SI2457-D-FS Silicon Laboratories Inc, SI2457-D-FS Datasheet - Page 279
SI2457-D-FS
Manufacturer Part Number
SI2457-D-FS
Description
IC ISOMODEM SYSTEM-SIDE 16SOIC
Manufacturer
Silicon Laboratories Inc
Specifications of SI2457-D-FS
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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AN93
Audio Playback and Analysis
Below are two displays showing the results of recording a good V.22 transaction using Adobe Audition. We need to
examine the signal both in the time domain and the frequency domain, with the frequency domain being a much
more useful view. The graphs below show time on the horizontal axis and either wave energy in dB or Frequency in
Hz on the vertical scale. In the frequency display, the color of the wave indicates the energy at that combination of
elapsed time and frequency. The color scheme is programmable. It is typical in the temporal view to see a dc offset
until one applies a high-pass filter, a step that is rarely necessary.
Figure 58. Adobe Audition Temporal View of a Good V.22 Transaction
Rev. 1.3
279
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