MotionRC Detrum GAVIN-8C Owner's manual

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Motion RC Supplemental Guide for the
Detrum GAVIN-8C
Transmitter
Version 1.0

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Motion RC Supplemental Guide for the Detrum GAVIN-8C Transmitter
Contents
Review the Transmitter’s Controls ................................................................................... 1!
Review the Home Screen ................................................................................................. 2!
Power the Transmitter ...................................................................................................... 3!
Calibrate the Transmitter .................................................................................................. 3!
Create a Model ................................................................................................................. 4!
Bind a Receiver to a Model .............................................................................................. 5!
Configure a Throttle Hold Switch ...................................................................................... 6!
Prepare to Program an Airplane ....................................................................................... 7!
Program Servo Direction .................................................................................................. 8!
Program Servo End Points ............................................................................................... 9!
Program Servo Sub Trim ................................................................................................ 10!
Program Dual Rates and Expo ....................................................................................... 11!
Set the Switch to Control Channels ................................................................................ 16!
Configure a Gyro ............................................................................................................ 17!
Set Timers ...................................................................................................................... 23!
Perform a Range Test .................................................................................................... 24!

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Motion RC Supplemental Guide for the Detrum GAVIN-8C Transmitter Page 1
This guide provides instructions to help you program the Detrum GAVIN-8C for an airplane.
Additional information can be found in the manual included with the radio.
Review the Transmitter’s Controls
1. Power switch—push the switch up to turn the transmitter on.
2. Status light—illuminated when the transmitter is turned on; flashes when in range test
mode.
3. Trim buttons—push to set the trim for the associated channel.
4. Control sticks—control the channel to which they are connected.
5. SA, SB, SD, SE switches—three-position switches that can be used for a variety of
functions.
6. SC switch—a two-position switch that is spring-loaded; when held against the spring, the
transmitter passes control to another transmitter to which it is connected. You also use

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this switch to bind the transmitter to a receiver.
7. SF switch—a two-position switch that is usually used for retracts.
8. Display screen—displays different pages of information while you are controlling a
model or programming the transmitter. After a time of inactivity, the screen dims. Press a
button to return the screen to full brightness.
Review the Home Screen
1. System timer—how long the transmitter has been turned on.
2. Battery status—how much charge remains in the batteries by percentage and icon.
3. AIL, ELE, and RUD Dual rate status—These indicators show the dual rate setting
currently applied to each of these channels.
4. Hold indicator—when HLD is displayed, throttle hold is on and the motor won’t spin
when throttle is applied; when NORM is displayed, the throttle is active.
5. Percent of throttle—indicates how much throttle is being applied.
6. Timer 1—displays a countdown or count up timer, typically triggered by throttle or
HOLD switch position. When the timer expires, you hear a tone and the timer flashes.
7. Timer 2—provides a second timer with the same capabilities as timer 1.
8. Trim indicators—the shaded part of the trim indicator indicates how much trim is applied
to the associated channel and in which direction. When you are setting trim, the
numerical value is displayed at the end of the trim indicator.
9. Active model—you see the name of the active model, which means the model that can be
flown or programmed.

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10. UP button—use this to highlight options on the screen when you program the transmitter.
11. DOWN button—use this to highlight options on the screen.
12. EXT button—press this to move back to the previous screen.
13. ENT button—press this to select a highlighted menu option. You also use it to enter
range test mode.
14. R/+ button—press to increase values when you are programming the transmitter (hold
down to rapidly scroll through options).
15. L/- button—press to decrease values when you are programming the transmitter.
Power the Transmitter
1. Remove the battery cover from the back of the transmitter.
2. Install 4 AA batteries per the diagram in the battery well.
3. Replace the battery cover.
4. Push the power switch on (up). The transmitter turns on, the home screen appears, and
you are ready to calibrate the transmitter.
Calibrate the Transmitter
1. When the home screen is displayed, press the ENT button.
2. Use the UP or DOWN buttons to highlight System Set.
3. Press the ENT button.
4. Use the UP or DOWN buttons to highlight Calibration and press the ENT button.
5. Move both sticks through their full range of motion top to bottom and side to side (you

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can move them at the same time or individually). You see a representation of the stick
motion and positions on the screen as you move the sticks.
6. Place both sticks in their neutral positions.
7. Press the ENT button. If successful, you see the “Completed!” message on the screen. If
not, repeat these steps until it is calibrated successfully.
Create a Model
1. From the home screen, press ENT.
2. Use the UP or DOWN buttons to highlight Model Set and press the ENT button.
3. Use the UP or DOWN buttons to highlight Model and press the ENT button.
4. Highlight the position of the model you want to create, such as MODEL02 and press the
ENT button.
5. Highlight Name and press the ENT button.
6. Press the Up and DOWN buttons to select the character of the existing name you want to
change; the current position is marked with a square.
7. Press the R/+ and L/- buttons to choose the character you want in the current position.
You can choose from UPPERCASE letters, lowercase letters, numbers, or special
characters. Hold the R/+ or L/- buttons down to rapidly scroll through the available
characters.
8. Press the Up or DOWN button to select the next position.
9. Press the R/+ and L/- buttons to choose the character you want in the current position.
10. Repeat steps 8 and 9 to complete the model name. You can choose the space character to
“erase” an existing character.
11. Press ENT to save the new name.

