Reflection with decay

A fast step is applied to one end of an RG-58 cable (channel 1).  The other end (channel 2) is open, causing the signal to reflect back to the transmitter.  The transmitter consists of a pullup resistor and a fast relay which shorts the line.  There is a short cable connecting the transmitter to the RG-58 between the two oscilloscope channel so there is a brief delay between the reflected signal reaching channel 1 and another reflection coming from the shorted relay contacts.

The exponential decay caused by losses in the cable is clearly visible here.

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