Garmin GMX 200 Installation Manual - page 45

GMX 200 Installation Manual 

Page 5-11 

190-00607-04 Revision 

D 

2.

Press the 

Next Page

 line select key to view additional set up options. 

a.

GDL 90 UAT Radio 

(only required if UAT/ADS-B system is installed): 

Selections: Disabled, Disp/Cntl, Disp Only 

Select Disp/Cntl if the GMX 200 is to be used to control the GDL 90 and display UAT traffic.  

Select Disp Only if the GMX 200 only displays UAT traffic (control of the GDL 90 is 

provided by an external controller).  If a GDL 90 is not connected to the GMX 200, select 

Disabled. 

b.

GDL 90 Code Edit 

(only required if UAT/ADS-B system is installed): 

Selections: Disabled, Enabled

If the GDL 90 UAT is installed and you want to allow entering/editing the GDL 90 

transponder squawk code, select Enabled.  If the aircraft has an operating transponder, the 

GDL 90 Code Edit option must be set to Disabled.  

It is recommended that this always be 

set to Disabled. 

c.

GDL 69 Cable Loss 

(only required if GDL 69/69A system is installed): 

Selections: 0 to 50 dB in 0.1 dB increments 

Press the line select key for this option to allow editing of the cable loss value.  Use the smart 

keys to change the cable loss value, and press the 

MENU/ENTER

 key when done.  Refer to 

the GDL 69/69A Installation Manual (Garmin P/N 190-00355-02) to determine the correct 

cable loss. 

d.

GDL 69 Antenna Gain 

(only required if GDL 69/69A system is installed): 

Selections: 24 to 40 dB in 1 dB increments   

Press the line select key for this option to allow editing of the antenna gain value.  Use the 

smart keys to change the antenna gain value, and press the 

MENU/ENTER

 key when done.  

Refer to the GDL 69/69A Installation Manual (Garmin P/N 190-00355-02) to determine the 

correct antenna gain. 

3.

Press the 

Main Menu

 line select key to return to the first menu page.