The FCC Part 15 rules and the requirements of CISPR 22 have been harmonized and either standard, with minor exceptions, can be used to certify digital electronic equipment. Harmonization requires that the same standard be used for both conducted and radiated emissions. Measurements made above 1000MHz must be made in accordance with FCC rules and limits since CISPR 22 has no specified limits for frequencies above 1000MHz. Conducted and radiated emission limits specified in FCC Part 15 and CISPR 22 are within a few dB of each other over the prescribed frequencies, so using either set of limits does not compromise accuracy of the measurement and certification process. FCC limits are given in μV and CISPR limits are given in dBμV, so conversion of the units for one set of limits is necessary for direct comparison.