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OMNIScanner User Guide
displayed for the frequency indicated by the cursor position.
Press (Pairs) to view Return Loss graphs for
other pairs.
Press (Diagnostics) to display the TDRL
screen, where cabling and/or connection faults can be
identified.
(See Chapter 6 - Diagnostics: Using TDRL
to diagnose a Link for further information.)
Press ESC to exit the RETURN LOSS screen.
ELFEXT
ELFEXT (Equal Level Far End Crosstalk) measures the electromagnetic
coupling at the far end and normalizes the result to account for the cable’s
attenuation. ELFEXT is reported in dB and results are computed for twelve
pair combinations at the OMNI
Scanner
and the OMNI
Remote
end of the
cabling.
In the ELFEXT screen, the worst case margin for all near and far pair
combinations is shown at the top of the screen.
The pair combinations are displayed in the column on the left side, followed
by the ELFEXT value, the margin/limit and the
frequency. The result for each pair combination is
tagged with a PASS , Marginal PASS , Marginal
FAIL , or FAIL indicator.
The scrollbar indicates that there are more test
results. Use the ê on OMNI
Scanner
’s keypad to
scroll through the list and view results for the other six
pair combinations.
Press or to toggle between the
ELFEXT results for OMNI
Scanner
and OMNI
Remote.
Press (Graph) to display the ELFEXT graph for
the currently highlighted pair combination. ELFEXT is
displayed for the frequency indicated by the cursor
position.