MyFlyDream AAT User manual

MyFlyDream
Automatic Antenna Tracker
Manual
V2.0
www.MyFlyDream.com

Notes
Thank you for purchasing the MyFlyDream Automatic Antenna Tracker (hereinafter
referred to as MFD AAT).
Please follow this manual to get familiar with the tracker and operate it correctly.
The tracker is a precision mechanical and electronic device. Please read this
manual carefully to avoid device damage or body injury.
The tracker is designed for model entertainment only. Please use it in compliance
with applicable local laws. The reliability and accuracy of the tracking system
depend on a number of factors. A strong electromagnetic interference, bad GPS
status and other reasons may cause a bad tracking result. Please consider the risk
and take it yourself. Any loss caused by the tracker system is not our responsibility.
We reserve the right to continuously improve the product performance, so this
document is not necessarily in full compliance with the tracker you purchase. The
latest version of this document will be available at our website:
www.MyFlyDream.com
1.System Components
1. MyFlyDream Tracker
2. USB programmer (for firmware update)
3. Heat shrinkable tubes
4. MyFlyDream TeleFlyOSD
5. M3x8mm stainless steel screw and self-locking nut
6. MyFlyDream AATDriver

2.Working Principle
In FPV flight, in order to get a better quality of video signal reception, we wish to use
high-gain antenna. But the high-gain antenna is often accompanied by a narrow effective
angle. MFD AAT is designed to solve the difficulty to maintain directional antenna in the best
angle of reception and transmission during FPV flight.
To form a complete system, you need to mount the TeleFlyOSD module on the plane. The
TeleFlyOSD reads data from the GPS on the plane, encodes and modulates the plane
coordinates and height information and transmits them back via a wireless audio channel
(usually use wireless image transmission audio channel).
The tracker transmits the audio signal received to the AATDriver. The AATDriver
demodulates and decodes the signal to obtain the plane position information. After
comparing with the original coordinates, it gets the current plane azimuth, distance and
height, etc. relative to the tracker. Then the AATDriver transmits the information to the
tracker that drives the internal servo to make the directional antenna aimed at the plane
position.
3. Specifications
With a built-in high quality electrical slip ring, MFD AAT has the unrestrained,
continuous panning capability. There is also a built-in electronic compass which makes it
as a Plug-and-Play system without extra initialization.
Tracker:
Weight
905g
Size
165*107*40mm (Length*Wide*Height)
Input voltage
10~13V (12V is suggested)
Current consume(empty load)
100mA
Loading capacity
1KG
Tilt range
0~90 Degrees
Pan range
0~360 Degrees without limit
Tilt speed
100 Degrees/s
Pan speed
200 Degrees/s
Spare signal channels
1~7
TeleFlyOSD:
Weight（Not including the harness）
8g
Size
45 * 25 mm
Input voltage
6~13V (6V is suggested)
Current consume
200mA

AATDriver:
Weight
58g
Size
78*44*23mm (Length*Wide*Height)
Input voltage
10~13V (12V is suggested)
Current consume
100mA
Virtual GPS
Communication
baud rate
1200bps
*Virtual GPS：AATDriver can virtualize itself as a bluetooth
GPS module. It outputs the location information of the
plane with $GPGGA and $GPRMC command.
4. Connection and Commissioning
1) Connecting TeleFlyOSD
Introduction to TeleFlyOSD
部件序号
名称
1
Extension board port
2
OSD video signal port
3
UP button

4
SET button
5
DOWN button
6
Connecting pins
7
LED
8
Firmware upgrade socket
Wires color and function
颜色
名称
功能
Red
Power
Power input
Black(3 wires)
GND
Ground
Blue
SetHome
Set the tracker position
Green
GPS Data
GPS Data
Orange
GPS Power
GPS Power supply(3.3V) *
White
Audio Out
Audio output to transmitter
* Maximum current output: <80ma (13V power supply) , or < 120ma (8V power supply).
Please regard that your GPS current consumption should not exceed the limit.
Connecting TeleFlyOSD
The TeleFlyOSD can either use a separate GPS or share a GPS with other OSD.
Please refer to Connection Diagram A if a separate GPS is used. In this configuration,
the TeleFlyOSD powers the GPS.
In the diagram, the operating voltage of GPS is assumed as 3.3V. If your GPS needs
an operating voltage of 5V, refer to Appendix A.
Please refer to Connection Diagram B if a GPS is shared with other OSD. In this

configuration, the GPS and other OSD connect as usual for power supply.
See Chapter 7 “OSD Functions” for specific OSD functions of TeleFlyOSD.

