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5.2 Production testing
5.2.1
u-blox in-series production test
u-blox focuses on high quality for its products. All units produced are automatically tested in all the
interfaces along the production line. A stringent quality control process has been implemented in the
production line. Defective units are analyzed in detail to improve production quality.
This is achieved with automatic test equipment (ATE) implemented in the production line, logging all
production and measurement data. A detailed test report for each unit can be generated from the
system.
Figure 64
illustrates the typical 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 supported bands (such as frequency tuning,
calibration of transmitter and receiver power levels, etc.)
•
Verification of RF characteristics after calibration (such as modulation, power levels, spectrum,
etc. are checked to ensure they are all within tolerances when calibration parameters are applied)
Figure 77: Automatic test equipment for module tests
5.2.2
Production test parameters for OEM manufacturers
Because of the testing performed by u-blox (with 100% coverage), an OEM manufacturer does not
need to repeat firmware tests or measurements of the module RF performance or tests over analog
and digital interfaces in their production test.
An OEM manufacturer should focus on:
•
Module assembly on the device; it should be verified that:
Soldering and handling processes did not damage the module components
o
All module pins are well soldered on the device board
o
There are no short circuits between pins
o
•
Component assembly on the device; it should be verified that:
Communications with host controller can be established
o
The interfaces between the module and device are working
o
The RF interfaces of the device, including antennas, are working
o
Dedicated tests can be implemented to check the device. For example, the consumption measured in
a specified status can detect a short circuit if compared with a "Golden Device" result.
UBX-22015376 - R02
C1-Public
LENA-R8 series - System integration manual
Product testing
Page 110 of 116
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