EMF
This page contains more information regarding EMF compliance at M7CBR.
EMF, or Electro-Magnetic Fields, is a phenomenon that occurs during the transmission of an RF signal. EMFs can be produced naturally, such as those emitted from the Earth's magnetic field and deep space signals, as well as being produced through man-made activities.
The majority of EMF signals are a result of human activities, and can arise from a number of sources, including:
- Electricity
- Television Broadcasting
- Radio Broadcasting
- Cellular (Mobile) Networks
- Wi-Fi Networks
Fundamentally, if a radio signal is emitted by a device, then it is expected that an EMF signal will also be produced. Generally, the higher transmit power of the RF device, the larger the EMF. Also, the EMF will be stronger at the transmission source (antenna) compared to a distance that is further than the source.
From current scientific understanding, EMF is deemed to be generally harmless at low levels, however high intensity EMF has been proven to cause specific reactions in living tissue. These are:
- For frequencies below 100kHz, the stimulation of the nerves and muscles
- For frequencies above 100kHz, the heating of body tissue
Most radio transmissions occur above 100kHz, other than those used for LORAN navigation (100kHz), time signals (e.g. MSF @ 60kHz, DCF77 @ 77.50 kHz) and some military/navy transmissions.
For radio transmissions, the International Commission on Non-Ionizing Radiation Protection (ICNIRP) have published a set of guidelines that outline safe limits of EMF for public consumption.
In 2021 OFCOM, the UK Radio Spectrum Regulator, announced that all parties that hold a radiocommunications licence must assess their EMF emissions and record the findings.
An assessment has been carried out relating to M7CBR's transmission activities and a copy of the document is available to download below.
The current version of the EMF Document is available
here
Useful Links
The following resources provide more information regarding EMFs