Advantech DVMB-554E 用户手册

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3.10  Frequency / Voltage Control 
 
 
 
Figure 3.14: Spread Spectrum Control screen 
 
3.10.1 Spread Spectrum 
This setting allows you to reduce EMI by modulating the signals the CPU 
generates so that the spikes are reduced to flatter curves. This is achieved 
by varying the frequency slightly so that the signal does not use any par- 
ticular frequency for more than a moment. The choices are “Disabled” 
and “Enabled”.