LEXI-R422 - System integration manual
UBX-23007449 - R02
Product testing
Page 100 of 108
C1-Public
5.2
Production testing
5.2.1
u-blox in-line production tests
u-blox focuses on high quality for its products. All units produced are tested automatically in all their
interfaces along the production line. Stringent quality control processes have been implemented in
the production line. Defective units are analyzed in detail to improve production quality.
This is achieved with automatic test equipment (ATE) in the production line, which logs all production
and measurement data. A detailed test report for each unit can be generated from the system. The
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 all supported bands (such as receiver S/N
verification, frequency tuning of the reference clock, calibration of transmitter and receiver power
levels, etc.)
•
Verification of the RF characteristics after calibration (i.e. modulation, power levels, spectrum, etc.
are checked to ensure they are all within tolerances when calibration parameters are applied)
Figure 66: Automatic test equipment for module tests
5.2.2
Production test parameters for OEM manufacturers
Because of the testing done by u-blox (with 100% coverage), an OEM manufacturer does not need to
repeat the firmware tests or measurements of the module RF performance or tests over analog and
digital interfaces in their production test.
However, an OEM manufacturer should focus on:
•
Module assembly on the device; it should be verified that:
o
The soldering and handling process 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
•
Component assembly on the device; it should be verified that:
o
Communication with the host controller can be established
o
The interfaces between the module and device are working
o
The RF interfaces of the device including the antennas are working
Dedicated tests can be implemented to check the device. For example, the consumption measured in
a specified status can help
detect a short circuit if compared with a “Golden Device” result.
