Garmin MX20 Installation Manual - page 48
Installation
MX20 Installation Manual
41
2.9.9.3.2 Test Pattern
Press the ON/STBY line item and allow approximately twenty seconds for the radar to power up. Verify at
this point that the RADAR powers up and performs the antenna clearance test. Once the unit is powered-up,
the radar will be in standby mode.
Press the TEST line item to place the unit in Test mode.
Verify that the test pattern is displayed. Press the range UP/DOWN keys if necessary until the test pattern
can be seen.
2.9.9.3.3 Tilt Test
Press the TILT line item and verify that the tilt can be adjusted from +15 degrees up, to –15 degrees down:
Pressing and holding the key will auto increment the value. Verify that both the RADAR antenna
mechanically follows the commands and that the display tilt indicator value on the MX20 I/O screen
corresponds to the actual angle of the antenna.
2.9.9.3.4 Vertical Test - ART 2000 ONLY
Press the VERT line item and verify that the antenna scan changes from the horizontal profile to the vertical profile.
2.9.9.3.5 Radar On Mode Checkout
WARNING
When in ON mode, the radar antenna will be radiating.
If the MX20 radar function is not in standby mode, place it in standby mode by pressing the STBY line item.
Once in standby, press the ON line item (same key as STBY). The unit is now in “WX” mode. Verify that
the mode can be changed to MAP mode by pressing the MAP line item. Now verify that the unit can be
placed in vertical profile by pressing the HORZ/VERT line item (ART 2000 ONLY). The display should
change to a vertical profile scan.
1. Press the Brg "smart keys" and verify that the bearing can be changed from 45 L to 45 R. ART 2000
ONLY.
2. Press the TILT/BRG line item to select the TILT on mode. ART 2000 ONLY
3. Press the Tilt "smart keys" and verify that the tilt angle can be changed from 15 DN to 15 UP.
The Radar Function should still be in MAP mode. If not in MAP mode, press the MAP line item. In map
mode the bottom line item will have a second option: GAIN. Press the GAIN line item. A bar-gauge should
appear in the bottom left of the display. Verify that the gain can be adjusted from minimum to maximum by
pressing the Gain "smart keys." At minimum, the green bar in the gauge will not be present. At maximum,
the green bar fills the entire gauge.
2.9.9.4 Final Radar Checkout
Ensure all ground checkout procedures are completed and verified prior to "open air" checkout.
With stabilization on, during takeoff or prolonged aircraft maneuvers, the displayed radar returns may not be
accurate. Point the aircraft radar sensor across the airport and paint buildings and terrain.
2.9.10 Landmark TAWS8000 and KGP560 Checkout Procedure
2.9.10.1 KGP560 Configuration
The MX20 with I/O option and version 5.0 (or later) software is required in order to display terrain from the
KGP-560 EGPWS. External terrain caution and warning annunciator lamps are also required. The figure
below shows the connections between the MX20 display and the KGP560 EGPWS.