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OMNISCANNER User Guide
graphs for other pair combinations.
Press ESC to exit the ACR screen.
Resistance
Resistance is measured in a loop through each pair in the cable. In a
twisted pair cable, Resistance is measured by using OMNIREMOTE to short
the far end of the pair under test.
The RESISTANCE screen displays the Resistance
Limit and the test results in Ohms for each pair.
The result for each pair is tagged with a PASS or
FAIL indicator.
Press ESC to exit the RESISTANCE screen.
Power Sum NEXT
Like NEXT, Power Sum NEXT is a measurement of electromagnetic
coupling between adjacent pairs. While NEXT reports test results for
each pair combination, Power Sum NEXT is calculated from NEXT for
individual pair combinations and takes into account the crosstalk from
multiple transmission pairs. When reporting Power Sum NEXT,
OMNISCANNER displays results for pairs, rather than pair combinations.
The PS NEXT measurement is required to assure proper operation of
networks employing simultaneous transmission on more than one pair
in a link (i.e. Gigabit Ethernet).
In the POWER SUM NEXT screen, the worst case
margin for all near and far pairs is shown at the
top of the screen.
The pairs are displayed in the column on the left
side, followed by the PSNEXT in decibels (dB), the
margin/limit, and the frequency. The result for
each pair is tagged with a PASS , Marginal PASS
, Marginal FAIL , or FAIL indicator.
Press or to toggle between the PSNEXT results for OMNI-
SCANNER and OMNIREMOTE.
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