11-2
IM AQ1200-01EN
11.1 Making Preparations and Adjustments for Loss Testing
Use a short optical fiber to connect an Instrument light source port to an Instrument optical power
measurement port, and then perform optical power adjustment.
1.
Using the
rotary knob
and
ENTER
, select
Auto Loss Test
.
2.
Press the
Function Select
soft key and then the
Light Source
or
Loop Back
soft key.
3.
Using the
rotary knob
and
ENTER
, select the
Wavelength
at which you need to perform loss
testing.
4.
Using the
rotary knob
and
ENTER
, select
LS Power Adjust
to display the following screen.
Starts optical power adjustment
The measurement light turns on.
When adjustment ends normally, the
instrument returns to the previous
screen.
Cancels optical power adjustment
The instrument returns to the previous
screen.
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 Instrument 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
Instrument 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.
