Garmin GTN Series

GTN 750 (GTN 725 does not have Com and Nav functions)

(Xpdr & audio controls not present for Robinson installations)

GTN 650 (GTN 635 does not have Nav functions)

(GTN 625 does not have Com or Nav functions) (Xpdr Controls not present for Robinson installations)

Power

• There is no On/Off control. Unit switches on and off with avionics master switch. VHF Com Operation (GTN 635, 650, and 750)

• Com frequencies are upper left for GTN 7xx series and upper right for GTN 6xx series.

o ACTIVE frequency is on top in GREEN.

o STANDBY frequency is below in BLUE.

o To adjust volume, use the upper left hand knob.

o To open squelch, push and release the upper left hand knob. SQ appears above active frequency. Push and release again to close squelch. Caution – pushing and holding volume knob for more than 2 seconds will select

the emergency frequency (121.50) and make it the active frequency.

• To tune via knobs:

o Use the lower right hand large and small knobs. Large knob tunes in 1 MHz steps, small knob in either 25 KHz or 8.33 KHz steps depending on radio configuration.

• To exchange (flip-flop) the active and standby frequencies via knobs:

o Press and hold the small, lower, right hand knob.

GTN 750 Com Frequencies

GTN 635/650 Com Frequencies

Tuning Knobs

• To tune via touch screen:

o Touch the standby frequency and type the desired frequency on the on-screen keypad.

o Then, touch “enter” to place the new frequency in standby or touch “xfer” to make it the

active frequency.

• To exchange (flip-flop) the active and standby frequencies via touch screen:

o Touch the active frequency.

• Standby frequency may be monitored.

o Touch the standby frequency.

o Touch the Monitor button on the screen. Mon appears above the standby frequency.

Frequency Tuning Keypad Screen

Nav Operation (GTN 650 and 750)

• For units with VHF NAV (GTN 650 and GTN 750), Nav frequency info is:

o Upper right for GTN 750.

o Behind Com frequencies for GTN 650.

o Pressing and releasing the small, lower, right-hand knob toggles control between Nav and Com control.

“Com push for nav” or “Nav push for com” will be displayed next to knob.

o Touch screen or knobs may be used for tuning similar to Com. On GTN 650, it will be necessary to toggle to Nav control to show the Nav

frequencies on the screen (the smaller screen does not have a dedicated Nav display area).

GTN 750 Nav Frequencies Push Small Knob to Change to Nav

Control

GPS and Main Display Operation (All GTNs)

• Home screen shows all basic functions.

o “Buttons” appear on the home screen to touch for a function (e.g. Map, Traffic).

o For GTN 6xx, use arrow keys to see next row of functions.

o Dedicated Home button (upper right on unit bezel) will always return you to home screen.

o For most screens, a “Back” button appears which will take you to the previous screen.

GTN 750 Home Page

GTN 650 Home Page

Home and Back Buttons

• Dedicated Direct To button (lower right) quickly accesses direct-to navigation.

o Waypoint may be entered using touch keypad or lower right hand knobs. Not a full keypad on GTN 6xx, touch letter bar to select a letter block.

• Once a direct-to waypoint is activated, unit goes to map page.

Direct To Button

Direct To Interface Screen

GTN 7xx Waypoint Entry Keypad

GTN 6xx Waypoint Entry Keypad

• Most often used function is basic moving map “Map”.

o Map range is adjusted using magnifying glass keys.

Note that if map is accidentally touched in map mode, unit enters Pan mode (annunciated on screen, see Garmin Pilot’s Guide). Map behavior is different in pan mode. Touch the “Back” button which appears on the screen to go back to basic moving map.

Map Function Button

GTN 7xx Map Screen

GTN 6xx Map Screen

Pan Mode Annunciation

• Map Menu button accesses options for map display.

o Map declutter is adjusted using menu button on screen and slider bar. See Garmin Pilot’s guide for declutter levels.

Map Menu Button

Map Menu Screen

Message Annunciations

• Units have the capability to report abnormal functioning and/or additional operational information to the pilot via status messages.

• When a new status message is generated, a message button appears and begins flashing in the

lower left area of the screen.

o Messages are not emergency conditions and may be viewed at pilot discretion.

