GTX 335/345 All-In-One ADS-B Transponder Pilot's Guide
© 2016-2018 Garmin Ltd. or its subsidiaries. All rights reserved. This manual reflects the operation of GTX 3X5 transponders. Except as expressly provided herein, no part of this manual may be reproduced, copied, transmitted, disseminated, downloaded or stored in any storage medium, for any purpose without the express written permission of Garmin.
Copyright Information WARNINGS/CAUTIONS/NOTES WARNINGS \ CAUTIONS \ NOTES WARNING Do not use data link weather information for maneuvering in, near, or around areas of hazardous weather. Information contained within data link weather products may not accurately depict current weather conditions. WARNING Do not use the indicated data link weather product age to determine the age of the weather information shown by the data link weather product.
WARNINGS \ CAUTIONS \ NOTES WARNINGS/CAUTIONS/NOTES NOTE The coverage expected for all operations (transponder replies to ATC, ADS-B and FIS-B reception) from the Garmin GTX 3X5 is limited to line of sight. Low altitude or aircraft antenna shielding by the aircraft itself may result in reduced range. Range can be improved by climbing to a higher altitude. NOTE This product does not contain any user-serviceable parts. Repairs should only be made by an authorized Garmin service center.
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ABBREVIATIONS AND ACRONYMS SOURCES AND REFERENCES INTRODUCTION Abbreviations and Acronyms ADS-B Automatic Dependant Surveillance-Broadcast ADS-R Automatic Dependent Surveillance-Rebroadcast AHRS Attitude and Heading Reference System ATC Air Traffic Control ATCRBS Air Traffic Control Radar Beacon System BLE Bluetooth Low Energy FIS-B Flight Information Services-Broadcast PED Portable Electronic Device PIREP Pilot Report SSR Secondary Surveillance RADAR TAS Traffic Advisory System TCAS
Copyright Information 2 3 4 5 6 7 GTX 3X5 Series Transponders ....................................................................................... 1-1 1.1 GTX 335 Transponder ................................................................................................... 1-1 1.2 GTX 345 Transponder ................................................................................................... 1-1 GTX 3X5 Controls ................................................................................
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1 – GTX 3X5XPDR SERIES XPDR GTX 3X5 GTX 3X5 SERIES TRANSPONDERS 1 - GTX 3X5 SERIES XPDR 1 The GTX 3X5 Series Transponders are panel mount and remote transponders. Both models are TSO-C112e (Level 2ens, Class 1) compliant mode S transponders with TSO-C166b compliant ADS-B Out 1090 MHz Extended Squitter functionality. 1.
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1 – GTX 3X5XPDR SERIES XPDR GTX 3X5 2 GTX 3X5 CONTROLS 2.1 Panel Mount Transponder Controls ON Powers on, disables altitude reporting. ALT Powers on, enables altitude reporting. VFR Changes to the preprogrammed squawk code for VFR. OFF Powers off. SBY Powers on or changes into standby mode. IDNT Activates the Ident function. 2.2 Mode Selection Keys NOTE The transponder system no longer supports a pilot selectable GND mode.
2 - GTX 3X5 CONTROLS Table 2-1 Mode Section Key Functions ON ◦ The ON key selects the on mode. ◦ The transponder replies to interrogations.Replies do not include pressure altitude. ◦ The Reply ( ) symbol on the display indicates the transponder is responding. ALT ◦ The ALT key selects the alt mode. ◦ Always use Alt mode while in the air and on the ground, unless otherwise requested by ATC.
1 – GTX 3X5XPDR SERIES XPDR GTX 3X5 2.3 Squawk Code Keys Table 2-2 Squawk Code Key Functions Press the CLR key to move the cursor back to the previous digit. Press and hold the CLR key to move the cursor back to the first digit. Pressing the CLR key when the cursor is on the first digit removes the cursor and cancels the code entry, retaining the last code entered. Pressing the CRSR key when entering the code removes the cursor and cancels the code entry. The last code entered is retained.
