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OMNISCANNER User Guide
Twisted Pair Measurements with OMNISCANNER
Wiremap
The Wiremap function tests twisted-pair cabling for proper wiring.
Your cabling configuration is checked for shield continuity, opens,
shorts, crossed pairs, split pairs, and reversed pairs. For each pair,
Wiremap displays the length.
The screen displays a graphical representation of the wiring in your
cable, where the near end wiring is shown on the left side, and
the far end wiring on the right side of the screen.
• A reverse video number indicates a split pair
• A straight line between pairs indicates a good
pair
• No line between wire pairs indicates an open
• An X between a wire pair indicates a reversed
pair
• A ] between wirepairs indicates a short
• The measured length of the pairs 1-2, 3-6, 4-5, and 7-8 are shown on
the left side.
In the example, OMNISCANNER displays split pairs on 1 - 2 and 4 - 5
(although they are wired straight through), a reversed pair 3 - 6, an
open on wire 7, and a short on wire 8 to the Shield.
Press ESC to exit the WIREMAP screen.
Length/Delay
The Length/Delay function measures a cable’s length, propagation
delay and skew. OMNISCANNER will determine whether the cable is open
or shorted.
The accuracy of the NVP (Nominal Velocity of Propagation) setting
determines the exactness of the Length measurements. The NVP speci-
fied by cable manufacturers is used for all the cables in OMNISCANNER's
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