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Nemko USA, Inc.
11696 Sorrento Valley Road, Suite F, San Diego, CA 92121
Phone (858) 755-5525 Fax (858) 452-1810
DATE
DOCUMENT NAME
DOCUMENT #
PAGE
Janurary 5,2006
Harman Multimedia OnStage UD CE Test Report
2006 011114 CE AUS/NZ
18 of 72
3.3. Configuration and Methods of Measurements for Frequency Identification
When performing all testing of equipment, the actual emissions of the EUT are segregated from ambient
signals present within the laboratory or the open-field test range. Preliminary testing is performed to ensure
that ambient signals are sufficiently low to allow for proper observation of the emissions from the EUT.
Ambient signals within the laboratory are compared to those noted at the nearby open-field site to
discriminate between signals produced from the EUT and ambient signals. In the event that a significant
emission is produced by the EUT at a frequency that is also demonstrating significant ambient signals, the
spectrum analyzer is placed in the peak mode, the bandwidth is narrowed and the EUT's signal is centered on
the analyzer. The scan width is expanded to 50 kHz while monitoring the audio to ensure that only the EUT
signal is present, the analyzer is switched to quasi-peak mode, and the level of the EUT signal is recorded.
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