Connection Diagram A (power the GPS by TeleFlyOSD)

Connection Diagram B (share GPS with other OSD)

Selecting appropriate baudrate for TeleFlyOSD
Since the output data rate of different GPS may be different, it is necessary to set the
baudrate of the TeleFlyOSD communication port directed to the GPS used. There is a
two-way DIP switch on the backside of the TeleFlyOSD module used to select baudrates:
The arrow-indicated DIP switch in the figure has an ON mark above. There may be four
different baudrates combinations via setting of this switch:
DIP Status(1-2)
Communication Bardrate(bps)
OFF-OFF
115200
OFF-ON
38400 (Default)
ON-OFF
57600
ON-ON
9600
Power on after checking correct connection. The TeleFlyOSD LED will turn on. After
a few seconds, if the TeleFlyOSD communicates with the GPS normally, the LED will blink
at half the GPS data update frequency. If the LED keeps on, check whether the GPS
connection and baudrate setting are correct.

2). Mounting tracker and AATDriver
Please mount the antenna on the antenna handler of the tracker firmly. The image
transmission receiver is suggested to be mounted on the antenna handler to avoid
electromagnetic interference and feeder fault due to repeated bending force. Specific
mounting methods should be designed according to the actual situation. The following
picture is for reference only.
Connect the AATDriver to the tracker and mount the tracker on the tripod. Do not ever
try to hold the tracker in hand to test it to avoid damage to the device. Three cables lead from
the tracker: black 5.5mm power plug, yellow video plug and white audio plug. Connect the
three cables to the corresponding jacks on the image transmission receiver. Please note that
the 5.5mm power plug is directly connected to the power supply of the AATDriver. For
example, if the power supply voltage for the AATDriver is 12V, the power plug output is 12V,
too. If the interface specifications or power supply voltage do not match your image
transmission receiver, you need some additional settings to connect them.
Finally, connect the monitor to the yellow RCA terminal of the AATDriver to view the
video signal.

3).Preliminary system test
Power on the AATDriver with 12V DC. The red LED and yellow LED on the
AATDriver will fast blink for several times and then go out. Blinking for 5 times
means the data output of the AATDriver is currently in MFD mode and blinking for 2
times means it is in VGPS mode. The meaning of the two modes will be explained in
the following chapter “Advanced Use”.
The tracker plays a “Beep” sound after power-on. The antenna handler turns to the
elevation of 30 degrees, and the red LED (offline indicator) on the tracker blinks.
That means the tracker is ready. The power indicator of the image transmission
receiver on the tracker should also turn on.
Press the TEST button on the AATDriver. The red LED on the AATDriver will turn on
to indicate it is in TEST mode. If the tracker works normally, you will see the tracker
turn as per the following parameters by pressing the TEST button in turn:
TEST sequence #
Azimuth
Tilt
1
0 (North)
0
2
90 (East)
30
3
180 (South)
0
4
270 (West)
60
5
(Quit test mode)
(Quit test mode)
It is recommended to conduct the above system test once before flight to ensure the
tracker and driver hardware and software work properly. But remember to exit test
mode before taking off, or the tracker will not start to track.
Power on the TeleFlyOSD and image transmission transmitter. The red LED on the
TeleFlyOSD should start to blink after turning on for a few seconds. If the image
transmission transmitter/receiver channels match with each other and the data link
is normal, the red RX LED on the AATDriver will fast blink. That the RX LED blinks
once means a valid packet is received.
Press and hold the SetHome button on the TeleFlyOSD. If the communication is
normal, the tracker will play a “Beep...” continuous sound, indicating the origin of
coordinates is under setting. After release the button, if the GPS does not lock more
than three satellites at the moment, the tracker will play a rapid “Beep...Beep...Beep...”
warning sound.
If the above test steps are passed through normally, it indicates the system
connection and configuration are correct and you can conduct outfield flight test.

