Fluke CableAnalyzer DSP-4000 Series, User Manual

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DSP-4000 Series
Users Manual
C-8
Link Pulse
A single-bit, 100 ns test pulse that is transmitted at least every 50 ms during idle periods on
10BASE-T link segments to verify link integrity.
MUTO
Multi-user telecommunications outlet. A multiport outlet installed in the work area to
support a group of users. The MUTO cabling standard addresses the need for longer
sections of cable that allow more flexibility when wiring modular offices.
Near-End Crosstalk (NEXT)
The amount of coupling loss (in decibels) occurring when a signal generated at the near
end of one cable pair is received as crosstalk at the near end of another cable pair. Higher
NEXT levels correspond to better cable performance.
NVP
Nominal Velocity of Propagation. The speed of a signal through a cable, expressed as a
percentage of the speed of light. Typically, the speed of a signal through a cable is between
60% and 80% of the speed of light.
Packet
A group of bits in a specific format, containing a data message that is sent over a network.
Plenum Cable
Cable certified for installation in air ducts and open spaces over suspended ceilings
without conduit. Plenum cable is fire resistant and does not emit toxic fumes when burned.
Propagation Delay
The time required for an electrical signal to travel the length of a cable.
PSELFEXT
Power sum ELFEXT. Power sum FEXT minus the attenuation of the disturbed pair.
PSFEXT is the combined FEXT received by a cable pair from the other pairs.
PSNEXT
Power sum NEXT. The combined NEXT received by a cable pair from the other pairs.