How should I adjust the 560pF capacitor in the transmit interface?
The main purpose of the transmit 560pF capacitor is to slightly increase the high frequency transmit return loss. Typical applications already have a substantial amount of parasitic capacitance. Sources of parasitic capacitance are the protection elements, common mode chokes, long PCB traces and connectors. Too much capacitance might cause some slight ringing in the output pulse. In these cases, the designer is advised to reduce the 560pF capacitor. However, for most practical situations, a 560pF capacitor will provide good results.
Related Questions
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