5. How to use the AAT
Power on all equipments and use the test button on the AAT Driver to check the
tracker. Check to ensure the four pointing directions are basically correct and the
red RX LED on the AATDriver fast blinks.
It takes time for the GPS to search satellites. Wait for a while and check the GPS
status according to the blinking frequency of the yellow LED on the AAT Driver. The
higher the blinking frequency is, the better the GPS status is. In the best condition,
the yellow LED will keep on. Check to ensure a good GPS positioning status before
the next step.
Place the plane near the tracker as far as possible and press the SetHome button on
the TeleFlyOSD module for about three seconds. The tracker will play a “Beep...”
sound, indicating the origin of coordinates has been set. At the same time, the red
LED on the tracker starts to blink, and the antenna should pitch up to 30 degrees
angle. That means the tracker stands by for tracking.
You can manually spin the tracker towards the take-off direction while it is in the
standby mode to ensure the best angle of signal reception in the take-off phase,
because the tracker won’t start tracking unless the plane leaves you 10 meters away.
Take off your plane now. Once the plane leaves the tracker 10 meters away, the red
LED on the tracker turns off and the tracker immediately starts continuous tracking
(the track will not stop tracking even if the plane flies back to within 10 meters).
Notes:
Check before take-off to ensure the AATDriver is not in the test mode (the red RX
LED on the AATDriver will keep on in the test mode), and the tracker is not in the
offline mode (the red Off-Line LED on the tracker will keep on in the offline
mode). In both of these special conditions, the tracker will not track the target.
If the downlink is broken or the GPS is in a very bad status after SetHome, the
tracker will play the “Beep...Beep...” sound and the red LED blinks, warning the
tracking capability has lost. In this situation, you can spin the tracker by hand
towards the proper direction if necessary (pitch angle will maintain the angle
before loss of signal). The system will automatically resume tracking as soon as
things go well.

6. Advanced Usage
Setup and operation of the tracker
There are 3 LED indicators and buttons on the right side of the tracker. From left to right,
the buttons (LEDs) are:
Off-Line (Red)
North (Yellow)
Cal. (Green)
Common functions and operations of the tracker:
Function
How to operate
Remark
Enter/Quit
offline mode
Press the
Off-Line
button
Under offline mode the tracker
stops tracking. You can
manually turn the tracker the
direction you need.
You can press the "Off-Line" button
to enter the off-line mode. The
red light will be on to indicate the
tracker is in offline mode. Press again
the "Off-Line" button to quit the
off-line mode.
Hard iron
calibration
Press the
Cal.
button
Press the "Cal." button , the green light
will be on in 2 seconds. The tracker
starts to rotate for a while
automatically to calibrate itself.
Please wait until the green light is
off, which means the calibration is
done.
The tracker will stay in a random
direction after calibration.
North calibration
Turn the tracker in the new
“north”direction and press
the North button
When North button is pressed, the
yellow light will blink several times,
and the current alignment direction
will be recorded by the tracker
as North.
The more the yellow light blinks, the
greater the tolerance between North of
the latest set and North perceived by
the tracker.
CAUTION: it is unnecessary to
use this function in most cases.
Reset to factory
Press the Cal. Button and
After the above operation the yellow

default
then press
the North button immediately
within 2 seconds
and green lights of the tracker blink 5
times at the same time, which
indicates that the tracker resets to
the factory default settings and all
the calibration data is cleared.
CAUTION: If you don’t press North
button within 2 seconds after pressing
CAL. button,
the tracker will start to execute the
hard iron calibration.
Description of the tracker LED indicators:
Indicator
Status
Meaning
Off-Line
(Red Light)
Off
The tracker is tracking.
On
The tracker is in off-line mode.
Blinking
The tracker stands by. If you have set home
position, the tracker will start to track once
the target moves 10 meters away.
North
(Yellow Light)
Blinking
The tracker is executing the North calibration.
CAL.
(Green Light)
On
The tracker is executing the hard
iron calibration.
How to use the auxiliary channels of the tracker
There is 1 auxiliary channel available in a 6-channels tracker. And there are 7 auxiliary
channels available in a 12-channels one. Users can use these auxiliary channels to transmit
their own signals. For example, you put a data radio on the tracker, so maybe you need to
connect the TX, RX, Power and GND from the data radio to your ground device. Use the
auxiliary channels so that you can transmit the data without obstructing the tracker to rotate
continuously.
To use these aux channels you must take down the left side panel. These photos show
you how to take down the panel step by step:

After take down the left panel you will see there are 7 soldering pad on the PCB. They
are numbered from 1 to 7.
A 6 channels tracker has only a 6 pin plug. The Aux Channel 1 maps to PIN#3 of the
plug.
A 12 channels tracker has a 6 pin plug and a 7 pin plug. The 6Pin plug is used to connect
to AATDriver. PIN#3 of the 6 pin plug is a null pin. The Aux Channel 1 to 7 map to PIN#1 to
PIN#7 of the 7pin plug.
CAUTION: The maximum current allowed for each channel is 2A. Don’t exceed this limit
or the slip ring will be damaged.
Setup and operation of the AATDriver
Common functions and operations of the AATDriver:
Function
How to operate
Remark
Toggle between MFD
mode and VGPS mode
Hold down
the HOME button to
power on
After power on, the yellow LED or the
red LED of AATDriver will blink rapidly.
The rapid blink of the yellow LED indicates
that the current mode is VGPS mode, the
blinking red one indicates the MFD mode.

