SF11 Laser altimeter Product manual The definitive laser altimeter for fixed wing or multi- rotor aircraft. Ideal for automated landings, precision hovering and terrain following. Features: Very compact and lightweight - 35 grams Accurate AGL altitude measurements on ground, foliage and water Fast update rate of 20 rps for the SF11/C, and 40 rps for the SF11/B Includes serial, I2C, USB and analog interfaces with programmable capabilities Easy to congure using the built-in menu and LightWare Terminal software Fully calibrated and ready to run Compatible with Pixhawk, APM and other ight controllers Accurate, reliable altitude measurements in sunlight or dark conditions Not affected by: speed wind changes in barometric pressure noise ambient light terrain or air temperature. SF11 Laser altimeter - Product manual - Revision 8 1 of 20 LightWare Optoelectronics (Pty) Ltd, 2018 www.lightware.co.za SF11 Laser altimeter Product manual Table of contents Product ordering codes .....................................................................................................................................2 1. Overview ..................................................................................................................................................3 2. Specifications of the SF11 ..............................................................................................................................4 3. Quick start guide ........................................................................................................................................5 1. Making connections to the SF11 .......................................................................................................................6 5. Menu options ............................................................................................................................................9 6. Instructions for safe use ..............................................................................................................................15 Appendix A :: Dimensions .................................................................................................................................16 Appendix B :: Main cable type 1, 35 cm ................................................................................................................16 Appendix C :: Connecting to Pixhawk Autopilot using serial 4 ....................................................................................17 Appendix D :: Electromagnetic interference (EMI) graphs ...........................................................................................17 Appendix E :: Command set ...............................................................................................................................19 Revision history .............................................................................................................................................20 Table of figures Figure 1 :: The main features of the SF11 ................................................................................................................3 Figure 2 :: Power from the USB port .....................................................................................................................6 Figure 3 :: Regulated +5 V DC power supply connections ..............................................................................................6 Figure 4 :: LightWare Terminal showing running mode ................................................................................................6 Figure 5 :: USB communications ...........................................................................................................................6 Figure 6 :: Analog voltage connections ...................................................................................................................7 Figure 7 :: Serial interface connections ..................................................................................................................7 Figure 8 :: I2C interface connections .....................................................................................................................8 Figure 9 :: LightWare Terminal showing menu options expanded ....................................................................................9 Figure 10 :: Altitude represented by distance (Serial / I2C) and analog voltage .................................................................11 Figure 11 :: Alarm settings ................................................................................................................................12 Figure 12 :: Median Filter Response graph .............................................................................................................14 Figure 13 :: Labelling on the SF11 ........................................................................................................................15 Figure 14 :: Dimension drawings of the SF11 ...........................................................................................................16 Product ordering codes Model family Model name Model description SF11 SF11/B (50 m) Laser altimeter, max 50 m SF11 SF11/C (120 m) Laser altimeter, max 120 m Disclaimer Information found in this document is used entirely at the readers own risk and whilst every effort has been made to ensure its validity neither LightWare Optoelectronics (Pty) Ltd nor its representatives make any warranties with respect the accuracy of the information contained herein. SF11 Laser altimeter - Product manual - Revision 8 2 of 20 LightWare Optoelectronics (Pty) Ltd, 2018 www.lightware.co.za