Levenhuk Ermenrich NetGeeks NL80 Guia Del Usuario página 6

Cable length measurement
This function is used to measure the length of a cable and also the distance to a short circuit if there is one. This function also shows if there
are any wiring connection problems such as a short circuit or open connection.
Calibration
Plug one end of the cable (min. 20–50m) with a known length into a corresponding port on the transmitter (RJ45 MAIN port for a network
cable) and leave the other end of the cable disconnected. Select Length on the main page and press the OK button (8). Choose the required
cable type and then select Calibration. Adjust the result if needed using the ▲ and ▼ buttons and press the OK button (8) to save the data.
!
For more precise results, it is recommended to calibrate the device on a cable with a known length from the same manufacturer.
Usage
Plug one end of a tested cable into a corresponding port on the transmitter and leave the other end of the cable disconnected. Select Length,
choose the required cable type and then select Load data. Choose the calibration result that you need from the list and press the OK button
(8) to load it. Press the Back button (9) to return to the main menu.
Select Length and choose the required cable type. Then select Length and press the OK button (8) to test.
Possible outcomes are shown below:
Normal (coaxial cable)
!
If the results for each pin differ noticeably, consider the result for pin 3 to be the reference value for the network cable length
(the pin 4 result for a telephone cable and the pin 2 result for a coaxial cable respectively).
If an open connection is detected in the cable, the device will show the twisted pairs that have a wiring connection problem:
Measurement with the transmitter (pair 3–6 has a proper connection; pairs 1–2, 4–5, and 7–8 have an open connection)
To identify the exact pins that have no connection, plug the other end of the measured cable to a corresponding port on the remote unit:
Measurement with the transmitter and the remote unit (pair 3–6 has a proper connection; pins 1, 5, and 7 have an open connection)
PoE test
This function is used to identify the pins that provide PoE and to measure PoE voltage. Plug one end of the cable or the RJ45 patch cord (included)
into the PoE/Ping port (6) on the transmitter and the other end into the PoE source equipment (such as network switch, router etc.). Select PoE in
the main menu, and then select Start to measure the PoE voltage.
Possible outcome is shown below:
Short (telephone cable)
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