Details on CAI Benchmarking Scheme for aerials
The Confederation of Aerial Industries (CAI) Benchmarking Scheme for aerials has been developed to categorise the minimum standards for the technical performance of domestic TV aerials based on the specific requirements for Digital Terrestrial Television (DTT) reception.
Conformance to the minimum standards is determined by independent measurement against a technical performance specification which includes the following parameters:
- Forward Gain
- Return Loss Ratio
- Directivity
- Cross Polar Protection
The benchmarking scheme covers the aerial only and does not cover the complete aerial installation or installation practice. Benchmarked aerials should always be used in conjunction with good installation practice as documented by the 'CAI Code of Practice for the Installation of Television and Satellite TV Reception Systems' and the recommendations in DTG R Book 2 'Installing Digital Terrestrial Television Domestic Systems', which can be downloaded from
www.dtg.org.uk.
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