[Skip to content]
 Home
 News Index RSS XML Feed
 Our researched articles
 Science (General)
   List of studies
   Basic guide to EMFs
   EMF guidance levels
   RF unit conversion
   FAQs
   Other resources
 ELF ("Power" EMFs)
   Overview
   Powerlines
   Substations
   Electrical wiring
   Electrical appliances
 RF ("Microwave" EMFs)
   Overview
   WiFi
   Mobile phones
   Cordless phones
   Mobile phone masts
   Other resources
 Health
   Childhood leukaemia
   Brain tumours
   Electromagnetic sensitivity
   Other health effects
 Action
   Reduce your exposure
   - Mobile phones
   - Phone masts
   - Powerlines
   EMFields store

Valid XHTML 1.0! Valid CSS!

- Liability disclaimer -
- Privacy policy -
- Cookies policy -
© Copyright Powerwatch 2017

» Printer friendly version

14/03/2002 - Police reconsider using TETRA

(Revision to the story): We have been told that TETRA vehicle radios have been turned off in Manchester police cars because of their tendency to turn into loud 'squawk boxes' are various times. The loud squawking noise they have been emitting without warning now and again have been causing potentially dangerous incidents as police officers jump to try to quieten the din.

Greater Manchester Police have temporarily "binned" their new TETRA handsets as they have been proving unreliable in field service. Calls either couldn't be made when needed, or would be made and then the link would cease working properly. This meant officers needing to carry both the new TETRA handsets and the older analogue ones. This was leading to some operational difficulties.

As an interim measure the new TETRA handsets have been placed on one side and will not be routinely carried by officers until the suppliers have identified and implemented solutions to make the system work adequately in practice.

The GM Police are confident that their suppliers, led by MMO2 Airwave, will manage to work out how to make their system work effectively, and look forward to being able to use TETRA as envisaged by PITO and the Home Office, at some point in the future.

Powerwatch comment: The MMO2 TETRA system (BTAirwave) is using lower powers in the handsets, the vehicle radios and at the base-stations than TETRA was originally designed for. It is not clear why they are doing this (e.g. 1 watt handsets instead of 3 or 4 watt) other than to minimise any possible adverse health effects due to the 17.6 Hz pulsing bursts of microwaves that are emitted by the handsets, as higher powers would lead to a more robust telecommunications system. It is likely that far more base-stations than first envisioned will be required to make up for the lower powers being used. This is purely our surmise of what may be at least part of the problem.