u-blox SARA-R4 Series System Integration Manual

Contents

SARA-R4 series - System Integration ManualUBX-16029218 - R06 Product testingPage 88 of 1025 Product testing5.1 u-blox in-series production testu-blox focuses on high quality for its products. All units produced are fully tested automatically in productionline. Stringent quality control process has been implemented in the production line. Defective units are analyzedin detail to improve the production quality.This is achieved with automatic test equipment (ATE) in production line, which logs all production andmeasurement data. A detailed test report for each unit can be generated from the system. Figure 44 illustratestypical automatic test equipment (ATE) in a production line.The following typical tests are among the production tests. Digital self-test (firmware download, Flash firmware verification, IMEI programming) Measurement of voltages and currents Adjustment of ADC measurement interfaces Functional tests (serial interface communication, SIM card communication) Digital tests (GPIOs and other interfaces) Measurement and calibration of RF characteristics in all supported bands (such as receiver S/N verification,frequency tuning of reference clock, calibration of transmitter and receiver power levels, etc.) Verification of RF characteristics after calibration (i.e. modulation accuracy, power levels, spectrum, etc. arechecked to ensure they are all within tolerances when calibration parameters are applied)Figure 44: Automatic test equipment for module tests