190-01004-02 GTN 625/635/650 TSO Installation ManualRev. F Page 6-696.12.15 TIS (Garmin GTX 33/330) Interface TestIf a Garmin GTX 33/330 sensor has been connected to the GTN, the traffic interface should be verified asdescribed in this section.1. Select the Traffic Map on the GTN.2. Verify that TIS FAIL is not displayed in the upper left corner under Traffic Status, and that NODATA (yellow) is not displayed over the ownship symbol.3. On the upper left corner of the Traffic Map page, verify that the status of the traffic system is eitherTIS Standby or TIS Operating/Unavailable (i.e. TAS should not be displayed).The following additional steps should only be completed if the GTN is controlling the traffic system.1. Pull the transponder circuit breaker and verify the air data fields are red ‘X’d.2. If a squat switch (or airspeed switch) is connected to the GTX 33/330, ensure that it is in AIRmode.3. Alternately touch the ‘Standby’ key and ‘Operate’ key to change the mode of the traffic system. Itmay take several seconds for the traffic system to change modes.4. Verify that the mode of the traffic system can be changed.6.12.16 Transponder Interface CheckIf the GTN is interfaced to a GTX 32/33 remote transponder or a GTX 327/328/330 configured as a remotetransponder, the following checks must be completed.1. With the GTN unit running in normal mode and the transponder powered on, go to the Home pageand ensure there is no red ‘X’ over the transponder data field on the top right of the screen.2. Ensure that a code can be entered into the code field. Enter a code using the keypad and then touch‘Enter’. Ensure the code that was entered is displayed in the transponder data field.3. If dual transponders are installed, select transponder 2 and perform steps 1 and 2 for the secondtransponder as well. Also pull the transponder 1 circuit breaker and ensure the transponder 1 datafield is red ‘X’d rather than the transponder 2 data field to verify that the wiring is not crossed. (i.e.transponder 1 is incorrectly connected to transponder 2 circuit breaker.)4. Repeat the preceding steps for the second GTN.
