Keysight Technologies 86120B, User Manual

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47
Using the Multi-Wavelength Meter
Displaying Wavelength and Power
Graphical display of optical power spectrum
A graphical display of optical power versus wavelength is shown from the start
wavelength value to the stop wavelength value. The start wavelength value is shown
in the upper left corner of the graphical display, and the stop wavelength value is
shown in the upper right corner of the graphical display. The power scale is a fixed
dB scale, with +10 dBm at the display top and –53 dBm at the display bottom. The
power scale is not affected by the Power Offset value. In most cases, the noise floor
will be visible if the total input power is greater than about –5 dBm.
The Agilent 86120B graphical display.
The Peak Threshold value is displayed as a dotted line. All peaks above this dotted
line are displayed in the List by Wavelength and List by Power modes. All peaks
below this line are not displayed. Adjust the Peak Threshold value with the Setup
key, and the
THRSHLD softkey.
The wavelength limit start and stop wavelength values are used for the graphical
display even if the wavelength limit function is off.
The graphical display cannot be printed.
To see the graphical display
1 Press the List by WL or List by Power key.
2 Press the GRAPH s oftkey.
3 To exit the graphical display, press any softkey.