ARLA/CLUSTER: Canal de chamada em FM e/ou Voz Digital no Reino Unido

[João Gonçalves Costa]

O Plano de banda da IARU para a Região 1 para 2m considera-se que:
145,375 MHz  - digital voice calling

145,500 MHz - (mobile) calling

The 145.500 MHz FM Calling channel

The RSGB has received a number of complaints that relate to an error in the 2m part of the RSGB Band Plan. This error was mentioned in the VHF Manager's Annual Report in the April RadCom, page 53.

It concerns the incorrect designation of the 145.500MHz simplex channel as Mobile Calling and its dual FM/ Digital Voice usage. Whilst these arrangements were put in place shortly after the 2008 IARU Region 1 General Conference, there have not been many problems reported.

Increased uptake of Digital Voice, coupled with its use on 145.500MHz in some parts of the country, has highlighted an incompatibility. FM users monitoring the calling channel get disturbing noise bursts when a Digital Voice transmission occurs, making background channel-monitoring unacceptable.

The Society will raise this issue within IARU Region 1 at the next opportunity, meanwhile UK amateurs using Digital Voice are asked not to use 145.500MHz, and are reminded that their Digital Voice calling channel is 144.6125MHz.

In the interests of cooperation, both FM and Digital Voice users are asked to listen before transmitting on the other simplex channels to ensure that they are clear before use.

GB2RS


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