Hi all,
I am working on an 10Mbps/100Mbps Ethernet device. On this device, I want to qualify the Ethenet signal quality. I use for this operation a dedicated application on an DSO.
This application reports two failures concerning rise/fall symmetry. The falling edge (4.907ns) is slower as the rising edge (4.38ns).
As I have no visible overshoot, I suppose that the impedance are matching. I imagine that this dissymetry comes from the PHY driver stage.
But is there a way to reduce this dissymetry as I can not change the selected PHY?
Thank you in advance for the help.
Etienne