89000046-014
KSN 780/8XX/900 AeroNav AML STC Installation Manual for Helicopters
Rev 0
Page 7-19
© Honeywell International Inc. Do not copy without express permission of Honeywell.
Field
Selection
Bezel
Value displayed represents the current % brightness of the
bezel backlighting
Display
Value displayed represents the current % brightness of the
display backlighting
Mx Input
Photocell – Maintenance Mode will use this method if selected.
This is the default setting. This setting uses the Photocell on the
AeroNav XXX bezel or display.
dimBus – Maintenance Mode will use this method if selected.
This setting uses the aircraft lighting buss to control the
lightning of the bezel or display.
Table 93 Lighting Bus Configuration
Dimming Bus Calibration
The section will calibrate the AeroNav XXX to the aircraft avionics lighting bus.
Selection
Description
dimBus Type
DC – select this option if the dimming bus is a DC bus.
AC – select this option if the dimming bus is an AC bus.
The AeroNav needs to know the bus type in order to alter
internal configuration as well as properly perform the
calibration.
dimBus Max Voltage
Sets the maximum aircraft dimming bus voltage. Range is 0 –
28V.
dimBus Min Voltage
Sets the minimum aircraft dimming bus voltage. Range is 0 –
28V.
Table 94 Lighting Bus Configuration
To calibrate the dimming bus:
1.
Select desired dimBus Type;
2.
Select the dimBus Max Voltage field;
3.
Push the right bezel knob;
4.
Set the dimming bus to the maximum value (e.g. full clockwise position on dimming rheostat);
5.
Push the right bezel knob to store;
Repeat the process for the minimum value (use full counter-clockwise position of rheostat)
