Identifying Modulated Light; Identifying Fibers In A Cable - HP E5970A User Manual

Identifying Modulated Light
This chapter describes how to use the power meter to identify different fibers in
a cable.
Identifying Fibers in a Cable
The HP E5970A Optical Power Meter recognizes signals modulated at 270Hz,
330Hz, IkHz, and 2kHz. The modulating frequency is shown at the bottom left
of the display.
The Modulation Indicator
The modulating frequencies recognized by the power meter are available from
the HP E5972A and HP E5974A sources, except for the 330Hz modulation. By
connecting one or more sources you can use the power meter to identify fibers
at the far end of the cable.
Note If you are not making absolute power measurements, for
example where you only need to identify the modulation
frequency, it is not necessary to set the value for the
-
wavelength.
If the power meter does not display the modulation, but does display -- in the
position of the modulation indicator, then the power of the incoming signal
Identifying Modulated Light 2-1