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Garmin. Garmin hereby grants permission to download a single copy of this manual and of any revision to this manual onto a hard drive or other electronic storage medium to be viewed and to print one copy of this manual or of any revision...
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Revision Record Revision Record REVISION REVISION DATE CHANGE DESCRIPTION 06/27/24 Initial Release. 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page ii...
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HANDLING THE UNIT ITSELF. CAUTION THE GTR 205x HAS A DISPLAY IS COATED WITH A SPECIAL ANTI-REFLECTIVE COATING THAT IS SENSITIVE TO WAXES AND ABRASIVE CLEANERS. CLEANERS CONTAINING AMMONIA WILL HARM THE ANTI-REFLECTIVE COATING. IT IS IMPORTANT TO CLEAN THE DISPLAY USING A CLEAN, LINT-FREE CLOTH AND AN EYEGLASS LENS CLEANER THAT IS SPECIFIED AS SAFE FOR ANTI-REFLECTIVE COATINGS.
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IN A MONITORING STATE, CAN DISRUPT GPS/SBAS PERFORMANCE. NOTE Garmin recommends installation of the GTR 205x/GTR 205xR by a Garmin authorized installer. To the extent allowable by law, Garmin will not be liable for damages resulting from improper or negligent installation.
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Garmin Navigation System Global Positioning System Glideslope Garmin Touchscreen Navigator Garmin Transceiver Radio HSDB High Speed Data Bus Instructions for Continued Airworthiness ICAO International Civil Aviation Organization Intercom System Instrument Landing System 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page v...
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Line Replaceable Unit NVIS Night Vision Imaging System Part Number SBAS Satellite-Based Augmentation System Secure Digital (Card) Source Destination Identification Threaded Neill-Concelman Technical Standard Order VSWR Voltage Standing Wave Ratio 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page vi...
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List of Tables Table 1-1 Models Available ..........................1-2 Table 1-2 Physical Specifications .........................1-3 Table 1-3 Display Specifications (GTR 205x) ......................1-3 Table 1-4 COM Transmitter Specifications ......................1-4 Table 1-5 COM Receiver Specifications .......................1-5 Table 1-6 Current Draw Specifications ........................1-5 Table 1-7 FCC Grant of Equipment Authorization ....................1-6...
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Table 8-25 GTR COM Message Format .......................8-20 Table 8-26 Unit Display Information Message Format ..................8-20 Table 8-27 GTR COM Error Message Format ......................8-21 Table 8-28 Input Message Summary ........................8-21 Table 8-29 Output Message Summary .......................8-22 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page xi...
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This manual is intended to provide mechanical and electrical information for use in the planning and design of an installation of the GTR 205x/GTR 205xR into an aircraft. It is not a substitute for an approved airframe-specific maintenance manual, installation design drawing, or complete installation data package. Attempting to install equipment by reference to this manual alone and without first planning or designing an installation specific to your aircraft is not recommended.
Equipment Description The GTR 205x is a 1.35" panel mounted COM product, while the GTR 205xR is a 1.35" remote mounted COM product. The GTR 205x features a high-resolution LCD display, dual encoder knob, and a microSD card slot. The GTR 205xR is a remote-mounted unit.
10.32" (262.1 mm) of aircraft panel to rear of connector backshells) GTR 205x weight (unit only) 2.2 lbs. (1.0 kg) GTR 205x installed with rack and connectors 2.8 lbs. (1.4 kg) GTR 205xR weight (unit only) 2.0 lbs. (0.9 kg) GTR 205xR installed with rack and connectors 2.6 lbs.
At least 35 dB (SNR) Stuck mic time-out 30 seconds time-out, reverts to receive Less than 5% distortion when the transmitter is at 90% modulation at Demodulated audio distortion 350 to 2500 Hz. 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 1-4...
0.63 A 3.35 A 0.33 A 1.61 A [1] The specified current draw is with the display backlight set to 100%. [2] There is no support for 16 W functionality. 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 1-5...
The GTR has a database of frequencies for airports. Users update the frequency database by purchasing database subscription updates from Garmin or Jeppesen. The frequency database is stored internally and uses a micro-SD card to transfer the database into the unit. Refer to the applicable GTR pilot's guide or go to flyGarmin.com...
