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Making Measurements
Measuring Wavelength and Power
Peak WL mode
When Peak WL is pressed, the display shows the largest amplitude line
in the spectrum. The word PEAK is shown on the screen. If multiple
laser lines are present at the input, the number of lines located will be
shown along the right side of the screen. In peak wavelength mode, the
Agilent 86120C can measure up to 200 laser lines simultaneously.
Figure 2-1. Display after “Peak WL” key pressed
In addition to the digital readouts, there is a power bar. It provides a
convenient analog “meter movement” for tuning laser power.
Although the Peak WL mode shows one signal at a time, softkeys are
provided that allow you to scroll through and display all the measured
laser lines. You can scroll through the list according to the wave-
lengths or powers measured.
To display peak wavelength and power
1 Connect the fiber-optic cable to the front-panel OPTICAL INPUT
connector.
2 To display the peak wavelength and power, do one of the following:
• Press the green Preset key.
• Press Peak WL.