NZS 2772 Radio Frequency Fields of 3 kHz to 300 GHz
NZS 2772.2 determines regulatory compliance pertaining to radio frequency (RF) fields. As a leader in RF regulatory compliance testing, Keystone Compliance recognizes the requirements needed for wireless radio manufacturers. Meeting the ETSI, FCC, and other wireless testing specifications can be challenging. Not only do we understand the challenges, but we help guide companies through the process.
Keystone Compliance is always developing partnerships in GMA and RF exposure testing. These strategic partnerships allow us to meet customer needs beyond our scope of accreditation. We tailor each test plan to individual customer needs minimizing unnecessary costs and over-testing. Keystone’s radio testing engineers and RF test lab streamline the process and assist companies to achieve the compliance they require. From concept through compliance, Keystone meets all of our customers’ needs under one roof.
Summary of NZS 2772 Wireless Regulatory Compliance Testing Information
NZS 2772 states compliance requirements with the exposure limits of radio frequency standards. This includes methodologies for assessing human exposure to ambient RF fields. It also includes induced body currents. These are in the frequency range of 3 kHz to 300 GHz.
The standard also calculates basic restrictions, such as specific absorption rate, in the relevant standards. The assessment methodologies provided in this standard are applied for all types of RF exposure including:
- Leakage fields
- Radiated fields
- Reactive fields
Leakage fields generally apply to unintentional leakage of energy. Radiated fields are considered to be intentionally radiated RF fields. Reactive fields are present in the direct area of all sources of re-radiating objects.
This standard applies to the compliance assessment of RF exposures from most kinds of RF sources including:
- Broadcast installations
- Radiocommunication base stations and facilities
- Radar installation
- Medical applications such as diathermy machines
- Industrial applications
- Wireless charging devices
- Scientific applications
NZS 2772.2 is a guide for making low-level environmental exposure assessments in areas around RF sources.
Radiofrequency is defined as a frequency of electromagnetic field oscillations that is useful for radio transmission. In this standard, radiofrequency extends between 3 kHz and 300 GHz.
Scope of NZS 2772.2 Intentional Radiator Requirements
The RF compliance standard applies to a wide range of scenarios. Variations between specific events are not uncommon. However, the process is essentially the same. Pre-inspection includes defining the assessment risk, determining the source and environmental characteristics, and conducting an evaluation before testing.
This NZS wireless test method references intentional radiators. An intentional radiator is any device that produces radio waves by design. Radio transmitters of all kinds, including the garage door opener, cordless telephone, cellular phone, wireless video sender, wireless microphone, and many others.
An unintentional radiator is any device that is designed to use radio frequency electrical signals within itself. It may also send radio frequency signals over conducting cabling to other equipment. These devices are not intended to radiate radio frequency energy.
Before conducting an exposure assessment, the characteristics mentioned above must be determined. This will permit a better understanding of the expected RF exposures and lead to a more appropriate test procedure.
Propagation and environmental aspects should include the following:
- Output power
- Carrier frequency or frequencies
- Modulation characteristics
- Intermittency, eg. scanning beams, and operational duty factors
- Number of sources and the possibility of creating complex field patterns
- Spurious frequencies including radiated harmonics
- Distance of source to the assessment site
- Type of antenna and properties
- Unintended leakage fields
After completing the RF evaluation and testing, Keystone’s report will contain a range of information including but not limited to:
- The purpose of the assessment
- The date, time, and location of the test
- Operating conditions
- Calibration status
- Any factors that are expected to influence results
- A general description of the testing process
Expert Wireless RF Testing Lab
Our team strives to give our customers more time and energy on product development instead of testing. In addition to NZS 2772.2 testing, Keystone has a full scope of expertise including multiple transmitters, licensed radios, and licensed exempt radios. Keystone has a full lab of test equipment which permits us to provide short lead times on scheduling.