Preparing for Measurement
3-17
IM AQ6370E-02EN
3
3.5  Alignment Adjustment
 WARNING
The instrument has a built-in reference light source for alignment adjustments (when the built-
in light source specification is -L1), and infrared light is always being output from the optical 
output connector. Never look into the optical output connector. Infrared light entering the eyes 
can cause severe injury and loss of vision.
French
 AVERTISSEMENT
Cet instrument dispose d’une source de lumière de référence (-L1 spécification) intégrée pour 
les ajustements d’alignement. La lumière infrarouge est toujours émise depuis le connecteur 
de sortie optique. Ne regardez jamais directement dans le connecteur de sortie optique. La 
lumière infrarouge risquerait de gravement vous blesser ou de provoquer une perte de vision.
Procedure
1.
  Turn the power to the instrument ON. Turn ON the MAIN POWER switch and press the 
POWER switch. For instructions on turning the power ON and OFF, see section 3.4. 
2.
 Usea9.5/125μmSMopticalfibertoconnecttheinstrument’sopticalinputconnectorwiththe
optical output connector.
 
SM optical fiber
(9.5/125 µm)
AQ6370E
3.
  Press the SYSTEM. The system menu is displayed. 
4.
  Tap the Optical Alignment.
5.
  Tap the Execute. Alignment adjustment is executed automatically by using the alignment light 
source built into the instrument. Adjustment finishes a few minutes thereafter, and you are 
returned to the original screen.