ACMA 400MHz Spectrum Review
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Wednesday, May 25, 2011

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During 2010 the regulator of radio frequency spectrum in Australia, ACMA, announced the results of a review into the 400MHz radio spectrum. This is the most widely used two-way radio spectrum in Australia. Some of the objectives of this review included:

•    Achieve more efficient use of the spectrum
•    Allow use of a broader range of technologies - specifically digital radio technologies

The results of the review include a reduction in channel bandwidths – mainly achieved by a mandatory reduction channel bandwidth in the 400MHz band to 12.5KHz - and updates to the assignment and coordination rules.

In the 450–470 MHz band, the 9.5 MHz frequency split precluded the use of TETRA.  The ACMA’s decision to change to a 10 MHz split will increase the range of technologies available for use in the band.

Some users in the 403-430 MHz band and 450-470 MHz will be forced to relocate; this could be as simple as reprogramming equipment or may require the replacement of existing equipment.

Licence taxes in high density markets are to be tripled - this can be substantially offset by most users by reducing bandwidth via the uptake of digital technologies.

Those that have been affected should have already been notified by the ACMA.

If you have any questions regarding the implications of these changes for your business please give us a call on 1300 852 929.