This Standard ECMA-95 applies to Information Technology Equipment (ITE) as defined in 1.4.1. ITE is subdivided into two categories denoted Class A equipment and Class B equipment.
– Class A Equipment Class A equipment is information technology equipment which satisfies the Class A interference limits but does not satisfy the Class B limits. In some countries, such equipment may be subject to restrictions on its sale and/or use.
NOTE 1 – The limits for Class A equipment are derived for typical commercial establishments for which a 30 m protection distance is used. The Class A limits may be too liberal for domestic establishments and some residential areas.
– Class B Equipment Class B equipment is information technology equipment which satisfies the Class B interference limits. Such equipment should not be subject to restrictions on its sale and is generally not subject to restrictions on its use.
NOTE 2 – The limits for Class B equipment are derived for typical domestic establishments for which a 10 m protection distance is used.
Procedures are given for the measurement of the levels of spurious signals generated by the ITE and limits are specified for the frequency range 0,15 MHz – 1000 MHz for both Class A and Class B equipment.