11-2
IM AQ1200-01EN
11.1 Making Preparations and Adjustments for Loss Testing
Explanation
This feature is available on models with the /SLT or /HLT option.
Models with the /PPM option do not have the Auto Loss Test feature, so combine these models with
a light source and the optical power meter feature to perform the loss test. For details, see chapters 8
and 9. Additionally, on the AQ1200B and AQ1200C models with the /PPM option, the wavelengths of
the light source and the optical power meter are different, so you cannot perform the loss test with a
single unit. Use a model (sold separately) that has a light source whose wavelength is compatible (such
as the AQ1200A, or AQ1100 series).
Zero Set
Perform zero set whenever necessary, such as after you have turned on the power or when the
ambient temperature changes. Performing zero set adjusts the internal deviation of the optical power
measurement section and enables you to obtain more accurate absolute optical power values. Perform
zero set on the optical power meter.
Optical Power Adjustment
Adjust the optical power of the light source as necessary.
When you execute optical power adjustment, the AQ1200 automatically identifies the optical power
level and adjusts itself accordingly. Perform optical power adjustment on the light source.
• Optical power adjustment begins when you press the Execute soft key. When it ends normally, the
AQ1200 returns to the previous screen. During adjustment, “Execute” changes to “Abort.” All soft
keys other than the Abort soft key are unavailable.
• Press the Abort soft key to stop optical power adjustment. “Abort” will change to “Execute.” The
adjustment value will return to the value that it was at before adjustment was executed.
• Connect a short optical fiber of a few meters or less in length. Make sure that the fiber is free from
dirt, scratches, bends, and other potential causes of optical degradation.
• The initial adjustment value is the factory default setting.
