4.3.4 Ambient electromagnetic level.
testing, the ambient electromagnetic level measured with the EUT de-energized
and all auxiliary equipment turned on shall be at least 6 dB below the
allowable specified limits when the tests are performed in a shielded
enclosure. Ambient conducted levels on power leads shall be measured with the
leads disconnected from the EUT and connected to a resistive load which draws
the same rated current as the EUT. When tests are performed in a shielded
enclosure and the EUT is in compliance with required limits, the ambient
profile need not be recorded in the EMITR. When measurements are made outside
a shielded enclosure, the tests shall be performed during times and conditions
when the ambient is at its lowest level. The ambient shall be recorded in the
EMITR and shall not compromise the test results.