fluke测试方法.ppt

* Back when we discussed the signaling schemes used for Ethernet, we referred to the 4 Level system that was used for 1000Base-T. As you have learned here today, there are several noise sources that can distort a data signal and the complexity of bi-directional full duplex signaling combine to work against the data link receiver. With that, we are packing more data throughput by establishing several voltage levels for the receiver to interpret as valid data bits. So in addition to Attenuation, NEXT and ACR established by TSB-67 to support earlier Category 5 systems and earlier Ethernet schemes (10Base-T, 100Base-T), the TIA has added ELFEXT and Return Loss to a revised Category 5, new Category 5e and proposed Category 6 systems to accommodate develops and standards for new LAN technologies such as 1000Base-T and what may follow. * * Hands on, students will follow through each steep Note setup difference between Copper and Fiber 1. View / delete test reports - have students view a report if available. 2. Delete all test reports - have students delete all reports 3. Tone Generator - explain 4. Determine cable NVP - explain 5. Battery status - have students check the batteries 6. LIA status - Show the status 7. Self calibration - have students calibrate the unit 8. Self test - have students do this test 9. Memory card configuration - explain 10. Version - explain how to up date to current version and why * First have the class go through a calibration procedure. Point out how quick and easy it is. Also point out that you only have to do it once per month (recommended), not every day or every time you turn a unit off and on like some “other” testers on the market (those attendees who use our competitors product may nod knowingly) As with any test tool, a service plan should be purchased and most plans cover yearly factory calibration to keep the unit functioning to factory standards. * * Now have the class connect the tester to the spools in the c