SNLA421 December   2022 DS320PR810 , SN75LVPE5412 , SN75LVPE5421

 

  1.   Abstract
  2.   Trademarks
  3. 1Introduction
    1. 1.1 Add-in-Card (AIC) Form Factor
  4. 2Compliance Tests
    1. 2.1 Workshop Test Results
    2. 2.2 Electrical Testing Results
  5. 3Electrical Performance
    1. 3.1 Effects of EQ Index on Time Domain Signal
    2. 3.2 Effects of EQ Index on the Eye Diagram
    3. 3.3 Effects of DC Gain on Time Domain Signal
    4. 3.4 Effects of DC Gain on the Eye Diagram
  6. 4Compliance Setting Fine Tuning
  7. 5Summary
  8. 6References

Effects of DC Gain on Time Domain Signal

The redriver output is also affected by the DC Gain applied to the signal; these effects on the time domain signal can be observed in Figure 3-4. Note that the EQ Index selected for these tests is the Default setting.


GUID-20221109-SS0I-9G7M-ZCLN-N9BB1MBZS8ZV-low.png

Figure 3-4 Time Domain Signal Comparison of DC Gain

As seen in Figure 3-4, adjusting the DC Gain mainly impacts the low frequency components of the time domain signal, either increasing the DC voltage level (at +2dB) or decreasing the DC voltage level (-4dB and -6dB). Notice that the high frequency components of the signal are minimally affected by adjusting DC Gain, and that amplitude of the long string of zeros or ones is reduced as gain approaches the -6dB DC Gain setting.