Meaning
Factory calibration and diagnostic routines executed on fully assembled units verify the functional integrity and radio frequency performance of each device before packaging. Integrating a production end of line test allows the assembly plant to catch assembly defects like loose cables or bad solder joints. This measurement ensures that only fully functional units are sent to the warehouse.
RF Measurements
Automated test equipment measures output power, frequency accuracy, and receiver sensitivity across the supported wireless bands. During the production end of line test, the device is placed in a shielded chamber to prevent external signals from affecting the measurements. This step ensures that the wireless transmitter complies with the certified specifications.
Failure Isolation
Fast diagnostic routines run when a unit does not meet the performance limits to find the cause of the failure. If a unit fails the production end of line test, it is automatically routed to the rework station for analysis. This routing keeps the assembly line moving without stopping the production run.
This isolation prevents bad units from being packaged and shipped, reducing returns from the field.
Calibration Action
Final firmware settings and calibration data are saved to the device’s non-volatile memory during this test. A successful production end of line test triggers the printing of the unique product label and the packaging of the device. This process guarantees that every shipped unit meets the required performance and quality standards.
