IEC 62479 pdf download

IEC 62479 pdf download Assesment of the compliance of low-power electronic and electrical equipment with the basic restrictions related to human exposure to electromagnetic fields (10 MHz to 300 GHz)
1 Scope
This International Standard provides simple conformity assessment methods for low-power electronic and electrical equipment to an exposure limit relevant to electromagnetic fields (EMF). If such equipment cannot be shown to comply with the applicable EMF exposure requirements using the methods included in this standard for EMF assessment, then other standards, including IEC 6231 1 or other (EMF) product standards, may be used for conformity assessment.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
IEC 6231 1 , Assessment of electronic and electrical equipment related to human exposure restrictions for electromagnetic fields (0 Hz – 300 GHz)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
available antenna power
the maximum power, averaged over a time interval equal to the averaging time, supplied to the antenna feed line that can be theoretically delivered by a source having an impedance of positive real part to a directly connected load when the impedance of the load is widely varied
NOTE 1 The available antenna power is obtained when the resistance of the load is equal to that of the source and its reactance is equal in magnitude but of opposite sign. However, other scenarios are possible e.g. if the PA monitors the current rather than the actual power, a changing antenna impedance (when DUT is operated close to the body) might actually cause a higher output power than the matched load. Then, a push-pull analysis with varied realistic loads (according to antenna impedance in the vicinity of the body) should be performed.
NOTE 2 In some cases, conditions such as overheating or overvoltage prevent the available antenna power from being obtained.
NOTE 3 Time average shall be taken during continuous or maximum duty cycle transmission at maximum power to the extent possible for a given technology.
NOTE 4 Adapted from IEC 60050-702:1 992 [1 1 ] 1) , 702-07-1 0.
NOTE 5 Antenna feed line is defined by IEC 60050-71 2:1 992 [1 2], 71 2-06-01 .
3.2
average total radiated power
the time average of the total radiated power over a time interval equal to the averaging time.
This time average is taken during continuous or maximum duty cycle transmission at maximum power to the extent possible for a given technology