Table 5-18 Lighting Bus Configuration Procedure - Enhanced (Knob); Figure 5-12 Vertex Adjustment Dialog Box - Garmin GI 275 Installation Manual

Table 5-18 Lighting Bus Configuration Procedure - Enhanced (Knob)

Step
1 Under Source Selection, set Knob Source to Lighting Bus.
Set the Lighting Bus - Input Type to match the aircraft lighting bus voltage, and set the Response Time to
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a value between 0 - 7 seconds.
Touch Enhanced Lighting Mode on. The button should be highlighted green.
3
4 Touch Lighting Curve Configuration → Knob Lighting Day Mode.
Simulate night conditions in the cockpit by using blankets or a similar method, such that the cockpit can
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be made progressively brighter for steps 6 and 8.
Set the Min Level and Vertex 1 while the panel is experiencing night conditions. The level adjustments
can be made by selecting Vertex ( ) and changing the values (refer to Figure 5-12). Seek consistency
between all cockpit lighting.
6
NOTE: A vertex represents a specific output value based on a given input value, where the goal is to
customize the lighting curve by manipulating the vertices.
Set the remainder of the vertices while progressively introducing light to the interior of the aircraft. Set the
Max Level as desired. It is recommended to configure this curve to make sure the display reaches the
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desired max output level (%) prior to 100% input. A linear curve for the photocell typically works well (refer
to Figure 5-12).
8 Verify functionality of dimmer knob. Re-adjust Transition point if/as required.
CAUTION
The display must be viewable under all anticipated lighting conditions, including:
• When the display is in direct sunlight
• When the cockpit is bright but the photocell is in heavy shadow (such as flight into a
setting sun)
• When the cockpit is very dim, the display must not be excessively bright
190-02246-14
Rev. 11
Lighting Bus Day Mode Curve - Knob

Figure 5-12 Vertex Adjustment Dialog Box

GI 275 STC EIS & MFD Installation Manual
Page 5-27