FCC 和 CE 能否使用 3m 測試 data 來發報告?能否接受用3m 測試 data 轉換為 10m 測試 data 來發報告?
CE Requirements
According to Clause 10.2.1 of EN 55022:1998, if the field-strength at 10m cannot be made because of high ambient noise levels, or for other reasons, measurement at a closer distance, such as 3m, is allowed. However, An inverse proportionality factor of 20 dB per decade should be used to normalize the measured data to the specified distance (10 meter, prescribed in Clause 6) for determining compliance.
FCC Requirements
According to Section 15.109 of FCC Part 15, both 3m limit and 10m limit are prescribed. In other words, both 3m measurement data and 10m measurement data are acceptable for FCC.