11elec t r omagne t ic c ompa t ibili t y3.These are Class A products. In a domestic environment these•products may cause radio interference in which case the usermay be required to take adequate measures.The electromagnetic emissions of the devices are below the•standardized limit values for interferences. However we cannotguarantee a complete protection against disturbance of radioand TV reception, if the devices are applied in business- andliving areas in a distance of less than 33 ft from the receivingaerial.Installation and maintenance should be carried out by EMC-•skilled personnel.Special hints concerning the cabling•USB-, PS/2-, parallel and drawer cables may not exceed•10 ft. This restriction does not apply to RS232- andnetwork cables.You should always use shielded cables. Unshielded•cables must have a ferrite core mounted as close to theVectron POS unit as possible.