Fluke OMNIFiber, User Manual

Page: 73 / 136

OMNIS
CANNER
User Guide
5 - 6
library. When creating or editing cables, the NVP value can be custom-
ized. (See Chapter 4 - Setup:
Cables for further information.)
Delay is a measure of the time required for a pulse to travel from one
end of the link to the other. OMNIS
CANNER
measures the delay from
when the pulse was sent to when the reflection was received. Knowing
the speed that the pulse propagates down the cable (NVP), OMNIS
CANNER
then calculates the length of the cable.
Skew is the difference OMNIScanner pairs with the longest and shortest
delay.
The LENGTH/DELAY screen shows the test result
information for all pairs.
The Limit is displayed at the top of the screen.
The pairs are displayed in the first column fol-
lowed by small icons to indicate whether the pair
is open
or shorted .
The measured Length and the Delay are displayed for each pair. The
result for the shortest pair is tagged with a PASS
or FAIL indica-
tor.
OMN ISca nnerEnd Found) is displayed instead of a value the cable is
either too long or properly terminated.
The length result can be displayed in meters or feet (See Chapter 4:
Setup -
User Options for further information.)
Delay is displayed in nS (nanoseconds).
The Skew value and thOMNIScannerit are displayed right below the
pairs.
Press ESC to exit the LENGTH/DELAY screen.
NEXT
The NEXT (Near End Crosstalk) function measures the electromag-
netic coupling that occurs between pairs at the near end. OMNIS
CANNER
and OMNIR
EMOTE
allow NEXT to be measured at both ends of the link
without having to swap ends.
OMNIR
EMOTE
functions as a terminator while OMNIS
CANNER
transmits a