Radio Frequency Interference Investigation and Resolution Guide

This guide can help you locate and identify Radio Frequency Interference (RFI) sources. It's aimed at people with a moderate to high level of electrical, electronic or telecommunications knowledge.

RFI investigation and resolution guide

The information provided in this guide outlines some common causes of interference and suggests a methodology to resolving them.

Radio Frequency Interference Investigation and Resolution Guide  [PDF, 1.1 MB]

Note: This guide was published in 2008 when RSM was a part of the Ministry of Economic Development. Any references in this guide to the Ministry of Economic Development should be read as the Ministry of Business, Innovation and Employment.

RFI sources and solutions

Changing technology means that the sources of interference are continuously changing, and this will often mean adopting new technology and techniques. Nevertheless, well-established methodology that is systematically employed will normally serve practitioners well.

Although best practice in installation and maintenance is essential to preventing and minimising Radio Frequency Interference (RFI), this guide doesn't address such aspects.


Regulatory measures are in place to prevent unacceptable levels of RFI pollution to the New Zealand radio spectrum resource.

Radiocommunications Regulations 2001(external link)