2.4 Function Keys 2 - GTX 3X5 CONTROLS Table 2-4 Function Keys FUNC The FUNC key cycles through four menu groups shown on the right-hand side of the display. Menu groups include: ◦ Transponder (XPDR) ◦ Timers (TMR) ◦ Altitude (ALT) ◦ System (SYS) ENT The ENT key acknowledges the selection of menu items and pilot data entry fields. CRSR The CRSR key activates the cursor to select items in menus and on pages. CLR The CLR key clears selected entry and exits the menus.
1 – GTX 3X5XPDR SERIES XPDR GTX 3X5 3 DISPLAY FUNCTIONS AND SETTINGS The GTX 3X5 is organized into four menu groups shown on the right-hand side of the display. Each menu group contains a set of functions and settings. Menu groups include: ◦ Transponder (XPDR) ◦ Timers (TMR) ◦ Altitude (ALT) ◦ System (SYS) 1. To navigate between the menu groups, press the FUNC key.
3.2 Timers (TMR) 3 - DISPLAY FUNCTIONS AND SETTINGS Press FUNC key Press FUNC key Press FUNC key Press FUNC key UP COUNTER – This page provides a stopwatch style counter. Manual start/stop/reset controls are via the ENT and CLR keys. DOWN COUNTER – This page provides notification in a count down style timer when the timer expires. Manual start/stop/set/reset controls are via the ENT and CLR keys.
1 – GTX 3X5XPDR SERIES XPDR GTX 3X5 3.3 Altitude (ALT) Press FU NC key Press FUNC key PRESSURE ALT – This page displays the current pressure altitude. ALT MONITOR – This page displays the current altitude deviation from the altitude chosen to maintain. When the altitude monitor is turned on it is automatically set to the current altitude. Example: If the monitor is turned on at 9,500 ft, the monitor will trip when at 9,250 ft. or 9,750 ft.
3.4 System (SYS) 3 - DISPLAY FUNCTIONS AND SETTINGS Press FU N C key Press FUN C key Press FUN C key Press FU NC key BACKLIGHT – This page displays the current backlight level and backlight level offset. The backlight level offset is via the CRSR and 8 and 9keys. CONTRAST – This page displays the current contrast level and contrast level offset. The contrast level offset is via the CRSR and 8 and 9keys. NOTE Messages are not high priority.
1 – GTX 3X5XPDR SERIES XPDR GTX 3X5 3.4.1 Bluetooth Pairing Instructions For first time activation of Bluetooth devices: 1. Go to the GTX 345 Bluetooth page to enable pairing mode. Refer to figure 3-3. If connected to a GTN or GX000 via HSDB, refer to the display’s pilot’s guide. 2. Enable Bluetooth on the PED. 4. When a PED sends a pairing request the Bluetooth Pair Request page will display the device name and passkey. Refer to figure 3-4. 5.
To unpair a device: 1. Highlight the device to be unpaired. 3 - DISPLAY FUNCTIONS AND SETTINGS 2. Then press the ENT key. Refer to figure 3-7. Figure 3-7 Unpair Device? Page To view the device name on the Bluetooth page: 1. Press the ENT key. 2. Use the 8 and 9keys, highlight the device’s name to view. 3. Then press the ENT key. Refer to figure 3-8. Figure 3-8 (Selected) Bluetooth Device Name Page 3-6 GTX 335/345 Pilot’s Guide 190-01499-00 Rev.
1 – GTX 3X5XPDR SERIES XPDR GTX 3X5 4 ADS-B IN TRAFFIC (GTX 345 ONLY) NOTE Inherent inaccuracies exist in TIS-B and TAS/TCAS traffic position data. Because of this the GTX 345 may at times be unable to correlate targets from multiple sources for the same aircraft. When this occurs, a single aircraft is tracked and displayed as two co-located targets. NOTE The GTX has two modes: 1. Airborne Situational Awareness (AIRB).
