Tdr - Pockethernet Manual

TDR

The TDR-based, single ended length measurement and fault locating tests
the physical properties of a cable, with just one end connected to
Pockethernet. See how long the cable is and if there are any short circuits,
split pairs or bad terminations. Pockethernet also detects if the cable is
connected to a switched off computer or switch.
The main status line shows the overall result of the measurement if each pair
in the cable is terminated the same way (e.g. all pairs are open or connected)
Status Possibe Faults
Open Cable is not connected to anything
Short Circuit
There's a short circuit somewhere in the cable
Connected to Cable is connected to a Ethernet port
ETH port
Bad
There's a bad termination. The cable might be connected to a broken
Termination
ethernet device/bad cableing installation
The length cannot be determined if the cable is connected to another
Ethernet port, as a properly terminated connection doesn't provide signal
reflections that can be measured. Also, switched on Ethernet ports on the
other end can provide false results as the other device is actively transmitting
signals that interfere with the measurement.
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