user manual

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CHAPTER 5: Measurements
When OMNIFiber is attached to OMNIRemote, the remote unit can be used as
a light source. With the OMNIFiber adapter attached, press the lambda key to
activate the light source and provide continuous or modulated light at 850 or
1300/1310 nm. The green LED of the appropriate wavelength will blink rapidly
when modulated light is transmitted. If the transmitted light is continuous, the
green LED will not blink.
Press to find the reference value, place it in the appropriate field, and
start calculating the loss.
Press ESC to exit the Power Meter screen.
5.5 Coaxial Measurements with OMNIScanner
C OAX T ESTS
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, Impedance, and
Termination.
The Length function measures the cable length. OMNIScanner 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 characteristic impedance.
Impedance defines the relationship of voltage and current in an electrical
circuit.