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OMNISCANNER User Guide
signal which is monitored on each of the other pairs. The received
signal is compared to the transmitted signal and the difference is
reported as the NEXT value in dB. When measuring the NEXT for the
OMNIREMOTE end, the roles of the two units are reversed. OMNISCANNER
provides the termination; OMNIREMOTE transmits and measures the
signal.
In the NEXT 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 mea-
sured NEXT value, margin/limit, and frequency.
The result for each pair combination is tagged
with a PASS , Marginal PASS , Marginal FAIL , or FAIL
indicator.
Press or to toggle between the NEXT results for
OMNISCANNER and OMNIREMOTE.
Press (Graph) to display the NEXT graph for
the highlighted pair combination. NEXT is dis-
played for the frequency indicated by the cursor
position.
Press (Pairs) to view NEXT graphs for other
pair combinations.
Press (Diagnostics) to display the TDNXT screen, where cabling
and/or connection faults can be identified. (See Chapter 6 - Diagnostics:
Using TDNXT to diagnose a Link for further information.)
Press ESC to exit the NEXT screen.
Attenuation
The Attenuation function measures signal loss in
a cable as a function of frequency. OMNIREMOTE
generates and injects a signal at the far end of the
cable. OMNISCANNER measures the signal at the
other end of the cable to determine cable loss.
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