Figure 5-10. Main Lighting Page; Figure 5-11. Date/Time Setup Page - Garmin GPS 400W, GNC 420W Installation Manual

SLOPE
Sets the sensitivity of the display brightness in proportion to changes in the input level. The higher the
number, the brighter the display is for a given increase in the input level. This field has a range of 0
(zero) to 99, and is set to 50 at the factory.
OFFSET
Adjusts the lighting level up or down for any given input level. This field has a range of 0 (zero) to 99,
and is set to 50 at the factory. This may also be used to match lighting curves with other equipment in
the panel.
If a lighting bus (any selection other than PHOTO) is selected, and the lighting bus
control is turned to its minimum (daytime) setting, the display brightness tracks the
400W Series unit's photocell using additional parameters (PHOTO TRANS % and
PHOTO SLP/OFFST) described below.
PHOTO TRANS % - (Photocell Transition Percentage) When a lighting bus is used to control the
lighting of the display (see Figure 5-10), this parameter sets the point on the lighting bus control below
which the display brightness tracks the 400W Series unit's photocell. This field has a range of 0 (zero) to
99, and is set to 25 at the factory.
PHOTO SLP/OFFST - (Photocell Slope/Offset)
These fields are equivalent to the SLOPE/OFFSET fields described above, with the exception that they
only control the display lighting characteristics when the lighting bus control is below the level specified
in the PHOTO TRANS % field. Both fields have a range of 0 (zero) to 99, and are set to 50 at the
factory.
5.3.8 GPS DATE/TIME SETUP Page
This page displays the GPS date and time. (see Figure
5-11).
400W Series Installation Manual
190-00356-02

Figure 5-10. MAIN LIGHTING Page

(Display Lighting from Lighting Bus)
NOTE

Figure 5-11. DATE/TIME SETUP Page

Page 5-11
Rev. E