Keysight N777-C Series Tunable Laser Family User’s Guide 65
N777-C Web User Interface Reference 4
How to set Wavelength?
How to change the Wavelength
There are three ways to set the wavelength of the Tunable Laser.
• You can set the wavelength directly on clicking the Wavelength button,
see Changing Wavelength, Power and Units on page 63.
•You go the Settings > Measurement Settings and then set the
wavelength, or
• You can click on the graph to set a wavelength.
Wavelength Range
Every Tunable Laser instrument has a specified wavelength range. This
range is available for all Tunable Laser instruments. See the Laser Safety
Information on page 15 to find your instrument’s specified range.
Every Tunable Laser instrument has a permitted wavelength range. This
range is greater than the specified range. The permitted wavelength range
varies for each Tunable Laser instrument. You can set the wavelength to
any value within the permitted wavelength range.
How to Set Power?
How to change the power
There are three ways of changing the power:
• You can set the power directly on clicking the Power button, see
Changing Wavelength, Power and Units on page 63.
•You go the Settings > Measurement Settings and then set the power,
or
• You can click on the graph to set a power.
How to Set the Power Unit
Pressing the unit button allows you to switch either mW or dBm as the
units in which power is displayed.
What are the Power Units?
Watts (W) are the SI unit for power measurement.
You can also measure power in dBm. Values displayed in these units are
derived from measurement in Watts.
By selecting dBm, the following calculation is made:
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