Garmin GDL 90 Installation Manual

Also see for GDL 90: Installation manual

Post-Installation Configuration & CheckoutGDL 90 Installation Manual 560-1049-00 Rev B 4-7P1 Descriptionon / off ON – display the number of good message received in last secondOFF – turn off the display of the number of good messages4.2.1.10 Service CommandThe Service command causes service information to be returned. It is useful for troubleshooting systemfailure or malfunction.>service4.2.1.11 Version CommandThe Version command displays version numbers of the Application software, Main I/O Board FPGA, RxLogic FPGA, PLD, Micro APM software, Radio-controller software and GPS Engine software.>version4.2.2 MX20 SETUPIf the GDL 90 is used in conjunction with a Garmin MX20 Multi-function Display, the MX20 should beconfigured accordingly. For instructions, refer to the MX20 User Guide (Part No. 560-1026-06 or laterFAA-approved revision), which is included in the GDL 90 Product CD.4.3 EQUIPMENT OPERATIONAL/FUNCTIONAL TEST4.3.1 SYSTEM CHECKOUT – GROUND CHECKSThe GDL 90 executes a self test at power-up to verify the unit operation as well as other internalfunctions. Failures and system status are recorded and communicated via 6 LEDs in the front of the unit.Verify that the unit does not display a failure indication when turned on.The GDL 90 must be properly configured prior to performing system checkouts. When configuredcorrectly, the GDL 90 will annunciate failures that are detected with interfacing systems when it is firstturned on. Any annunciated failures should be corrected prior to proceeding with the ground checks4.3.1.1 GPS Navigation CheckoutFollowing configuration of the APM, the aircraft should be moved to a location with an unobstructedview of the available GPS satellites. A computer must be connected to the maintenance port to verifyposition and signal strength information.Check the GPS operation as follows:1. Connect a computer to the 9-pin maintenance port connector (Refer to Section 4.2.)2. Turn on the GDL90 and allow the unit to acquire a position. Verify that the GPS LED on the frontof the GDL 90 stops blinking and remains steadily lit within 20 minutes of power-on, indicatingunit has acquired a 3-D fix. All other avionics should be turned off for this part of the test.