Test twisted pair jumper
Twisted pair jumper is widely used in information outlet to the computer, patch panel to the switch connection, the connection between the switch and the connected switches and routers, switches and fiber optic transceivers to connect, so the jumper willlink directly affect the network connectivity.
Will need to insert one end of the test pair on the micro-scanner "MAIN" port and the other end into the "LOOPBACK" port, or adapter into the cable map.Press "ON / OFF" button to open the power switch.Pressing the "MODE" button until appears on the LCD screen "WIREMAP" word.At this point, the test results will be displayed.The results are expressed in figures, the top row figures show the micro-scanner plugs (plug in the MAIN port) line is detected, the following line displayed is the actual wiring.
● properly connected
● Connection Error
When failure, the LCD display will show "FAULT" message.Shown in Figure 2 as "the first 3-6 of the" backward on the line fault, however, this jumper is the so-called cross-line, was used for switches, hubs cascaded common port.Shown in Figure 3 as "the first 4-5,3-6 on the" cross-fault on the line shown in Figure 4 as "the first 4-5,3-6 on the" separation of line failure.
● open and short circuits
When the barrier at both ends of the line, that circuit, the barrier line corresponding indicator will be blank pin number, the LCD display will show "Open" message.When the two lines in the house connected to the short circuit, short circuit, the corresponding pin number will become the brackets, the LCD display will indicate "Short" word.
Overall test link
Connected with the switch when the computer problems, it is recommended to link the entire test.Test jumpers with different ends of the link as far away from the whole, can not simultaneously into the two port test MicroScanner Pro, so must resort to the adapter and two RJ-45 jumper to complete the test.To test the link to the jumper, disconnect from the switch connected to the adapter, unplug from the computer the other end, connected to the tester.Then, the jumper can be as general as the test to test the link connectivity.
Distribution to the information outlet connection test
Completion of network cabling After putting the test patch panel connectivity to the information outlet to test the quality of wiring, you must resort to the adapter and two RJ-45 jumper to complete the test.Two jumpers will want to test the links are connected to the information outlets and patch panels, and then, in accordance with the overall test program of the link, you can achieve a test of the link.Note that, in the connectivity test should be preceded by two jumpers on the connectivity test.
Test cable length
Whether it is Ethernet, Fast Ethernet or Gigabit Ethernet, the length of the line have made specific requirements - maximum length is 100 meters.So, how to determine whether the cable is installed over the required length of it?MicroScanner Pro with TDR technology, the length can be accurately measured, making it easier to determine whether the standard cable length.
Step 1, plug network cable.Will need to test (or known length) into the twisted end of the micro-scanner on the "MAIN" port, the other side vacant.
Step 2, the calibration NVP value.NVP (nominal transmission speed) is the signal in the cable transmission ratio of the speed and the speed of light, usually expressed as a percentage of the speed of light, NVP must be set correctly in order to accurately measure the length of the cable.
Enter the calibration state.Press "ON / OFF" button to close MicroScanner Pro.Then, hold down the "MODE" button and press the "ON / OFF" button to enter the calibration state.Once the calibration state, the LCD screen will display the system default NVP values, and the full length of the cable.Cable length at this time, is stored in the NVP calibration.
Set NVP.If you know you are using the cable NVP, you can use the "▲" or "" button to directly modify the value.At this point, the cable length will automatically recalculate a new set of NVP.If this time you insert a port MicroScanner Pro is known length of cable, you can also use the "▲" or "" button to adjust the NVP value, so that the measured length of cable consistent with the known length, so as to achieve the value of the calibration NVPpurposes.
In the calibration mode, press the "MODE" button to display the length of the unit will switch between feet and meters.Once the required cable length or NVP is displayed on the LCD screen, you can press the "ON / OFF" button to end the "calibration" state, and store the new calibration coefficients.Since then, MicroScanner Pro will be the subject of the coefficient measuring the length of the wire until the next re-calibration date.Note that the values used to calibrate the cable NVP not be shorter than 15 meters.
Step 3, measure the cable length.To measure the network cable into the micro-scanner on one end of the "MAIN" port, press "ON / OFF" button to open the MicroScanner Pro, press the "MODE" button until the LCD displays "LENGTH" word whenThe length of cable can be displayed.Press "▲" or "" button to see the pair, respectively, the length of the line.