4.1 Traffic Alerting To enhance situational awareness, the GTX 345 provides traffic alerting for ADS-B, ADSR, and TIS-B targets. An aural message issues when an alert becomes active. For example, “Traffic! Two O’clock, Low, Two Miles.” 4 - ADS-B IN TRAFFIC Alerting parameters provide enough time after an alert is generated to acquire the target and maneuver the aircraft away from the conflicting traffic. The alerting parameters consider: 1. Closure rate of each aircraft (ownship and target) 2.
1 – GTX 3X5XPDR SERIES XPDR GTX 3X5 4.2.2 No Source of Heading Data Due to helicopter maneuverability, ground track may not correspond to heading at low speeds. Limitations apply to GTX 345 installations with no source of heading data provided. ADS-B traffic will not display when operating at less than 15 knots groundspeed. Aural traffic alerts will issue, appropriately. If a TAS/TCAS is interfaced to the GTX 345 then: 4.
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1 – GTX 3X5XPDR SERIES XPDR GTX 3X5 5 FIS-B WEATHER AND FLIGHT INFORMATION The GTX 345 Flight Information Services–Broadcast (FIS-B) function is capable of receiving weather and flight information. FIS-B is a subscription-free service that is broadcast over the UAT (978 MHz) data link. Reception of FIS-B data requires the aircraft to be within range and line-of-sight of a ground station. Because terrain may obstruct the signal, it may be necessary to gain altitude in order to receive the broadcast.
Table 5-1 FIS-B Weather Products 5 - FIS-B WEATHER AND FLIGHT INFORMATION Weather Product Transmission Interval (Minutes) Update Interval CONUS NEXRAD 15 15 minutes Regional NEXRAD 2.5 5 minutes AIRMETs 5 6 hours or as needed SIGMETs 5 As available. Every hour for convective SIGMETs. METARS 5 15 minutes to 1 hour (METAR station dependent) Winds and Temperatures Aloft 10 6 hours Pilot Weather Report (PIREP) 10 As available. TAFs 10 6 hours. As available for amended TAFs.
1 – GTX 3X5XPDR SERIES XPDR GTX 3X5 6 CONNEXT BLUETOOTH The GTX 345 Connext interface allows communication with applications (i.e., Garmin Pilot and ForeFlight Mobile), while running on a PED. Connext works via the Bluetooth data link to provide up-to-date, wireless information throughout the cockpit. Refer to section 3.4 for Bluetooth pairing instructions. Up to two Bluetooth connections are supported by the GTX 345. Table 6-1 lists the GTX 345 Connext features.
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1 – GTX 3X5XPDR SERIES XPDR GTX 3X5 7 TROUBLESHOOTING The GTX 3X5 display system sends messages to the flight crew when trouble or otherwise abnormal conditions are detected. Table 7-1 outlines troubleshooting actions the flight crew may take to attempt to resolve each system message. If the actions taken do not resolve the message, or if there are any questions, the Garmin Product Support department is available Monday through Friday, 7:00 AM to 7:00 PM Central Time.
7.2 Transponder System Messages NOTE Messages are not high priority. Their purpose is to provide additional information on abnormal system behavior. They do not require immediate pilot action. Any transponder failure will immediately display an alert with no pilot action necessary to view the alert. Depending on configuration, active messages display in the bottom left hand corner of the screen either as a flashing or solid MSG.
1 – GTX 3X5XPDR SERIES XPDR GTX 3X5 SYSTEM MESSAGE ADS-B Position Input Failed EXPLANATION The unit is not receiving GPS. FLIGHT CREW ACTION 1. Check power and/or circuit breaker for the GPS position source (e.g., GTN or GNS). 2. Make sure the GPS antenna has a clear view of the sky and provide enough time for the GPS position source to obtain a position fix.
SYSTEM MESSAGE EXPLANATION Traffic Processing Failed The unit cannot process traffic because the unit isn't receiving enough information or the unit has an internal fault. FLIGHT CREW ACTION 1. Check power and/or circuit breaker for the GPS position source (e.g., GTN or GNS). 2. Make sure the GPS antenna has a clear view of the sky and provide enough time for the GPS position source to obtain a position fix.
© 2018 Garmin Ltd. or its subsidiaries Part Number: 190-01499-00 Rev.