The unit must not be installed in areas where water or fluid contamination could be commonly encountered. Aircraft Radio An aircraft radio station license is not required when operating in U.S. airspace, but may be required when operating internationally. 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 2-1...
For installations that may provide direct exposure, the limits specified by FCC regulations 47 CFR 1.1310 should be referenced by the installer. 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 3-1...
If aircraft has a throw-over yoke, be sure the yoke does not interfere with the unit. For remote mounting considerations, refer to Remote Mount section. 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 3-2...
After reconfiguring the avionics in the cockpit panel, if the unit is mounted less than 12" from the compass, recalibrate the compass and make the necessary changes for noting correction data. 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 3-3...
GPS 1.57542 GHz notch filter 330-00067-00 Connector, TNC, male, clamp 031-4452 [1] [1] This part is not available from Garmin. Vendor Contact Information (provided for convenience only): Amphenol RF, Four Old Newtown Road, Danbury, CT 06810 Phone: (800) 627-7100 Reference Documents...
Table 4-10 Socket Contact P/Ns Wire Gauge 22-28 AWG Garmin P/N 336-00021-00 Military P/N M39029/58-360 [1] [1] Non-Garmin part numbers shown are not maintained by Garmin and are subject to change without notice. 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 4-5...
2. Insert a 3/32" hex drive tool into the access hole at the bottom of the unit face. 3. Turn the hex tool clockwise while pressing on the left side of the bezel until the unit is seated in the rack. 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 4-6...
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Attach the connectors to the connector backplate the same way as panel mount units. Refer to Panel Mount section. Unit Replacement Whenever the unit is reinstalled, verify the unit powers up successfully. 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 4-7...
6" in-line BNC connection. This would be an acceptable place to insert the VSWR meter. Any problem with the antenna installation is most likely seen as high reflected power. A VSWR of 3:1 may result in up to a 50% loss in transmit power. 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 4-8...
Route the wire harness, avoiding sharp bends and providing adequate space. The connector kit includes the backshell assembly. Table 4-11 lists part numbers for the D-sub connectors and the backshell assembly. 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 4-9...
[3] Not supplied - must be purchased separately. [4] Solder sleeve with pre-installed shield drain wire may be used instead of items 9 and 10. [5] Not a Garmin part number. CAUTION THE SCREWS (13) USED TO GROUND THE SHIELDS TO THE SHIELD BLOCK SHOULD PENETRATE TWO TO FOUR THREADS PAST THE SHIELD BLOCK.
NO LONGER THAN 3" PREFERRED METHOD 2.5" MAX .31" MAX. OF EXPOSED SHIELD 0.17" SHIELD DRAINS AS SHORT AS PRACTICAL NO LONGER THAN 3" ALTERNATE METHOD Figure 4-1 Shielded Cable Preparation 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 4-11...
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11. Insert the pin into the connector (7) in accordance with wiring diagrams in section 10. 12. Verify that the pin is properly engaged into the connector by gently tugging on the wire. 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 4-12...
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7. Insert the screw (13) into the tapped holes on the backshell. 8. Insert the assembled connector into the backplate. 9. Secure the connector (7) into the backplate with screws (2). 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 4-14...
HEADSET 2 AUDIO OUT RIGHT HEADSET 1 AUDIO OUT RIGHT AUX 3 AUDIO IN HI AUX 2 AUDIO IN HI AUX 1 AUDIO IN HI DISC 5* SPEAKER AUDIO OUT HI 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 5-2...
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MIC 2 AUDIO IN LO MIC 1 AUDIO IN LO AIRCRAFT GND AIRCRAFT POWER CONFIG MODULE POWER CAN BUS LO CAN BUS HI RS-232 IN CAN BUS TERM B CAN BUS TERM A 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 5-3...
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AIRCRAFT POWER An asterisk (*) following a signal name denotes that the signal is an Active-Low, requiring a ground to activate. If there is no asterisk, the signal is an Active-High. 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 5-4...
HEADSET 1 AUDIO OUT RIGHT AUX 3 AUDIO IN HI AUX 2 AUDIO IN HI AUX 1 AUDIO IN HI UNIT ID IN SPEAKER AUDIO OUT HI COM AUDIO OUT HI RESERVED 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 5-5...
