LANTEK User Manual - Ideal Industries
LANTEK User Manual - Ideal Industries LANTEK User Manual - Ideal Industries
Chapter 3 Structured Cable Field Calibration and Testing The following troubleshooting tips identify typical cable conditions and their corresponding screen plots. Condition Open, Near End Short, Near End Open, Far End Short, Far End Split Pair Cable segment with higher than nominal impedance Cable segment with lower than nominal impedance Level Plot, much higher than the known cable NVP No distinct upswing or downswing at the Far End TDR Plot Indication Upswing develops early. In comparison to good cable pairs, this pair appears shorter in length. Downswing develops early. In comparison to good cable pairs, this pair appears shorter in length. Fully developed upswing at the Far End. Fully developed downswing at the Far End. 20% to 30% rise in relative impedance at the split with a corresponding drop in impedance where the pair is reconnected. Peak in the level area of the plot. Dip in the level area of the plot. Wrong cable type selected, or wrong cable type installed. Matched terminator attached to the cable. The pair appears to have a very long length. STORING, RETRIEVING, AND DELETING TDR RESULTS Storing a Graph The TDR results can be stored in the Current Job. 1. Press the UP/DOWN ARROW keys to select the desired cable pair graph. 2. Press SHIFT key to save/print. 3. Select . The Save Test screen appears. Press SHIFT to bring up the “Save As” or “Rename” selection if the test has already been stored. 4. The test name is automatically assigned. If a different name is desired, press DELETE to change the highlighted character(s). 5. When you have entered the name, press ENTER to accept the changes and return to the ready screen. Retrieving or Deleting a Graph For detailed instructions regarding retrieving or deleting stored TDR results, refer to Viewing or Deleting Stored Autotest Results. 3-38
Chapter 3 Structured Cable Field Calibration and Testing TROUBLESHOOTING 10/100/1000 BASE-T 10/100/1000 BASE-T Ethernet systems use twisted pair cabling for transmission of network data frames. Both the cable and connecting hardware must meet minimum standards as specified in the IEEE 802.3 standard. The default settings for 10BASE-T network links in the LANTEK tester reflect these standards. 10/100 BASE-T systems use the 1 and 2 pins for transmit and the 3 and 6 pins for receive, as shown in Figure 7-5. The instrument passes or fails the Wire Map based on this pin configuration. If your system does not use the IEEE 802.3 wiring standard, a custom adapter is required to align nonstandard transmit and receive pairs. 1000 BASE-T systems use all four pairs in a full-duplex (bi-directional) configuration. Figure 3-26: 10BASE-T Connector 3-39
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Chapter 3<br />
Structured Cable Field Calibration and Testing<br />
TROUBLESHOOTING 10/100/1000 BASE-T<br />
10/100/1000 BASE-T Ethernet systems use twisted pair cabling for transmission of<br />
network data frames. Both the cable and connecting hardware must meet minimum<br />
standards as specified in the IEEE 802.3 standard. The default settings for 10BASE-T<br />
network links in the <strong>LANTEK</strong> tester reflect these standards.<br />
10/100 BASE-T systems use the 1 and 2 pins for transmit and the 3 and 6 pins for<br />
receive, as shown in Figure 7-5. The instrument passes or fails the Wire Map based on<br />
this pin configuration. If your system does not use the IEEE 802.3 wiring standard, a<br />
custom adapter is required to align nonstandard transmit and receive pairs.<br />
1000 BASE-T systems use all four pairs in a full-duplex (bi-directional) configuration.<br />
Figure 3-26: 10BASE-T Connector<br />
3-39