500 SERIES INSTALLATION MANUAL
Page 5-7
190-00181-02
Rev
Q
SOURCE
Selection Description
PHOTO
Backlight level is determined by the ambient light level as measured
by the photocell on the 500 Series unit.
14V DC
Backlight level tracks a 14 volt DC aircraft lighting bus.
28V DC
Backlight level tracks a 28 volt DC aircraft lighting bus.
5V DC
Backlight level tracks a 5 volt DC aircraft lighting bus.
5V AC
Backlight level tracks a 5 volt AC aircraft lighting bus.
NOTE
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 500
Series unit’s photocell using additional parameters (PHOTO TRANS % and PHOTO
SLP/OFFST) described below.
RESP TIME -
(Response Time)
Sets the speed with which the brightness responds to the input level (bus voltage or ambient light) changes.
The higher the number the slower the display responds. This field has a range of 3 to 7, and is set to 4 at
the factory.
MIN -
(Minimum)
Sets the minimum brightness of the display. The higher the number, the brighter the minimum brightness.
Display minimum brightness has a range of 35 to 999, and is set to 80 at the factory. Key minimum
brightness has a range of 20 to 99, and is set to 40 at the factory. It is prudent to verify that display and key
lighting characteristics match those of other equipment in the panel under night lighting conditions.
Summary of Contents for GNS 530
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