Garmin G1000 Pilot's Manual

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Garmin G1000 Pilot's Manual Manual pdf 27 page image

190-00387-02 Rev. A Garmin G1000 PFD Pilot’s Guide for Cessna Nav III 3-25CNSTRANSPONDER STATUS BARThe Transponder Status bar displays the transpondercode, reply symbol, and mode of operation. TIS (TrafficInformation System) surveillance data up-linked by AirTraffic Control (ATC) radar through the GTX 33 ModeS Transponder appears on the Inset Map (PFD), Navi-gation and Traffic Map Pages on the MFD (refer to theMulti Function Display Pilot’s Guide). If the transponderis configured with Automated Airborne Determination,normal operation begins when lift-off is sensed. Whenthe aircraft is on the ground, the window automaticallydisplays “GND”. The transponder does not respond toATCRBS interrogations when GND is annunciated. If adelay time is set in Configuration Mode, the transponderwaits a specified length of time after landing before chang-ing to GND mode.Transponder OperationPressing the XPDR softkey displays the second-levelsoftkeys:• STBY – Selects standby mode. When in standbymode, the transponder does not reply to anyinterrogations.• ON – Selects Mode A. In this mode, the tran-sponder replies to interrogations, as indicated bythe Reply Symbol (R). Replies do not includealtitude information.• ALT – Selects Mode C. In ALT mode, the tran-sponder replies to identification and altitudeinterrogations, as indicated by the Reply Symbol(R). Replies to altitude interrogations include thestandard pressure altitude received from an externalaltitude source (not adjusted for barometric pres-sure). The ALT mode may be selected in aircraftnot equipped with an optional altitude encoder;however, in this case, the reply signal only repliesto mode A interrogations. The transponder alsoresponds to interrogations from TCAS-equippedaircraft.• VFR – Sets the transponder code to the pre-pro-grammed VFR code selected in ConfigurationMode (this is set to 1200 at the factory in theU.S.A. only; please refer to ICAO standards forVFR codes in other countries).• CODE – Displays the transponder code selectionsoftkeys, which includes the digits 0-7 and BKSP.• IDENT – Pressing the IDENT softkey activatesthe Special Position Identification (SPI) Pulse for18 seconds, identifying the transponder return onthe ATC screen.Transponder Code SelectionTransponder code selection is performed with eightsoftkeys (0-7) providing 4,096 active identification codes.Pushing one of these softkeys begins the code selectionsequence. The new code is activated five seconds afterthe fourth digit is entered. Pressing the BKSP softkeyremoves one digit at a time until the status bar is empty(refer to the Mode S Transponder Pilot’s Guide).Figure 3.5.5 Transponder Status Bar