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10 Mbps Ethernet

Waveforms of signal on a 10 Mbps Ethernet CAT5 cable (captured differentially on the RX+ and RX- wires):

For the info regarding how I managed to captured this waveform have a look at the usenet discussion here and the supporting info here.

Click on the image below to know how I forced my network card to operate in 10 Mbps mode only:


  1. From Thailand.

    I have studied the signals on UTP cable known as the Pulse signal and a 4-wire cable used for data transmission.
    So I asked.
    1. Signal you measured it as a data or a Power in ethernet line? Because I got a same your signal from measure in osciloscope . I do not really understand.
    2. How to measure it? I may be wrong osciloscope.

    really thankyou.


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