Pilot's Guide
The GI 205 performs the following functions:
Receive and process ARINC Label 164
Visual and aural annunciations
Decision Height alert discrete output
Activate Self Test mode in GRA 55/5500
Display Radar Altitude (Meters/Feet)
Auto adjust the brightness of the display
Volume control
Enable/Disable Altitude Trend
Various parameters can be configured by the installer (not pilot accessible):
Altitude Filter Time Constant
Maximum Trend Scale
Trend Filter Time Constant
DH Display Name
DH Visual Alert
DH Aural Alert
Default Decision Height
ARINC 429 Speed
Select Rounding Options
The GI 205 interfaces with Garmin GRA 55 and GRA 5500 radar altimeters via ARINC
429 interface.
Inhibit DH Input: If this discrete input is connected to ground, the decision height
functionality is masked from the display.
GRA Altitude Alert Discrete Input 1: If this discrete input is connected to the GRA 55 or
GRA 5500, the GI 205 provides a visual and aural annunciation when the input is active.
GRA Altitude Alert Discrete Input 2: If this discrete input is connected to the GRA 55 or
GRA 5500, the GI 205 provides a visual and aural annunciation when the input is active.
Aircraft power is the only electrical power interface.
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