scope:

The present document presents an evaluation of maximum acceptable measurement uncertainty for Radio Frequency (RF) electromagnetic field (emf) measurements above the frequency one gigahertz (1 GHz) for inclusion within ETSI harmonized standards and radio product standards used for compliance testing.

The recommended maximum acceptable measurement uncertainty is given for the following measurement parameters:

• radiated RF power;

• radiated spurious emissions; and

• EMC radiated emissions.

The maximum frequency recommendations are based upon current capabilities of measurement equipment at May 2003 and the ability to calculate measurement uncertainty from traceable calibration certificates. Frequencies above the recommended maximum frequency for each method of measurement is for further study.

A recommendation is given on how to apply the laboratory calculated measurement uncertainty to a measured parameter and to assess the quality of the measurement against a defined limit given in a standard.

The present document contains the results of many discussions held with test equipment manufacturers, test laboratories, administrations, trade associations, societies, and members of the GRSC, all who have an interest in measurement uncertainty above 1 GHz.

In determining the maximum acceptable measurement uncertainty, particular account has been taken of current methods of measurement already identified in ETSI standards. However where there is an inconsistency, or uncertainties that have not previously been taken into account in the uncertainty budgets, these are clearly identified in the relevant clauses.

Whilst an analysis has been carried out on safety related measurements by ETSI, the responsibility for standards rests with CENELEC. The present document will include any recommendations from CENELEC TC 106X related to radiated measurements in a future edition.

Fixed link microwave methods of measurement do not use radiated measurements only conducted measurements (excepting EMC testing). Therefore they are considered outside the scope of the present document . However, as new technologies with integral antennas are being developed, this may be reviewed in a future edition. Satellite equipment is outside the scope of the present document, however, this may be reviewed in a future edition.

The measurement uncertainty for conducted measurements is outside the scope of the present document.

The use of a test jig for radiated RF measurements of integral antenna radio equipment is outside the scope of the present document.