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12. Highlight Type and press ENT.
13. Use the Up or DOWN buttons to highlight the kind of model you are creating, such as
AIRPLANE, and press ENT. (This guide shows an airplane model, you can configure
other types using similar steps.)
14. Press EXT twice to return to the home screen. You should see the name of the model you
created on the screen, indicating it is the active model.
Bind a Receiver to a Model
1. When the home screen is displayed, press ENT.
2. Select Model Set and press ENT.
3. Select Model and press ENT.
4. Highlight the model you want to bind to the receiver and press ENT. The model you
selected becomes active.

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5. Press EXT twice to move back to the home screen.
6. Turn the transmitter off.
7. Connect the receiver to at least one servo and to the ESC.
8. If you are using a receiver that has a BIND port, follow steps 9 and 10; if you are using a
receiver with a Bind button, follow steps 11 and 12 instead.
9. Insert the Bind plug into the BIND port.
10. Power the receiver by connecting a battery to the ESC. The Bind light on the receiver
flashes indicating that it is in Bind mode. Skip to step 13.
11. Power the receiver by connecting a battery to the ESC. The Bind light flashes rapidly.
12. Hold the Bind button down until the Bind light flashes more slowly.
13. Hold the SC switch in the forward position (toward the front of the transmitter) and turn
the transmitter on. You hear the bind tone on the transmitter and the Bind light on the
receiver becomes solid, indicating the bind process is complete.
14. Move the control associated with the servo you connected to ensure it moves. If so, the
model is bound. If not, repeat this process until it is successful.
15. Power off the receiver and remove the Bind plug (if applicable).
16. Power off the transmitter.
Configure a Throttle Hold Switch
You should have a throttle hold switch on the transmitter that disables the throttle to minimize
the chances of an accident due to a prop or EDF spinning unintentionally.
1. Turn the transmitter on and use steps 1-5 in the previous task to select the model you
want to program. Confirm that the model you want to program is shown on the home
screen.
2. Press ENT.
3. Select Func Set and press ENT.

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4. Select THR Hold.
5. Use the Up or DOWN buttons to select the switch you want to use for the throttle hold
switch. If the plane you are programming doesn’t have retracts, put the throttle hold on
the SF switch because it is a two-position switch. If the model does have retracts, you
should use one of the other switches.
6. Press EXT twice to return to the home screen.
Prepare to Program an Airplane
1. Connect the ESC to the THRO channel on the receiver.
2. Connect the aileron, elevator, and rudder servos to their respective ports on the receiver.
3. Connect the retracts to the GEAR port.
4. Connect the flap servos to the AUX1 port.
5. Turn the transmitter on and use steps 1-5 in the “Bind a Receiver to a Model” task to

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select the model you want to program. Confirm that the model you want to program is
shown and has been bound to the receiver.
6. Check to ensure HLD appears on the home screen, indicating the throttle hold is active; if
you don’t see HLD, move the throttle switch that you set in step 5 of the previous task to
the opposite position; if you are using switch SF, this requires one click while if you
selected one of the three-position switches, you need to move the switch through two
clicks. HLD should appear on the home screen, which means the throttle is inactive and
programming the model is safer because you won’t get unintended prop or EDF spinning.
If HLD doesn’t appear, perform the steps in the previous task to ensure you have
configured a throttle hold switch.
7. Connect a battery to the ESC. You should hear the startup tones from the ESC and see a
solid light on the receiver.
8. Ensure that a spinning prop or EDF is not a safety hazard, set the throttle switch to the off
position (NORM appears on the home screen indicating the throttle is in normal
operation mode), and slowly advance the throttle to ensure the motor spins.
9. Return the throttle hold switch to the on position so the motor no longer spins; you see
HLD on the home screen.
10. Systematically check each control surface for movement including rudder, ailerons,
elevator, flaps, and retracts. You can change direction and amount of movement later,
now you are ensuring the transmitter can activate the controls correctly.
11. After you’ve confirmed all the model’s controls are working, you are ready to do the
detailed programming of the model.
Program Servo Direction
1. Set the correct direction for each servo using the Rev Set function; to access this from the
home screen, press ENT, select Model Parameter, press ENT, select Rev Set, and press
ENT. You move to the Rev Set screen where you see the current servo direction (Norm
or Rev) for each channel. You also see a visual representation of the channel’s position
and direction of motion on the right side of the screen. The numbers on the far right are
the current trim setting for the channels.
2. Check the direction of motion for a control surface, such as the elevator. If the direction
needs to be reversed, perform step 3; if not, skip to step 4.