OMNIScanner User Guide
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Coaxial Measurements with OMNIScanner
Coax Tests
In coaxial cable, an insulated wire runs through
the middle of the cable and a second wire, called
the shield, surrounds the insulation of the inner
wire like a sheath. The outer insulation jacket wraps around the second wire.
The Coax Tests screen displays the measured Length, Termination, Imped-
ance, and Resistance.
The Length function measures the cable length. OMNI
Scanner
will display
the overall length in meters or feet. If NEF (No End Found) is displayed
instead of a value, the cable is either too long or terminated in its character-
istic impedance.
The Termination function displays whether a cable
is open or shorted .
When the field Length: displays NEF, the Termina-
tion will display .
Impedance defines the relationship of voltage and
current in an electrical circuit.
Each Cable or transmission line is designed to have specific impedance,
which allows proper matching to the currents of the transmitter and receiver.
OMNI
Scanner
measures the characteristic impedance of the coax cable in
Ohms.
OMNI
Scanner
displays the Resistance in Ohms.
Tracer/Toner
Tracer/Toner is a cable tracing function that assists in tracking cables
hidden in walls, ceilings, floors, or patch panels by generating a signal that
can be converted into an audible tone by Microtest’s Cable Tracer II (sold
separately) or any other equivalent tracing device.
1. Attach the end of the cable you want to trace to the OMNIScanner using
a patch cord and the Microtest Channel Adapter or the Microtest Link
Adapter. Make sure that the cable is not grounded, as a grounded cable will
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