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News and Articles from Accutronics and our Partners

2012-08-22 - MEAS - Triaxial Accelerometer for Motorsports

Measurement Specialties recognizes the special high-performance needs of the Motorsports Industry to measure forces on the racing vehicles. To this end the new Model 4203 Triaxial Accelerometer was developed.
In support of this release, Measurment Specialties published this White Paper providing detailed technical information on the application.

2012-08-07 - MEAS - KMA36 Universal Magnetic Encoder

Measurement Specialties (MEAS, also commonly referred to as Meas Spec)has released the KMA36, a Universal Magnetic Encoder for precise Rotational or Linear measurement. These Position Sensors feature a System-On-Chip technology that combines a magnetoresistive element along with analog to digital converter and signal processing in a standard small package.
In support of this new product, Measurement Specialties published this White Paper on the use of the device. It also makes mention of an optional Evaluation Board - please contact us if you are interested in this.

2012-07-05 - PTF, Inc - Designing Redundant Systems

In many systems, extremely high "up time" for the fully operational system is critical. Additionally, within many of these systems where a precision frequency reference is used (telecommunications, satellite communications, radio and TV broadcasting and many others) phase continuity of the frequency reference is also required, as a phase "jump" can cause client equipment to lose system lock, causing a temporary system outage.
This paper first addresses the reliability benefits of using a redundant system, and then addresses a system solution to providing a fully redundant, no single point failure, seamlessly switched, redundant system. A single 10 MHz reference is addressed, however the concept is expandable to include additional signals if required.

2012-06-29 - PTF, Inc - Signal Distribution for a Phased Array RADAR

Precise Time and Frequency, Inc. manufactures a wide range of frequency references and complementary products such as signal distribution. In many cases specific models have been developed to deal with the particular performance requirements of a specific type of system.
This paper discusses the critical criteria for distribution of frequency and timing reference signals within a highly sensitive phased array RADAR system, and the distribution solution for meeting these special requirements.

2012-06-04 - PTF, Inc - Frequency, Time and Timing Handbook

This handbook is intended as a handy quick reference guide to those people that are in some way involved in developing equipment or systems that rely on frequency or time characteristics in order to correctly function.
The book endeavors to outline some of the important concepts and relationships between frequency and time, and bring together a summary of some useful formulas and references that are used as an integral part of everyday design work in time and frequency applications.

2012-06-01 - Accutronics - Power Supply Advertisement

This advertisement was created to demonstrate the comprehensive Power Supply offering of Accutronics.
This advertisement is in print in the Technews Electronics Buyers Guide and in EngineerIT

2012-02-25 - PTF, Inc - Lightning Protection for GPS Receivers

It is often required that a GPS Antenna used for timing purposes be mounted outside where it may be exposed to adverse weather conditions and ultimately, while fortunately a fairly rare occurence, lighting strikes.
In order to protect the GPS receiver from the resultant incoming surges through the antenna coaxial cable, an optional lightning protector could be used. This document explains the effects of this and the management thereof.

2012-02-25 - PTF, Inc - Designing for high performance in GPS Frequency Standards

Phase Noise and Jitter are different ways of measuring the noisiness of a signal. Both measures are useful in different applications and jitter can be directly calculated from phase noise if the phase noise characteristic is known.
This paper addresses the considerations and steps required to design a high performance, low noise precision frequency standard, with particular focus on phase noise and jitter.

2012-02-25 - PTF, Inc - Application Note on the effective use of GPS Antennas

GPS Satellites provide accurate time and position information by menas of several atomic clocks, that are synchronized to the world time (UTC). Each satellite broadcasts this information with which, when received and decoded within a GPS receiver, exact position and time information can be derived.
The Precise Time and Frequency, Inc. range of GPS Receivers and Network Time servers have been specifically optimized to provide exact timing and frequency references from the signals received from the satellites.

2012-02-25 - PTF, Inc - Optimising Stability in GPS Frequency Standards

While the GPS system has been established for several decades, the equipment that utilizes the precise output data from the satellites has grown not only in massive numbers and variety, but also in its role to support key infrastructure elements and more demanding performance capability. In parallel with this, the GPS system has also developed in terms of specification and capability delivered from the satellites.
Specifically this paper describes one aspect of the detailed measures taken to insure the GPS satellite capability is converted to the best frequency and timing capability possible, to provide an economical frequency standard designed to meet the demanding requirements of today's technological advances.

2012-02-17 - PTF, Inc - Application Note: DAB / DVB

In response to customer demand for improved quality of audio and video programming, digital transmission systems have been developed (DAB/DVB) to enable the installation of broadcasting networks that provide enhanced bandwidth capabilities, improved geographical coverage, and deliver higher quality to the end customer.
This paper is intended to outline some of the fundamental system considerations that need to be addressed, and solutions to some of the system challenges, in order to maintain system signal integrity important to delivering an effective service.

2012-01-01 - ICNIRP EMF Guidelines

In 1974, the International Radiation Protection Association(IRPA) formed a working group on non-ionizing radiation (NIR), which examined the problems arising in the field of protection against the various types of NIR. At the IRPA Congress in Paris in 1977, this working group became the International Non-Ionizing Radiation Committee (INIRC). In cooperation with the Environmental Health Division of the World Health Organization (WHO), the IRPA / INIRC developed a number of health criteria documents on NIR as part of WHO's Environmental Health Criteria Programme, sponsored by the United Nations Environment Programme (UNEP). Each document includes an overview of the physical characteristics, measurement and instrumentation, sources, and applications of NIR, a thorough review of the literature on biological effects, and an evaluation of the health risks of exposure to NIR. These health criteria have provided the scientific database for the subsequent development of exposure limits and codes of practice relating to NIR. At the Eighth International Congress of the IRPA in 1992 a new, independent scientific organization "the International Commission on Non-Ionizing Radiation Protection (ICNIRP)" was established as a successor to the IRPA / INIRC. The functions of the Commission are to investigate the hazards that may be associated with the different forms of NIR, develop international guidelines on NIR exposure limits, and deal with all aspects of NIR protection.
Biological effects reported as resulting from exposure to static and extremely-low-frequency (ELF) electric and magnetic fields have been reviewed by UNEP / WHO / IRPA (1984, 1987). Those publications and a number of others, including UNEP / WHO / IRPA (1993) and Allen et al. (1991), provided the scientific rationale for these guidelines. The main objective of this publication is to establish guidelines for limiting EMF exposure that will provide protection against known adverse health effects. An adverse health effect causes detectable impairment of the health of the exposed individual or of his or her offspring; a biological effect, on the other hand, may or may not result in an adverse health effect. Studies on both direct and indirect effects of EMF are described; direct effects result from direct interaction of fields with the body, indirect effects involve interactions with an object at a different electric potential from the body. Results of laboratory and epidemiological studies, basic exposure criteria, and reference levels for practical hazard assessment are discussed, and the guidelines presented apply to occupational and public exposure.

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