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SCAN-LAN 80 CABLE SCANNER
Crosstalk
— Noise coupled between pairs of wire in
twisted-pair cable.
dB
— Abbreviation for “decibel,” a logarithmic unit
of measure expressing the amplitude ratio between
two signals.
dB=20log(Vout)
Vin
Ethernet
— A high-speed LAN using Carrier Sense
Multiple Access with Collision Detection
(CSMA/CD). Ethernet is available with four cabling
alternatives: thin coaxial cable, standard (thick)
coaxial cable, twisted pair, and fiberoptic cable.
Jabber
— A network fault condition where one
station is continuously transmitting data (>20
milliseconds).
Link Pulse
— A single-bit test pulse transmitted by
stations every 2 to 150 milliseconds during idle
periods on 10BASE-T link segments. Used to verify
link integrity.
Near-end Crosstalk (NEXT)
— Noise coupled
between two twisted pairs measured at the same
end of the cable as the disturbing signal source.
