viGarmin GDL 88 ADS-B Transceiver Pilot’s Guide 190-01122-03 Rev. C6 Installation configurations...................................................................6-16.1 Possible Installation Configurations ...................................................... 6-16.1.1 GDL 88 with ADS-B Out Transmission Enabled........................ 6-16.1.2 GDL 88 with ADS-B Out Transmission Disabled ....................... 6-16.1.3 GDL 88 Only – No Display ..................................................... 6-16.2 Interfaces ............................................................................................ 6-26.2.1 Audio Panel........................................................................... 6-26.2.2 Altitude Source...................................................................... 6-26.2.3 Heading Source (optional) ..................................................... 6-26.2.4 GPS Position Source .............................................................. 6-26.2.5 Radar Altimeter (Optional) ..................................................... 6-26.2.6 Traffic Mute (Optional)........................................................... 6-27 Glossary ...............................................................................................7-18 Appendix ..............................................................................................8-18.1 Troubleshooting ................................................................................... 8-18.2 Servicing Your Unit ............................................................................... 8-28.3 Contact Garmin ................................................................................... 8-28.4 Software License Agreement ................................................................ 8-38.5 LIMITED WARRANTY............................................................................ 8-4Index .....................................................................................................Index-1