Black Box FOQLS - Auto-Wavelength Recognition; Switching Backlighting of the LCD on and off

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Chapter 5: Operation
Figure 5-8. CW output selections on the LCD.
5.5 Auto-wavelength Recognition
Figure 5-9. Twin key.
Press the Twin key to turn the auto-wavelength recognition feature on and off.
5.6 Switching Backlighting of the LCD On and Off
Figure 5-10. Backlighting key.