Fluke Networks DSX Series Coaxial Adapter

ANSI/TIA-568-C.4 specifies requirements for 75 ohm broadband coaxial cabling to support CATV television, and other applications supported by the star topology defined by ANSI/TIA-568-C.0. In this topology, the cabling segment between the Equipment Outlet and the first Distributor (typically, a splitter) is referred to as Cabling Subsystem 1. Cabling segments between Distributors are referred to as Cabling Subsystem 2 or 3. Both Series 6 (RG6) and Series 11 (RG11) cabling is supported. The length limit for RG6 cabling is 46m (150 feet) for all three Cabling Subsystem. The length limit for RG11 cabling is 90m (285 feet) for Cabling Subsystem 1, and 100m (328 feet) for cabling Subsystem 2 or 3. For each Cabling Series and length limit, TIA-568-C.4 provides limits for Insertion Loss over the frequency range of 5 to 1002 MHz which can be tested using the DSX-CHA003 Coax Adapter. Actual Insertion Loss performance is strongly influenced by the length of the installed coaxial cabling segment. A segment much shorter than 90 meters may meet the limit for a 90m link even though its performance has been significantly degraded by damage to the cable or poorly installed connectors. For this reason, DSX-5000 also provides Length-Scaled test limits which automatically adjust the Insertion Loss limit across the specified frequency range based on the actual measured length of the cabling segment. These Length-Scaled test limits can be recognized by the "LS" at the end of the test limit name.