Never allow a message to distract from primary flying duties.

o To view a message, touch the message button. Then, touch the back button to return to the previous screen.

o Once messages have been viewed, the message button will stop flashing. Flashing will

start if a new message is generated.

o If conditions which generated messages no longer exist, messages will clear themselves and the message button will disappear.

Message Screen

Glove Use

Garmin GTR 225B

Power

• The upper left hand (power/volume) knob will switch the unit off when rotated all the way counterclockwise into a detent. Rotating clockwise out of the detent switches the unit on.

o It is not necessary to use the knob to turn the unit on and off. Knob may be left at the

desired volume setting and avionics master switch may be used to control power. Frequency Tuning

• Concentric knobs at lower right adjust the standby (right hand on display) frequency.

o Large knob tunes in 1 MHz steps, small knob tunes in 25 KHz or 8.33 KHz steps depending on radio configuration.

• Frequency transfer button exchanges standby and active (left hand on display) frequencies.

o Caution – pushing and holding the frequency transfer button for more than 2 seconds will select the emergency frequency (121.50) and make it the active frequency.

Garmin GTR 225B

Standby Frequency Monitor

• The MON button allows the standby frequency to be monitored. Active frequency receptions will have priority.

o MN will appear next to the standby frequency.

Frequency Identification

• When properly connected to a GPS with a valid satellite signal, an internal database will allow the radio to display the names of the nearest stations associated with the active and standby frequencies (e.g. KLAX TWR).

o If there is no associated station name or no GPS signal for geographic reference, the

frequencies will be identified as “COM ACTIVE” and “COM STANDBY”. Other Functions

• Other functions including looking up frequencies for the nearest airport or for a particular airport by airport identifier are available. Refer to the GTR 225B Pilot’s Guide.

• If any functions are activated inadvertently, press the COM button to return to standard Com

display and functionality.

Identified Frequencies

Monitor Annunciation and Unidentified Frequencies

Monitor Button

GMA 350H Audio Control Panel Power

• There is no On/Off control. Unit switches on and off with avionics master switch. Selecting Primary (Active Transmit and Receive) Radio

• Transmit radios are selected using the MIC keys.

• Receive radios are selected using the COM keys.

• To make radio number 1 the active transmit radio, press and release MIC1.

o The triangular LEDs above MIC1 (transmit, radio 1) and COM1 (receive, radio 1) will illuminate green.

o The associated COM (receive radio) is always selected when a MIC selection is made.

Monitoring Additional Radios

• Additional radios may be selected for monitoring using the COM keys.

o Green LED will illuminate for each radio selected for monitoring. Monitored COM Muting

• Press and hold a COM button to enable or disable muting of an additional monitored radio during reception on the primary radio.

o A recording will play in the headset: “Mute monitored Com on Primary Com reception

enabled” or “Mute monitored Com on Primary Com reception disabled”.

Garmin GMA 350H

Intercom

• PILOT, COPILOT, and PASS buttons are for intercom control.

o PASS button controls setting for all passenger seats simultaneously.

• Green LEDs indicate configuration (various connection and isolation modes). See Pilot’s guide for details.

• For standard intercom mode, press and release each button (PILOT, COPILOT, and PASS) until the green LED above each is illuminated.

o With all 3 LEDs illuminated, all seats can hear the aircraft radios and can hear each other

via intercom.

• Options to mute intercom during radio reception are discussed in the pilot’s guide. Headsets

• Stereo headsets are recommended.

o A person using a mono headset hears only the left stereo channel in both ears.

o If a mono headset is plugged into any of the passenger stations, all passengers hear mono audio only.

o See pilot’s guide for details.

Sample Intercom Configuration – Pilot Isolate Mode

Recommended Basic Intercom Configuration – All Occupants Connected

Intercom Volume

• To access intercom volume adjustments, press and release the small (outer) knob.

o The LED above the PILOT button will begin flashing. The flashing LED serves as a cursor to indicate which volume level is being adjusted.

o Volume level is indicated by the green bar to the left of the knob.

