Articles, Test Guides and Webinars

EMC Formulas and Equations

A Collection of EMC Formulas and Equations

Formulas and Calculations

Engineer's were not meant to be caged in cubicles or meeting rooms, engineer's were meant to calculate. Their pencil quick-draws are unmatched; their computing expertise unparalleled. These are the RF formulas that stir a primal craze of chest bumps and cheers, not polite half-smiles.

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Antenna an power amplifier combinations

Selecting antenna/power amplifier combinations for the coming new RF immunity standards

Article

This article explains different power amplifier / antenna matching combinations for some new RF immunity standards. Though far from certain, it looks as if 6 GHz is a strong canidate for the upper frequency for consumer products.

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Problems in EMC Test Set-ups

Problems in EMC Test Set-ups and How to Fix Them

Webinar

Fixing faults in EMC test set-ups, especially those in test chambers, can tie test-staff down for an inordinate amount of time. So start saving time and money by finding out how to identify and fix them.

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Radiated Emissions Measurement

Radiated Emissions Measurement Test Guide

Test Guide

This is a brief overview on how to perform a standard Radiated Emissions Measurement test. It includes how to set up, take measurements and calculate results.

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Antenna Selection by test type

Antenna Selection by Test Type

Application Note

Here is a listing of some of the common test types and the appropriate antennas to perform that test.

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Selecting an EMC Antenna

The 10 Factors You Need to Consider When Selecting an EMC Antenna

Webinar

The antenna is one of the least understood components in an EMC test instrumentation set-up, and a poor choice of antenna(s) can lead to multiple problems. this webinar, presented by AH Systems, guides you through the key parameters that need to be considered when selecting an EMC test antenna.

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calibration Interval

Antenna Calibration Interval

Application Note

Much of the success or failure of EMC test depends on the performance of a calibrated antenna. Antenna calibration is important to ensure repeatable, reliable data and this technical note will discuss calibration intervals.

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Bulk current injection testing

A Basic Bulk Current Injection Test Method

Test Guide

Here is an example of bulk current injection (BCI) test. Bulk current injection testing is to confirm that RF signals, when coupled onto interconnecting cables and/or power supply lines, will not cause degradation of performance or deviation from specifications of the equipment under test.

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Antenna Terms and Definitions

Common Antenna Terms and definitions

Application Note

Here is a list of antenna terms and definitions for engineers and technicans commonly used with compliance testing.

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VSWR vs. Returned Power cheat sheet

Application Note

Just in case you don't care for mathematical equations, here's a little "cheat sheet" table to help understand the correlation of VSWR to the percentage of reflected power that will return.

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Power Amplifier System Checks

Power Amplifier and Test Systems Check

Test Guide

This test procedure describes how the small signal performance data of an amplifier is gathered and checked against previously recorded data. This is a fault finding step that establishes the health of the preamplifier.

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Choosing the Right Antenna

Choosing the Right Antenna for Today's Testing Requirements

Webinar

A simple guide to determining the correct choice of antenna to match the test required. RF veteran Tom Mullineaux in collaboration with the experts at AH Systems presents the basics and a framework for beginners, as well as more advanced topics for intermediate and advanced test engineers.

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AM, FM and TV Frequencies

AM, FM and TV Frequencies

Application Note

In order to help better identify signals of interest from ambient signals that might already be in the area, we have included a table of VHF, UHF, and FM frequencies, as a companion to our TDS-536 TV Dipole set, specifically designed for testing at these frequencies.

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The Antenna Factor Concept

The Antenna Factor Concept

Article

What exactly is the "Antenna Factor" concept, how is it created and how is it used.

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Dipole Antenna Element sizes

Tuneable Dipole element lengths

Application Note

Here is a listing of our Tuned Dipole Antennas and the appropriate element lengths for each balun.

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VSWR Explained

VSWR Explained

Article

VSWR Stands for 'Voltage Standing Wave Ratio' and is used in EMC to specify the effect of a mismatch presented to a test system signal. Here is a brief history and explaination the term VSWR.

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