Cirrus Logic CRD44600-PH-FB User Manual
Page 11
CRD44600-PH-FB
MAR '05 DS633RD1
11
and Figure 5. The power supply earth ground was connected to the board chassis ground
at a single point.
A CD-player with an optical fiber connection was used a signal source. A constant 0-
dBFS, 1-kHz sine wave was used as the test signal and the board volume was set so that
the output to the resistive loads was 1/8th of the full scale output level, or 12.5 W.
The test results shown in Figure 6 and Figure 7 are pre-screened radiated EMI test results
from an antenna placement of 3 m in an anechoic chamber. The test results shown in Fig-
ure 8 are preliminary power line conducted test results.
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