Panasonic SF4D-A18 Instruction Manual page 78

Adjustment
Step 6 Check the stable light reception indicator and digital indicator on the emitter and receiver.
If the stable light reception indicator lights orange the device is in the unstable light re-
ception state.
Step 7 If the stable light reception indicator lights green the device is in the stable light recep-
tion state.
Stable light reception state:
Light intensity / Level 1
Stable light reception
indicator
Digital indicator
Stable light reception state:
Light intensity / Level 3
78
Unstable light reception: Light intensity / Level 1
Stable light reception indicator
Digital indicator
Stable light reception state:
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Light intensity / Level 2