuation is 2.42 dB. This level of loss is unacceptable in some broadband applications requiring flat frequency response. Fortunately, there are several methods available to deal with frequency jitter in a DAC. These techniques include increasing the speed of the DAC using interpolation, pre-equalization filtering, and output equalization filtering. All these methods eliminate the influence of the sin (x)/x factor.
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