Garmin GNS 480 Installation Manaul

Also see for Apollo CNX80: User Newsletter User Newsletter Supplemental Flight manual Pilot's guide Data list

Contents

Post-Installation Configuration & Checkout3-38 560-0982-01 Rev L GNS 480 (CNX80) Installation Manual3.3.2.4.6 Transponder CheckoutThe GNS 480(s) can remotely control the SL70/SL70R, GTX 33/330 and GTX 32/327 transponders. Thischeck verifies that the units are communicating. Ensure that the GNS 480(s) and transponder are turnedon and in normal mode. If the following steps do not perform correctly, check the electrical connectionsand configuration setup.NOTEIf the aircraft is equipped with a GDL 90 UAT Data Link Sensor, the transponder controlmay also be wired to control the GDL 90. A checkbox must be marked in the GDL 90Control section of the GNS 480 (CNX80) AFMS identifying whether the GNS 480(CNX80) is the control source. Refer to the GDL 90 Installation Manual 560-1049-01 forGDL 90 Post Installation Checkout procedures.Single GNS 480 Installation:1. Verify that the transponder squawk code is displayed in white. Press the XPDR bezel key and verifythat you are able to change the transponder squawk code on the GNS 480 (turning the large, outerknob will allow you to edit the squawk code using the small, inner knob or line select/smart keys). Ifan SL70 / GTX 330 / GTX 327 transponder is connected, you should see the squawk code displayedon the front of the transponder change to the value set on the GNS 480.2. Turn off the transponder or open the transponder circuit breaker and verify that the squawk code onthe GNS 480 changes to yellow.3. Turn on the transponder or close the transponder circuit breaker and verify that the squawk code onthe GNS 480 changes back to white.Dual GNS 480 Installation:1. Turn on GNS 480 #1 and turn off GNS 480 #2.2. Verify that the transponder squawk code is displayed in white on GNS 480 #1. Press the XPDR bezelkey on GNS 480 #1 and verify that you are able to change the transponder squawk code on the GNS480 (turning the large, outer knob will allow you to edit the squawk code using the small, inner knobor line select/smart keys). If an SL70 / GTX 330 / GTX 327 transponder is connected, you should seethe squawk code displayed on the transponder change to the value set on the GNS 480.3. Turn off the transponder or open the transponder circuit breaker and verify that the squawk code onthe GNS 480 changes to yellow.4. Turn on the transponder or close the transponder circuit breaker and verify that the squawk code onthe GNS 480 changes back to white.5. Turn off GNS 480 #1 and turn on GNS 480 #2.6. Verify that the transponder squawk code is displayed in white on GNS 480 #2. Press the XPDR bezelkey on GNS 480 #2 and verify that you are able to change the transponder squawk code on the GNS480. If an SL70 / GTX 330 / GTX 327 transponder is connected, you should see the squawk codedisplayed on the transponder change to the value set on the GNS 480.TIS Traffic Enabled (GTX33+TIS Configured):1. On the GNS 480 go to the traffic page. This page is accessed by pressing the FN key repeatedly untilthe TFC smart key is displayed. The TFC smart key is then pressed to display the traffic page.2. Verify that ‘Data Fail’ or ‘Failed’ is not displayed, and the TIS operating mode (STBY or OPER) isdisplayed in the upper right hand corner.NOTEIf the TIS mode is OPER, ‘TFC N/A’ will be displayed in the center of the screen becauseyou do not have TIS coverage. This is normal operation and does NOT indicate aproblem with the installation.