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Using the Multi-Wavelength Meter
Changing the Units and Measurement Rate
4 Press WL and select one of the following units. Then, press RETURN to complete
your selection:
• NM for nanometers
• THZ for terahertz
• CM
1 for wave number
–
5 Press POWER and select one of the following units:
• DBM for decibels relative to a milliwatt
• MW for milliwatts
• UW for microwatts
Measurement rate
Under normal operation, the Agilent 86120B makes a measurement and displays the
results about once every second. It is in this normal update mode that maximum
accuracy and wavelength resolution are achieved. However, should a faster update
be desired, for example when real-time feedback is required to tune a laser to its des-
ignated channel, the Agilent 86120B can be set to update approximately three times
per second. This reduces both wavelength resolution and accuracy but can be bene-
ficial in some applications.
When FAST update is selected, one less digit of resolution is displayed. Also, if mul-
tiple wavelengths are present, these individual responses, with the reduced resolu-
tion, may no longer be recognized.
To change the measurement speed
1 Press the Setup key.
2 Press the MORE softkey.
3 Press the UPDATE softkey.
4 Select either NORMAL or FAST.
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