Transcription of ADSL Power Spectrum Density (PSD) Calculation
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ADSL Power Spectrum Density (PSD) Calculation
Application ReportSPRA955 - September 20031 ADSL Power Spectrum Density CalculationRyan Yi WangABSTRACTThis article describes how to measure ADSL transmission Power Spectrum Density (PSD),and how to calculate signal voltage based on PSD. These calculations can help in designingover voltage protection circuits for ADSL and in debugging ADSL analog PSD Mask in .. 2 DSL Transmission PSD Measurement3.. 3CO PSD Calculation3.. 4 CPE PSD Calculation4.. 5 Conclusion5.. 6 References5.. Appendix A7.. Key Words7.. List of FiguresFigure 1. ATU-C Downstream Transmission Spectral Mask [Ref ]2.. Figure 2. ATU-R Transmission spectral mask [Ref ]2.. 1 Transmission PSD Mask in defines both ATU-C and ATU-R transmission maximum PSD masks as shown in Figure 1and Figure 2. The purpose of the limitation of the PSD mask is to reduce cross-talk noise and tolimit Power 1 shows the ATU-C downstream transmission spectral band for DSL is from 25 kHz to 1 104 kHz.
SPRA955 ADSL Power Spectrum Density Calculation 3 2 DSL Transmission PSD Measurement Both the central office (CO) and the customer premise equipment (CPE) should guarantee that
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