Garmin MX20 Installation Manual - page 50

   Installation 

MX20 Installation Manual 

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2.9.11 Garmin GTX330 Checkout Procedure 

First, perform the Post-Installation Checkout Procedure in Section 3.3 of the GTX330D Transponder 

Installation Manual. Once completed successfully, turn on the MX20. After the MX20 self-tests are 

completed, enter the Traffic (TRAF) function by pressing the FN key until the TRAF menu option is 

available. Then, press the corresponding TRAF “smart” key, followed by the Menu/Enter key. Press the 

“Operate” Line Selection key. Verify that “TIS Standby” is displayed in the lower right corner. Press the 

“Standby” Line Selection key. Verify that “TIS Operating” or “TIS Unavailable” are displayed in the lower 

right corner of the display.  

2.9.12 Garmin AT GDL 69/69A Checkout Procedure 

2.9.12.1  FIS Data Link Checkout Procedure (GDL 69/69A) 

The checkout procedure involves verifying that the satellite signal is acquired and tracked.  Locate the 

aircraft where there is a clear view of the southeastern or southwestern sky.  XM Satellite Radio satellites are 

located above the equator over the eastern and western coasts of the continental United States.  Turn on the 

power to the MX20 and the GDL 69/69A receiver.  After the MX20 performs its self-tests, enter the FIS 

function by pressing the FN key until the FIS function is available.  Press the FIS corresponding smart key.  

Press the fourth smart key until the status page is displayed.  Perform the Post-Installation Checkout 

Procedure as described in the GDL 69/69A Installation Manual (Part Number 190-00355-02). 

2.9.12.2  XM Satellite Radio Audio Checkout Procedure (GDL 69A only) 

The checkout procedure involves verifying that the satellite signal is acquired and tracked and that audio can 

be heard through the audio panel.  Locate the aircraft where there is a clear view of the southeastern or 

southwestern sky.  Turn on the power to the MX20, GDL 69A, and audio panel.  After the MX20 performs 

its self-tests, press the FN key until the XM function appears.  Press the corresponding smart key.  If the XM 

Satellite Radio audio subscription has not been activated, audio is available only on Channel 1.  If the audio 

subscription has been activated, audio should be available on multiple channels.  Refer to the MX20 Pilot’s 

Guide and the audio panel operator’s manual for instruction on changing channels and adjusting the volume.  

Receiving channel information on the MX20 and changing channels verifies the communication link between 

the MX20 and GDL 69A.  Changing volume verifies proper audio connections between the GDL 69A and 

the audio panel. 

2.9.13 WSI InFlight Checkout Procedure 

The checkout procedure involves verifying that the satellite signal is acquired and tracked. Turn on the power 

to the MX20 and WSI InFlight AV-200 receiver. After the MX20 performs its self-tests, enter the FIS 

function by pressing the FN key until the FIS function option is available. Press the corresponding FIS 

“smart key” followed by the Menu/Enter key, and finally the “Status” Line Selection key. The top three lines 

indicate signal reception quality. Perform the Post-Installation Checkout Procedure as described in Section 4 

of the WSI InFlight AV-200 Installation Manual.  

2.9.14 Honeywell KMH 820 IHAS Checkout Procedure 

Checkout of the TAWS function should be done according to the procedures in Section 2.9.10, which are 

those for the KGP 560.   

Checkout for the TAS function should be done according to the procedures in Section 2.9.7, which are those 

for the SkyWatch sensors.