Main concept, Mportant – EXFO FVA-3150 Variable Attenuator User Manual
Page 11
Introducing the FVA-3150 Variable Attenuator
Variable Attenuator
5
Main Concept
Main Concept
The significance of the attenuation value displayed by an optical attenuator
may differ from one manufacturer to another. At EXFO, for example, the
attenuation displayed by the FVA-3150 Variable Attenuator is the actual loss
or attenuation between the input and the output ports of the Variable
Attenuator, including the loss of its own internal connectors, after
performing a reference reading with a power meter.
I
MPORTANT
The Variable Attenuator has been calibrated with a light source
connected to the input port and a power meter connected to the
output port. For optimum performance, do not interchange the
input and output connections.
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