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MIC 1 AUDIO IN LO AICRAFT GROUND AIRCRAFT POWER RESERVED CAN BUS LO CAN BUS HI RS-232 IN CAN BUS TERM B CAN BUS TERM A RESERVED HEADSET 2 AUDIO OUT LEFT 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 5-6...
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AUX 4 AUDIO IN HI TX INTERLOCK OUT EXTERNAL COM KEY OUT DISC 4* DISC 3* DISC 2* DISC 1* COM MIC 2 KEY* COM MIC 1 KEY * AIRCRAFT GROUND AIRCRAFT POWER 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 5-7...
Table 5-4 Lighting Pins Pin Name LIGHTING BUS HI LIGHTING BUS LO 5.2.3 Antennas Antennas use BNC coaxial connectors on the connector backplate. Table 5-5 Antenna Pins Pin Name COM ANTENNA 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 5-8...
Activation of COM MIC 2 TRANSMIT enables MIC 2 AUDIO IN HI and causes the transceiver to transmit. 500 Ω COM AUDIO is a 65 mW audio output that is intended to drive a headset or an audio panel. 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 5-9...
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COM AUDIO is the summation of the COM receiver audio, COM sidetone audio, and intercom audio. Table 5-8 COM Audio Pins Pin Name COM AUDIO OUT HI COM AUDIO OUT LO 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 5-10...
COM STANDBY MONITOR* The COM STANDBY MONITOR* discrete input is used to monitor standby COM frequency audio. A momentary low on this pin will toggle the COM standby monitor ON and OFF. 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 5-11...
An asterisk (*) following a signal name denotes that the signal is an Active-Low, requiring a ground to activate. 5.2.8 Configuration Module Table 5-11 Configuration Module Pin Name CONFIG MODULE CLOCK CONFIG MODULE DATA CONFIG MODULE GROUND CONFIG MODULE POWER 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 5-12...
CAN BUS HI CAN BUS LO CAN_TERM_A NOTE: JUMPER (BETWEEN PINS 47 & 48) REQUIRED WHEN GTR 205x/GTR 205xR IS LOCATED AT END OF CAN BUS CAN _TERM_B Figure 5-1 CAN Bus Pins Table 5-13 CAN Bus Pins Pin Name...
System Configuration System at a Glance This section provides complete instructions for configuring GTR 205x functionality. Screenshots are for reference only. SYS Setup Unit Setup Interfaces SD Save Test Diagnostics SYS INFO Audio Digital Unit ID RS-232 SW Upload Database...
DIMMING BUS AT THE LOWEST SETTING, AND SLOWLY INCREASE THE BRIGHTNESS. VERIFY THE WIRING IS CORRECT IF IT IS NOTICED THE LIGHTING LEVEL ON THE GTR 205x/GTR 205xR DOES NOT INCREASE AS THE LIGHTING BUS INPUT IS INCREASED IN BRIGHTNESS.
2. Press and hold the right inner knob. 3. Apply power to the unit by turning the COM volume knob. 4. When “Garmin” appears on the screen release knob. The first page displayed is the Configuration Mode Home page. • SYS Setup •...
Figure 6-5 Tail Number Page Enablement An enablement card is necessary to activate Night Vision and 16W COM Transmit features. A green bar displays when the feature is active. Figure 6-6 Enablement Page 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 6-6...
Unit ID sets the unit as GTR 1 or GTR 2. Table 6-1 Unit ID Selections Selection Setting Description GTR 1 (Default) COM #1 Unit ID GTR 2 COM #2 Figure 6-7 Unit ID Page 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 6-7...
Speaker Volume 0% to 100% Adjusts the volume output of the speaker. Enable Bluetooth is enabled if a green bar displays. Bluetooth Disable Bluetooth is disabled. Figure 6-9 ICS/Audio Page 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 6-9...
0% to 100% AUX 4 Unswitched 0% to 100% Stereo Left AUX Squelch 0% to 100% [1] Customize to desired four character label. Figure 6-10 AUX Audio Input Configuration Page 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 6-10...
Transition (Default is 25) to control the unit display backlight. The photocell transition is a percentage of the maximum lighting bus input level. Figure 6-13 Photocell Configuration Page 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 6-12...
Reset to Default Selections Selection Description Reset Resets all lighting settings to default values. Cancel Exits the prompt and keeps the current lighting settings. Figure 6-15 Reset to Defaults Page 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 6-13...
