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LDM #392: Thales Optronics GPS North Finding Module - Part 1: Teardown
0:00 Introduction: The video showcases a Thales Optronics GPS North Finding module (GNAV IMU - Inertial Measurement Unit) acquired from eBay UK for approximately 300 pounds.
0:14 Physical Description: The unit is heavy (about 10 kg) and was manufactured in 2012 by Thales Optronics Ltd. in England. It's designed for aircraft, indicated by Instro markings, has three GPS antennas, a connector, and many screws.
1:11 Opening the Unit: Opening the device reveals three GPS modules, the bottom side of the mainboard, and two angular rate gyros.
2:36 Fiber Optic Gyro Discovery: A fiber optic gyro is identified by its shape.
2:53 Russian Gyro Surprise: A Russian-made gyro (Fizoptika VG910F) is unexpectedly found within the military-grade device.
3:56 Main Board Overview: The mainboard features a DC input, fuse, potential TVS diode, manually replaced transistor, DC power supply with two DC-DC converters and a buck converter, a DSP (TMS320), an FPGA (Xilinx Spartan), two flash memories, and X-ray tested solderings.
5:04 Missing Parts: Some parts are not populated on the PCB.
6:18 GPS Module: The GPS module and one of its antennas are shown.
7:00 IMU Components: The IMU includes three angular rate gyros (two less accurate, one fiber optic for higher accuracy) and three accelerometers (Silicon Sensing).
7:49 IMU Interface Board: The bottom side features an interface board with several Burr Brown ADCs.