The basis of the scheme is to lay down minimum standards for the technical performance of UHF TV aerials based on the specific requirements for satisfactory DTT reception. It is not intended to address general quality issues, such as standard of construction, durability etc., which can largely be assessed by visual inspection and from practical experience.

This CAI benchmarking schemes at the moment cover aerials and coaxial cables only. As yet they do not cover the complete aerial installation, or installation practice. Conformance to the minimum standards is determined by independent measurements against a technical performance specification.

These standards have been compiled by an industry wide committee who will monitor the implementation of the schemes through the CAI Inspectorate and agree any necessary changes to the detailed procedures, test methods, and specifications.
The scheme allows the measurements to be carried out by any test house that is able to demonstrate that it meets the required standards of measurement accuracy.

The use of the 'mark' will be authorised for specific products by the CAI, once the 'pass' certificate and supporting documentation has been issued by the test house – or in the case of aerials – by the CAI. Testing of random samples sold to installers or retailers will ensure ongoing conformance.

The Benchmarking Schemes are at the moment purely a voluntary arrangement within the industry. They are however expected to be widely adopted, following the success of the CAI Cable Benchmarking Scheme.

Reference may be made to specific types of CAI/DTG benchmarked aerials in manufacturers literature, purchasers' requirement specifications or supply contracts.

Benchmarked equipment should always be used in conjunction with good installation practice as laid down by the CAI Codes of Practice and the recommendations in DTG R Book 2.

Benchmarked Aerials are graded in Standards 1 - 4 and the following is a definition of those Standards.

Download the Benchmarked Aerial List & Guidelines for the use of Benchmarked Aerials Here

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