Power off and then power on again,
AATDriver starts work with the new mode.
Every time you power on with holding
HOME button, AATDriver will toggle
between the two modes
Every time power on in a normal state,
the yellow and the red lights of AATDriver
will blink several times. 2 times is currently
under VGPS mode, 5 times is currently
under MFD mode.
Set the origin
coordinate for
tracking
Press the Home
button
The current coordinate of the aircraft will be
recorded as the origin. The tracker needs a
origin to track.
Description of the AATDriver LED indicators:
Data mode
Baudrate
Remark
RX
(Red Light)
Off
No data received.
On
It is currently under test mode.
Blinking
Downlink data is received successfully .
GPS
(Yellow Light)
Off
GPS is not fixed.
On
GPS is in a perfect status. (10 or more
satellites are locked)
Blinking
Indicating GPS status. The faster the blink
frequency, the more satellites locked.
The relationship between the blink
frequency and the number of the
locked satellites:
0.5HZ: 1 ~ 3 satellites
1HZ: 4 ~ 5 satellites
2HZ: 6 ~ 7 satellites
5HZ: 8 ~ 9 satellites
Connect AATDriver to external devices
The AATDriver has a built-in Bluetooth module. So you can connect your laptop or
mobile devices to the AATDriver to view and record the real-time flight data. The Bluetooth
password is set to “1234”.
The AATDriver has two data output modes: MFD mode and VGPS mode.
Data mode
Baudrate
Remark
MFD
1200bps
The AATDriver outputs data to
external device with 5HZ rate in MFD mode.

MFD protocol contains more information
about the plane than VGPS mode.
You can use the ground station software
provided by MyFlyDream to check the
data. Currently it runs on
the J2ME platform (need JSR82 support).
The android version is also coming soon.
VGPS
1200bps
The AATDriver outputs data in GPS format
(only $GPGGA and $GPRMC sentence, a subset
of the NMEA 0813protocol).
With a variety of navigation software or
GPS software you can check the plane’s
track and coordinates.
VGPS mode has better compatibility with
most hardware and software.
View flight information with your iPad:
1. You must jailbreak your iPad to connect to the AATDriver.
2. Install the MotionX HD software.
3. Install the BTStack GPS software and connect the AATDriver after discover it
(make sure the AATDriver is in VGPS mode). The connection password is 1234.
The BTStack GPS should be able to correctly read coordinates from the
AATDriver.
4. Press the “HOME” key on iPad and then run the MotionX HD to check and
record the flight path data of the plane.
The Android system has software similar to BTStackGPS to help connect
your cellphone to external Bluetooth GPS, e.g., BluetoothGps.
Here are some screenshots of the MotionX running on the iPad:
View flight information with the ground station software FDStation of the J2ME:
FDStation is a J2ME program. Your cellphone must be compatible with CLDC 1.1

and MIDP 2.0, and also support the Bluetooth API (JSR 82) to run it.
The FDStaion software can be downloaded from:
http://www.myflydream.com/Help1.aspx
After installing and running the software, search for the AATDriver and use 1234 as
password to establish a connection.
Here are some screenshots of the FDStaion software:
DataView :
PathView:

Keys definition of the FDStation software:
Left: Toggle between DataView and PathView
Right: Rotate the screen 90 degrees in DataView
Up/Down:
Scroll the screen in DataView mode
Zoom in/Zoom out in PathView mode
7. OSD Functions
The TeleFlyOSD provides OSD functions that can overlay the flight information on the
camera videos. See “Connection Diagram A” in Chapter 4 for specific connection.
The three pinouts of the OSD video signal interface (part No.: 2) in the following picture
are defined as follows:
A (Video In)
B (Gnd)
C (Video Out)
Video input
(Connected to the camera)
Ground
Video output
(Connected to the AV Transmitter)

There are invalid Vid-in and Vid-out marks on the TeleFlyOSD PCB of some batches. The
above description shall prevail.
Purpose of the three buttons numbered 3, 4 and 5 in the picture:
Part #
Name
用途
3
UP Button
Select the previous item
4
SET Button
Enter a menu list，Or change the current item
5
DOWN Button
Select the next item
If the system is connected properly, you can see the following pictures on the video monitor
after the TeleFlyOSD is started.
The reading meaning of various parts in the picture has been marked.
Each time you press the “SetHome” button, the flying time is reset to 0.
Before you press the “SetHome” button, the distance to home is not available and displayed
as N.A.
By pressing the “UP” switch, you can enter to view the GPS status data interface.
By pressing the “DOWN” switch, you can enter the interface without OSD data displayed.
By pressing the “SET” switch, you can enter the following interface of system options: