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PCI Express EMI Design Guide.p...

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PCI Express EMI Design GuidePCI Express EMI Design Note

1

Spread Spectrum Clock Method
SSC reduces radiated emissions by spreading the radiated energy over a wider frequency band

2

Spread Spectrum Clock Method Note
The bit rate clock source for transmitter and receiver must be ± 300 ppm or better During SSC is used, the data rate must be down-spread And modulated no more than 0.5% of the nominal data rate frequency During SSC is used, the modulation rate must not exceed the range of 30KHz
标签:ExpressDesignGuide
PCI Express EMI Design Guide.p...
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