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White Paper: Shortlinks Structured Cabling - Data Center - R&M

White Paper: Shortlinks Structured Cabling - Data Center - R&M

4. How to measure short

4. How to measure short permanent links? According to ISO/IEC 11801 Amendment 2 (Table A.5), less stringent requirements are applicable for short 2-connector permanent links with an insertion loss of less than 12 dB, from 450 MHz on up. Even if the range in question is 450 MHz and 500 MHz, the field measuring device should always be set to "Low IL". The maximum lowering of the NEXT requirement is 1.4 dB. Figures 3 to 6 show an example of a measuring arrangement and the results. Figure 3: Testing of short permanent link (configuration PL2) with the Fluke DTX 1800 Cable Analyzer. Figure 4: Test result. The permanent link of 2.1 m in length meets all requirements of ISO/IEC 11801. ((Für die englische Version müsste der Cable Analyzer auf Englisch eingestellt und abgebildet werden.)) White Paper | Short Links in Structured Cabling | v1.0 | ENG | Peter Fischer, Bruno Ritter 6

Figure 5: NEXT measuring of a permanent link of 2 m in length, set up with R&M components. Figure 6: RL measurement of the same permanent link. White Paper | Short Links in Structured Cabling | v1.0 | ENG | Peter Fischer, Bruno Ritter 7

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