(Default is 4) transmitted via COM radio. Resets squelch, sidetone volume, and TX MIC gain settings to default values. Reset to Defaults Exits the prompt and keeps the current settings. 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 6-14...
RX Squelch Open COM RX Squelch Approximation Setting (%) [1] (dBm) -89.5 43 (Default) 82.5 [1] The COM Carrier range (0-100) is a linear response. Figure 6-17 COM Levels Page 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 6-15...
GTR with this selection. Serial data “RS-232 NMEA” input/output as defined in NMEA 1 section 8.2 (for example, with G500/G600, GPSMap, Aera Series, XL Series, or G3X Touch). Figure 6-18 RS-232 Page 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 6-16...
System Configuration HSDB HSDB (Ethernet) Settings NOTE Refer to the LRU installation manual for compatibility information. Visit Garmin’s Dealer Resource Center and search by product name. Table 6-14 HSDB (Ethernet) Setting Selections Selection Setting Description Present Configure if a GPS navigator such as GPS 175 or GTN Xi GPS Navigator is present on the HSDB (Ethernet) network.
System Configuration Discrete In NOTE Discrete 5 is available only on the GTR 205x. Table 6-15 Discrete In Selections Selection Description Discrete Off No discrete selected. Used to flip-flop between active and standby COM frequencies. It COM Remote Transfer may also be used tune the emergency COM frequency 121.500MHz.
Saving to an SD card allows information to display on a PC, emailed, or printed. The saved information includes: • Printable summary of all configuration settings (HTML) • Printable maintenance log • Error log Figure 6-22 SD Save Pages 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 6-19...
Displays total power ups and operating hours. Displays temperature of main board, LED board, and COM Temps transmitter. Allows the clearing of the maintenance log, configuration settings, Clear/Delete and deleting the database. Figure 6-24 Diagnostics Page 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 6-20...
Figure 6-26 HSDB (Ethernet) Diagnostic Page View CAN Bus Status Diagnostics > Digital > View CAN Bus Status displays the status of the network bus. Figure 6-27 CAN Bus Diagnostic Page 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 6-21...
Diagnostics > Discrete > View Discrete Outputs displays the status of discrete outputs. Figure 6-29 Discrete Out Page Analog In Diagnostics > Analog In displays the bus setting and input voltage. Figure 6-30 Analog In Pages 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 6-22...
Diagnostics > Power Stats displays the number of Total Power-ups and Operating Hours. Figure 6-31 Power Stats Page Temps Diagnostics > Temps displays the temperatures of Main Board, LED board, and COM Transmitter. Figure 6-32 Temps Page 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 6-23...
If Yes is selected, a unit restart is necessary. Figure 6-37 Configuration Options Reset Selecting Delete Database prompts a warning. Select Yes or No to proceed. Figure 6-38 Warning of Deleting Databases 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 6-25...
6.5.1 Lighting Bus Interface Check CAUTION WHEN 14 VDC OR 28 VDC LIGHTING BUSES ARE CONNECTED TO THE GTR 205x, CONNECTION OF THE AIRCRAFT LIGHTING BUS TO THE INCORRECT INPUT PINS CAN CAUSE DAMAGE TO THE GTR 205x. ALWAYS START THIS TEST WITH THE DIMMING BUS AT THE LOWEST SETTING, AND SLOWLY INCREASE THE BRIGHTNESS.
Activates and deactivates the standby COM monitor. TX INTERLOCK Desensitizes the receiver of the COM radio. PILOT ICS KEY Activates the pilot’s microphone for the ICS. COPILOT ICS KEY Activates the copilot’s microphone for the ICS. 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 6-27...
3. Verify the connected GPS source has a valid GPS satellite fix. 4. Press FIND. 5. Turn the outer knob to NEAREST APT. 6. Verify the wiring between the GPS source and the GTR if the unit displays “No GPS Position.” 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 6-28...
It may be required by the governing regulatory agency to verify operation of the COM transmitter and receiver at the extents of a ground facility’s service volume (e.g., FAA AC 23-8A). 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 6-29...
System Configuration Software Loading The unit comes pre-loaded with software. It is recommended software from a current GTR Downloadable Software microSD Card, P/N 006-B4769-XX, be loaded into the unit. Visit Garmin’s website and search by product name. For dual installations the software loading procedures below must be carried out on each unit. Refer to section 6.4 for instructions pertaining to entering configuration mode.
3. Push and hold MON. 4. Push and release to top soft key. Soft Key When the screenshot is successful, a camera icon briefly displays in the annunciator bar. Figure 6-40 Screenshots 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 6-31...
Other than for regulatory checks, maintenance of the GTR 205x/GTR 205xR is “on condition” only. Periodic maintenance of the GTR 205x/GTR 205xR is not required. Instructions for Continued Airworthiness are not required for this product under 14 CFR Part 21 since the GTR 205x/GTR 205xR has received no FAA approval or endorsement. 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev.
Table 8-3 describes the Type 1 output sentence item designator (id) and item data (dddd) fields. If data for these sentences is invalid or unavailable, dashes ("-") are used to fill in all non-blank character positions. 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 8-2...
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- N (NAV flagged) or - (NAV valid) Warnings status, only data transmitted are dashes (-). Used to indicate end of Type 1 sentences. l (lower case Distance to destination waypoint in tenths of Lima) nautical miles. 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 8-3...
(3 ASCII characters; route sequence number is “01”) sequence number (1 binary byte; last waypoint flag is set; route sequence number is 1) ASCII carriage return character (0D hex) ASCII line feed character (0A hex) 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 8-4...
[1] Encoded hex: each character consists of 4 bits of data placed in the low order nibble +30h. For example, the 8-bit value 5Fh would be encoded as two characters with values of 35h and 3Fh, which map to the ASCII characters “5” and “?”, respectively. 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 8-6...
Remote Flight Service Station < Unicom Mandatory Frequency > No type specified Undefined Center Automated Surface Observing Station Class B Class C Radio Enroute Enroute Flight Advisory Service or Flight Watch 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 8-7...
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Data Format CHARACTER DESCRIPTION Gate Helicopter Information Weather Terminal Pilot controlled lighting Multicom Radar Operations Ramp Reserved - Undefined 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 8-8...
14 = Request Unit Display Information. Message sub-id; set to (ASCII) 1 for Request COM Audio Volume, 0 otherwise. “00” Reserved. MESSAGE EXAMPLE $PGRMC0613000<chksm><CR><LF> Request the GTR to send the current COM status. 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 8-9...
3 = third 8.33 kHz channel offset (.015) MESSAGE EXAMPLE $PGRMC054<JP0<chksm><CR><LF> Append 122800 to the end of the airport frequency list at index 4 with a frequency type of UNICOM. 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 8-13...
MESSAGE EXAMPLE $PGRMC15F0N0ABC I<chksm><CR><LF> Set the active COM frequency to 118.000 MHz, the transceiver to normal (not monitor) mode, and the displayed text to ABC<sp> along with the Information frequency type. 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 8-14...
MESSAGE EXAMPLE $PGRMC16F0N0ABC I<chksm><CR><LF> Set the standby COM frequency to 118.000 MHz, the transceiver to normal (not monitor) mode, and the displayed text to ABC<sp> along with the Information frequency type. 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 8-15...
Frequency index (000 to 299) Number of sequential frequencies to delete (minimum 001 to 300) MESSAGE EXAMPLE $PGRMC18000010<chksm><CR><LF> Delete ten entries from the COM frequency lookup table starting at index 0. 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 8-16...
Message class. This is a GTR COM message. “19” Message identifier. Key press: F = Flip-Flop key; M = MON key. MESSAGE EXAMPLE $PGRMC19M<chksm><CR><LF> Toggle the standby frequency monitor mode. 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 8-17...
Table 8-24 COM Software Version Message Format CHARACTER DESCRIPTION “C” Message class. This is a GTR COM message. “03” Message identifier. vvvv Software version in ASCII. MESSAGE EXAMPLE $PGRMC030100<chksm><CR><LF> COM Software version is 01.00. 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 8-19...
Display application software version, including ASCII decimal, with no leading (v)v.vv zero for software versions less than 10.00. MESSAGE EXAMPLE $PGRMC14GTR 205,006-B3896-02,2.11<chksm><CR><LF> A GTR 205 with software product number 006-B3896-00, software version 2.20. 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 8-20...
Set Standby COM Frequency With Identifier COM Transceiver Status Set COM Frequency Lookup Table Entry Remove COM Frequency Lookup Table Entries COM Keypad Input COM Transceiver Status Notes Class: “C” = GTR COM message. 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 8-21...
Upon Request / Status Change COM Software Version Upon Request COM Communications Error When Error Detected At Startup / Upon Request / COM Radio Status Status Change Unit Display Information Upon Request 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 8-22...
2. IF THE FRONT LIP OF THE MOUNTING RACK IS BEHIND THE SURFACE OF THE AIRCRAFT INSTRUMENT PANEL, THE UNIT CONNECTORS MAY NOT FULLY ENGAGE. 3. TOLERANCE: +0.03" Figure 9-4 Panel Cutout Detail 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 9-5...
DURING INSTALLATION OF THE MOUNTING RACK, ENSURE EDGE OF THE TAB (TOP & BOTTOM FLANGE OF THE RACK) IS FLUSH WITH THE FACE OF THE INSTRUMENT PANEL Figure 9-6 Mounting Rack 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 9-7...
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• ~ indicates any available similar functioning port or pin may be used. Ports or pins without ~ must be connected as shown • * indicates an active low pin. • † indicates an active high pin. 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 10-2...
THE SUPPLIED CONFIGURATION MODULE HARNESS USES 28 AWG WIRE. USE THE CONTACTS SUPPLIED WITH THE CONFIGURATION MODULE. LIGHTING BUS NOT APPLICABLE TO THE GTR 205xR. CONFIGURATION MODULE NOT APPLICABLE TO THE GTR 205xR. Figure 10-3 Power Lighting Configuration Interconnect 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 10-5...
CONFIGURE RS-232 OUTPUT TO "MAPCOM" FORMAT. RS-232 OUTPUT PORT 1 OR PORT 5 MAY BE USED. CONFIGURE RS-232 OUTPUT TO "AVIATION OUTPUT 1" FORMAT. ANY AVAILABLE RS-232 OUTPUT PORT MAY BE USED. Figure 10-4 GTR 205x GPS Interconnect Sheet 1 of 2 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev.
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USED. CONFIGURE GTR GPS NAVIGATOR STATUS TO "PRESENT". USE EITHER HSDB (ETHERNET) OR RS-232, NOT BOTH. HSDB (ETHERNET) IS THE PREFERRED CONNECTION. Figure 10-4 GTR 205x GPS Interconnect Sheet 2 of 2 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1...
CONFIGURABLE DISCRETE INPUT 4 DEPICTED. ANY AVAILABLE CONFIGURABLE DISCRETE INPUT MAY BE USED. SPLICE COM AUDIO LO AND MIC AUDIO IN LO TOGETHER INTO THE SAME PIN ON AUDIO PANEL. Figure 10-5 Audio Panel Interconnect 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev. 1 Page 10-8...
USE ONLY CAN OR RS-232 OR HSDB (ETHERNET), NOT MORE THAN ONE. HSDB (ETHERNET) IS THE PREFERRED CONNECTION. IF NOT CONNECTED FOR HSDB (ETHERNET), CAN IS THE PREFERRED CONNECTION. Figure 10-6 GTR 205x/GTR 205xR EFIS Interconnect Sheet 1 of 2...
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RS-232 PORT 1 DEPICTED FOR GDU 4X0. ANY AVAILABLE PORT MAY BE USED. THE #1 NAV/COM MUST BE ON A LOWER NUMBERED RS-232 PORT ON THE GDU. CONFIGURE RS-232 PORT FOR "GARMIN VHF NAV/COM". HSDB (ETHERNET) PORT 1 DEPICTED FOR GDU 700()/1060. ANY AVAILABLE HSDB (ETHERNET) PORT MAY BE USED.
IF CONFIGURED FOR STEREO IN, AUX 3 WILL ACT AS STEREO RIGHT AND AUX 4 WILL ACT AS STEREO LEFT. DO NOT CONNECT THE SPEAKER GROUND RETURN TO THE AIRCRAFT CHASSIS. THE GROUND RETURN MUST GO TO THE GTR. Figure 10-7 GTR 205x/GTR 205xR Intercom Interconnect 190-02766-21 GTR 205x/GTR 205xR Installation Manual Rev.
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