Quanta Computer WM1, Emi Test Report

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ETC Report No. : ET90S-11-032 Sheet 19 of 104 Sheets
FCC ID. : HFSWM100
Rev. No 1.0
5 CONDUCTED EMISSION MEASUREMENT
5.1 Standard Applicable
For unintentional and intentional device, Line Conducted Emission Limits are in accordance
to 15.107(a) and 15.207(a) respectively. Both Limits are identical specification.
5.2 Measurement Procedure
1. Setup the configuration per figure 3.
2. A preliminary scan with a spectrum monitor is performed to identify the frequency of
emission that has the highest amplitude relative to the limit by operating the EUT in
selected modes of operation, typical cable positions, and with a typical system
configuration.
3. Record the 6 or 8 highest emissions relative to the limit.
4. Measure each frequency obtained from step 3 by a test receiver set on quasi peak detector
function, and then record the accuracy frequency and emission level. If all emissions
measured in the specified band are attenuated more than 20 dB from the limit, this step
would be ignored, and the peak detector function would be used.
5. Confirm the highest three emissions with variation of the EUT cable configuration and
record the final data.
6. Repeat all above procedures on measuring each operation mode of EUT.
Figure 3 : Conducted emissions measurement configuration
E U T
L I S N
T e s t R e c e i v e r
R e f e r e n c e G r o u n d P l a n e
V e r t i c a l R e f e r e n c e
G r o u n d P l a n e