Figure 6-14. Enhanced Lighting Configuration - Day Mode Operation - Garmin GTN 625 Installation Manual

6.6.7.2 Day Mode Operation Page
The day mode operation configuration page, shown in Figure 6-14, is reached by touching the 'Day Mode
Operation' key on the Enhanced Lighting Configuration page, shown in Figure 6-12.

Figure 6-14. Enhanced Lighting Configuration - Day Mode Operation

Day Mode Operation page allows configuration of the photocell transition, key backlight cutoff, and curve
parameters listed below.
PHOTOCELL TRANSITION
When a lighting bus is used to control the lighting of the display, this parameter sets the point on the
lighting bus control below which the display brightness tracks the GTN's photocell. This field has a range
of 5 to 50, and is set to 25 as the default setting. The transition point is depicted as a purple vertical line on
the display curve configuration page
KEY BACKLIGHT CUTOFF
This parameter configures the point at which key backlighting is switched off in bright light. For example,
a value of 70% results in the key backlights being turned off at photocell source input levels above 70%.
This field has a range of 0 (zero) to 100% and is set to 80% as the default setting. The key backlight cutoff
is depicted as a purple vertical line on the keys curve configuration page.
MINIMUM LEVEL
This sets the minimum brightness of the keys or display. Touch the 'Minimum Level' key corresponding
to either the Keys or the Display to adjust the minimum brightness. The minimum brightness level can be
adjusted in a range from 0.05% to 100.00% when tracking the lighting bus, and from 0.14% to 100.00%
when tracking the photocell, with 100.00% being the maximum brightness level. The default minimum
display brightness level when tracking the lighting bus is 0.05%. The default minimum display brightness
level when tracking the photocell is 0.14%. The default minimum bezel key brightness level is 0.00%.
MAXIMUM LEVEL
This sets the maximum brightness level for the lighting curve. Values may be between the range 20 and
100.
190-01004-02 GTN 625/635/650 TSO Installation Manual
Rev. F Page 6-17