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MyFlyDream Crossbow AAT Manual

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Crossbow AAT
Manual
V 1.1
2019-Aug-29
www.MyFlyDream.com

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Summary of Contents for MyFlyDream Crossbow AAT

  • Page 1 Crossbow AAT Manual V 1.1 2019-Aug-29 www.MyFlyDream.com...

  • Page 2: Product Introduction

    High-gain antennas are known for very narrow angles of effective reception. For its successful operation, Crossbow AAT requires the flight data such as latitude and longitude of the tracked target (UAV) at every given moment, as well as its altitude.

  • Page 3: Installation And Wiring

    TeleFlyTiny module on the aircraft will be transmitted to the Crossbow AAT through the serial port . 3. Transmitting information of the tracked target over a wireless digital data link from the UAV to the ground station. MAVLink protocol allows to transmit the information from the UAV through the digital radio link.
  • Page 4 AAT, as shown in the picture: 2. The antenna has to be mounted on the Crossbow AAT with the use of a special bracket.In order to prevent tampering with the normal operation of the compass built into the Crossbow AAT it is recommended to avoid using antennas made with ferromagnetic materials.
  • Page 5 3. There is an aviation-socket on the main unit(the upper connector), and a cable with aviation- plug and color coded wires.
  • Page 6 Please connect it to your equipments(DataRadio, VideoRX... etc) using the following color coding diagram: Upper Connector Cable Color Definition Pin# Wiring Color Definition 12V~16V power supply (shared AAT power supply voltage) Yellow Analog video input External GPS RX (U2 RX). This pin maybe not available in later version. Gray The UART2 has been move to the top of the LEFT ARM of Crossbow.
  • Page 7 Power on the digital radio link. Usually, the UAV ground station also needs to be connected to the digital radio link. Sharing the TX line of the digital radio link with Crossbow AAT will not affect the normal ground station operation.
  • Page 8 Lower Left Connector Cable Color Definition PIN# Wiring Color Definition Orange Telemetry Data TX(U3 TX) (connected with RX of your DataRadio) Blue Telemetry Data TX(U3 RX) (connected with TX of your DataRadio) 12V~16V power supply (shared AAT power supply voltage)
  • Page 9 Gray Not Connected Yellow Analog video output Black Ground Lower Right Connector Cable Color Definition (Not RF version) PIN# Wiring Color Definition Orange Not Connected Blue Not Connected Not Connected Gray Not Connected Yellow Analog video output Black Ground There is also a Crossbow RF model which uses a RF-Slipring inside. With this RF version, users can mount their antenna on the tracker and access the signal(Up to 3GHz) with the lower N- Connector of the Crossbow.
  • Page 10 5. Choose the GPS+Compass module to get better tracking performance: The Crossbow will recognize the GPS+Compass module once it's plugged. The screen will display something like GPS:12/L14 to show the number of satellites locked by remote GPS/ local GPS. With this module, The tracker will start to track when it locks enough satellites without setting home operation.
  • Page 11 Once the plane flies to 10 meters away, the tracker will start to track. Crossbow can work in 2 modes: Unlimited/450degrees. In Unlimited mode the Crossbow AAT can rotate in one direction continuously. In 450degrees mode, The tracker will rotate back 360 degrees when it reached its limits (to avoid twisting cables between tracker upper rotating part and the ground devices.
  • Page 12 360+45+45=450degrees. That's why we call it "450degrees mode". 4. Downlink The Crossbow AAT needs a downlink to get the information of the tracking plane. Usually this is the most difficult part to get your system to work. Because you have to merge several devices came from different manufactories.
  • Page 13 If you use a Pixhawk/ArduPilot device, I assume you already connect your DataRadios and they are working well. Now we are going to integrate the MFD Crossbow AAT to your system. The DataRadio device can be mounted to the tracker and rotates together with the tracker. In...
  • Page 14 But if the DataRadio is very heavy or you have some other reasons to keep it on the ground, you have to connect a cable from your antenna to your DataRadio in this case. You need to set FavDir (Favorite Direction) of your flight. The tracker will work in 450 degrees mode to avoid twisting cables.
  • Page 15 MAVLINK_MSG_ID_GPS_RAW_INT MAVLINK_MSG_ID_GLOBAL_POSITION_INT If the Crossbow AAT receives some correct MAVLink data packs (Heartbeat?) but not able to find the above 2 messages, it will display "DLink:1% msg?" to remind you to check if the above 2 messages are sent at 1Hz or a higher frequency.
  • Page 16 GPS: 12 DIST:N/A Alt: N/A AZim: N/A VLink: 0% Dir: 0 To enter/quit the menu system, hold the LEFT button for 2 seconds or longer. You can also choose "Exit" in the menu to quit the menu system. Please use the LEFT button to browse the menu. Use the RIGHT button to enter sub-menu or change values.
  • Page 17 HomePos: UsePreHome H1:D:0 H2:D:0 H3:D:0 H4:D:0 H5:D:0 AutoLoad=N Exit H1~H5 is the Home Positions which you recently have used. H1 is the most recent home position. H5 is the earliest one. The distances between your plane and the H1~H5 stored home positions are displayed in a D:XXXXX formation.
  • Page 18 You can also use "AutoDetect" to measure the proper settings of your setup. Remember to fasten your tracker and clear all objects nearby before doing that. Because the tracker may yaw and pitch to any direction during the procedure. CalPitch: MotorCurr Pit:2000 Yaw:2000...
  • Page 19 57600 38400 19200 9600 4800 1200 Exit Choose a downlink baudrate to match your dataradio setting. FlightInfo: FlightInfo Lon:EAST 0.000000 Lat:NORTH 0.000000 ASL:0m BARO:0m Exit This screen displays some useful information of the plane which is being tracked. Lon/Lat is the GPS coordinates of the plane. ASL: AboveSeaLevel altitude of the plane.
  • Page 20 Valid range of this parameter is [0,100]. VBISetting: VBI Level VER:V1 Exit Choose V1 to work with old MFD products (MFD AP, MFD TeleFlyPro). Choose V2 to work with new MFD products(MFD Crosshair AP, MFD TeleFlyTiny. You can also choose V1 for Crosshair/TeleFlyTiny with their own menu). This is about how to use the analog video to carry flying information.
  • Page 21 PitchTest AllTest CoreData Exit This screen is reserved for the manufacture.
  • Page 22 Appendix A:...
  • Page 24 Crossbow uses [MAVLINK_MSG_ID_GLOBAL_POSITION_INT.relative_alt] field for pitch tracking. When you set menu [Protoco->ALT=GPS], the Crossbow AAT uses [MAVLINK_MSG_ID_GPS_RAW_INT.alt] for pitch tracking. Which specific ALT setting you need to use depends on the behaviour of your AutoPilot. Due to the imperfect world of MAVLink you need to pay more attention about the Altitude information of MAVLink.
  • Page 25 Please connect the update tool to your Crossbow tracker. Insert the USB plug to your windows PC. Install the driver for USB-TTL if necessary: http://www.myflydream.com/inc/lib/download/download.php?DId=30 download the MFD FW & update tool (you need .Net 4.0 framework to use it) http://www.myflydream.com/inc/lib/download/download.php?DId=61 >>>...
  • Page 26 Run MFD_Update.exe. Choose "MFD_AAT". Choose correct COM port of your computer (The specific COM port number depends on your system). Browse for the firmware on your computer by clicking "choose the file". Then click "Update" button. A popup window will appear to ask you to confirm the update. Click "YES". Just wait for a few seconds until the update finishes.