• Volume is adjusted by turning the small knob.

o To adjust the volume for copilot or passengers, turn the large knob until the cursor

(flashing LED) is in the desired position, then turn small knob to adjust volume.

o After volume adjustments, cursor will time out (flashing stops) after a few seconds or it may be manually turned off by pressing and releasing the small knob.

• Intercom volume does not affect radio receive volume

Intercom Squelch

• Unit has automatic squelch which compensates for varying ambient noise levels to allow comfortable voice-activated conversation in most situations.

o If a different squelch level is desired, press and release the MAN SQ button. Green LED

will illuminate, and squelch level will be indicated by green bar to left of knob control.

o Turn small knob to adjust intercom squelch level.

o To return to automatic squelch, press and release MAN SQ button to extinguish LED.

Volume and Squelch Adjustments

Cyclic-Mounted Radio Controls

• FREQ XFER and USER FREQ buttons are connected to Com radio no. 1.

o Radio numbers are indicated with a label near each radio. If only a single Com radio is installed, it will be no. 1 by default.

• Pressing and releasing FREQ XFER exchanges the active and standby frequencies on the no. 1

Com radio.

o Caution – pressing and holding the FREQ XFER button for more than 2 seconds selects the emergency frequency (121.50 MHz) and locks it as the active frequency. If this happens inadvertently, press and hold again to unlock.

• The USER FREQ buttons allow scrolling forward and backward through a list of pre-programmed

user frequencies. Each time a USER FREQ button is pressed, the next frequency in the list is placed in the standby frequency window of the no. 1 Com radio.

Cyclic with Radio Controls

Aspen Displays

Primary Flight Display (PFD)

Aspen EFD1 00H Primary Flight Display

Functionality

• Attitude Indicator, Directional Gyro, Airspeed, Altitude, and Vertical Speed displays.

o Directional gyro is magnetically slaved. No need to set heading.

o A situational awareness stick map of flight plan and waypoints may be under-laid with directional gyro

Range for underlay controlled by range button on bezel Declutter for underlay controlled via Menu (see Menu section) Green parallelograms indicate declutter level – more green = more features

• Airspeed and altitude displays are secondary. The mechanical instruments serve as the primary references and are the required, installed instruments.

• Additional optional functions detailed in Pilot’s Guide.

Situational Awareness Map with Range and Declutter Indications (No Green Parallelograms = Map is Off)

Knob Controls

• Each knob can be rotated (clicks through detents as rotating) or can be pushed in and released like a pushbutton.

o Knobs are designed to prevent inadvertent actuation by requiring a “wake up” action.

o First click or press wakes up the knob.

Label changes color from cyan to magenta. Once label is magenta, the labeled quantity can be adjusted by rotating the knob.

o Press the knob additional times to cycle through labels (functions) for the knob.

• Left knob controls course setting and airspeed bug.

• Right knob controls heading bug, altitude bug, baro (altimeter) setting, and approach minimums.

Knob Controls with Course and Heading Labels Shown

Hot keys

• Hot keys are on the right side of the bezel and have labels on the screen next to them.

• Functionality is indicated by the screen label (not always the same for a given button).

• A summary is as follows. See pilot’s guide for details.

Hot Key Functions

Menu Button

• Displays a menu of additional settings/functions on the screen.

o Menu has multiple pages.

o Pages are scrolled through by rotating right hand knob.

o Page indication is shown at bottom of screen.

• Make a menu item active by pressing the hot key next to it.

o Then, rotate the right knob to change the menu item value.

• Press the hot key again to make the menu item inactive, or allow the selection to time out.

• Press the menu key again to turn off the menu overlay.

Menu Button

Menu Display on Screen

Altimeter Setting

• Press and release the hot key (lower right) with the screen label “BARO”.

o Altimeter setting will turn from Cyan to Magenta.

• Rotate right hand knob to desired setting.

• Press and release BARO again or allow setting mode to time out. Display Lighting

• Normally controlled automatically by photocell.

• To control manually, press and release MENU button.

o BRT AUTO PUSH MANUAL appears above left hand knob.

• Press and release left hand knob.

• Rotate left hand knob to desired brightness.

• Press and release MENU to turn off menu display on screen.

Automatic and Manual Brightness Indications (After Pressing Menu Button)

Failure Annunciations

• Unit continuously performs self-tests for data integrity. If integrity is in question or a sensor fails, one of the above indications may occur (red x indications can also occur for failed airspeed or altitude sensors).

o These are not emergency conditions.

o Do not be distracted if a failure annunciation occurs.

o Continue to fly by visual reference and mechanical airspeed indicator and altimeter.

o Have unit serviced after flight.

Back-Up Battery

• Unit has an internal battery in the event that aircraft power is lost.

• A battery annunciation appears on the screen when the unit is operating on its internal battery.

• The internal battery recharges from the aircraft power bus when aircraft power is supplied.

Possible Failure Annunciations

Multifunction Display (MFD)

Aspen EFD500H MFD

Functionality

• Moving map, terrain, traffic, and charts.

• Screen may be configured as 1, 2, or 3 windows.

o Left hand knob (Pg) cycles from: Pg 1/3 (single, full-screen window) to Pg 2/3 (split screen) to Pg 3/3 (large lower window with 2 small upper windows).

• Right hand knob (view) selects what is being shown in each window.

• For screens with more than1 window, push right hand knob then rotate to select window.

o Selected window will be highlighted in magenta.

• After selecting window, push right hand knob again then rotate to select view.

• Map cannot be shown in the smaller windows.

Hot Keys and Menu

• Function similarly to PFD

Back-Up Battery

• Same as for PFD.

Quiz

1. For the GTN series touch screen units, the two dedicated bezel buttons are: a) On and Off b) Home and Direct To c) Com and GPS d) Menu and Back Answer: b 2. A source of unwanted Com noise or unwanted received transmissions may be: a) Accidentally monitoring the Com standby frequency on either the GTN series or the GTR 225B b) Accidentally monitoring the Nav frequency on the GTN 650 or GTN 750 via the audio panel c) Accidentally having the squelch open on the GTN series or the GTR 225B d) All of the above Answer: d 3. For the GTN series touch screen units, which of the following may be accomplished without using the touch screen? a) Com frequency selection b) Simple direct-to Navigation c) Map declutter d) a and b Answer: d 4. For either GTN or GTR Com radios, it is possible to inadvertently select the emergency frequency without tuning it. True False Answer: True

5. For the GMA 350H audio panel, which buttons control the primary (transmit) radio: a) COM b) MIC c) PILOT d) AUX Answer: b 6. For the GTN series units, message indications: a) May be viewed at the pilot’s convenience b) Should be read immediately in case they warn of an emergency c) Should never distract from primary flying duties d) a and c Answer: d 7. A nervous pilot who inadvertently holds down the freq xfer button on the cyclic for too long: a) Will lock the no. 1 com radio to the emergency frequency b) Should not be allowed to fly solo c) Will cause the active and standby frequency to be exchanged many times d) May damage the com radios Answer: a 8. Which controls are used to adjust the altimeter setting on the Aspen PFD? a) Lower, left knob b) Alt button c) Baro button and lower right knob d) Unit automatically adjusts altimeter setting Answer: c

9. If the Aspen PFD displays a “Cross Check Attitude” message, or a Red X: a) Land immediately b) Cycle power to the unit to see if it will reset c) Continue to fly normally using outside visual reference and other installed instruments d) Proceed to the nearest maintenance facility Answer: c

10. Which controls are used to manually adjust the display brightness on the Aspen PFD? a) Bright button b) Backlight button c) Lower, right knob d) Menu button and lower right knob Answer: d

11. Regarding use of gloves with the GTN touch screen units a) Gloves may never be used because the touchscreen will not respond to gloved fingers b) Gloves may be used. However, each type must be tested per the pilot’s guide prior to use c) The GTNs use advanced technology and will work with any type of glove d) It is recommended to use a set of gloves with the fingertips snipped of for optimal performance Answer: b 12. Use of a mono (rather than stereo) headset with the GMA 350H audio panel a) Will not work. No audio will be heard. b) Should never be attempted because the GMA 350H will be damaged c) Will cause the wearer to hear the left stereo channel in both ears d) Will cause distorted audio for the pilot Answer: c