Garmin GMX 200 Installation Manual - page 52
Page 5-18
GMX 200 Installation Manual
Revision D
190-00607-04
5.4.1.4 RS 811A Calibration Procedures Using GMX 200
Refer to the Bendix/King RDS 81 Color Weather Radar System Installation Manual. Follow the
instructions in "Antenna Stabilization Check and Calibration in the Aircraft" or its equivalent.
Skip the description in the RDS 81 manual on how to enter calibration mode and the “hidden page”. The
GMX 200 allows a single button push to enter calibration mode. The GMX 200 MUST be in Install mode
to calibrate the radar head. Follow the instructions below.
1.
Turn the GMX 200 on.
2.
After boot-up is complete, key-in the install sequence 1, 4, 6, on the line select keys to enter the
Install mode.
3.
Press the FN key until one of the smart key options is RADAR. If the RADAR option is not
available, ensure that the GMX 200 is configured for a radar source.
4.
Press the smart key corresponding to the RADAR option. You will now switch to the Radar page.
5.
Press the STBY/ON line select key on the GMX 200 to put the radar unit into standby mode. This
may take up to twenty seconds.
6.
Once the radar is in standby mode, one of the menu options will be TEST. Press the TEST key.
7.
Once the GMX 200 is in Test mode, press the
MENU/ENT
key to switch to the Setup page.
8.
On the Setup page, press the line select key labeled CALB to enter calibration mode. This will take a
few seconds.
9.
The GMX 200 will flash all faults briefly and the text near the bottom of the display will read
“Calibration Enabled” to indicate calibration mode has been entered. If this fails, turn power off and
try again.
10.
From here you may follow the manufacturer’s calibration instructions and procedure or set the
roll/trim parameter. Remember that the antenna is radiating during the setting of roll/trim.
11.
To return to Test mode and the test-pattern display, press the
MENU/ENTER
key. Once you return to
test mode, calibration mode is disabled.