Checking twist pair relationships in short cables

Configuration
CAMI offers the CableEye suite of products complete with accessories - including plug-in connector boards. The stock library of these test fixture boards is constantly growing and is currently numbering over 60 - most of which are populated with families of connectors. When pre-populated boards are used, the tester GUI automatically displays a graphic of the connectors and wiring under test.

The tester can be readily programmed to do the same for custom boards and fixtures. These boards are designed to fit all CableEye testers. Five boards in the CAMI library presently have Ethernet sockets where twisted pair cables may be used: CB1, CB15, and the CB18, CB18A, and CB18C.

With a single click, the wiring schematic can be switched to a customisable netlist view which can be set to display wiring colours.

In both views, a large PASS/FAIL indicator is clearly visible. When checking twist pair relationships, a PASS indicator shows that the wire resistances comply with the threshold and that the wires are paired correctly. If a capacitance value has been entered in the Match Data, then the values shown in the Test Data are within the capacitance tolerance set in the Tester tab.

Twist pair relationships can be checked in this way in cables as short as six feet. The same circuitry allows for measuring cable length longer than six feet, distances to break when six feet or more away, and polarised and unpolarised capacitors.

Capacitance measurements acquired during the twist pair check on reels and cables are auto-saved and can be used to verify reel-to-reel and cable-to-cable consistency and quality. All connection measurements are logged for record keeping and analysis.