Mobile terminal calibration method

Abstract

The invention relates to a mobile terminal calibration method which is used for AGC (automatic gain control) calibration and APC (automatic power control) calibration of a mobile terminal. The method includes: controlling a comprehensive test instrument and the mobile terminal to be synchronous through a console; after synchronization is completed, sending a first communication signal by means of a series of designated APC control words and a series of frequency points at a first designated time slot on the mobile terminal according to setup of the console; measuring signal intensity of a second received communication signal by means of a series of designated AGC control words and a series of frequency points at a second designated time slot; synchronously measuring the power of the second communication signal of multiple power levels at the second designated time slot and frequency points on the instrument according to setup of the console and measuring the power of the first communication signal sent to the mobile terminal at the first designated time slot and frequency points; and calculating and judging on the console according to measurement values fed back by the instrument and the mobile terminal and outputting final results to the mobile terminal for storage.

Description

Technical field [0001] The present invention relates to calibration in the production process of mobile terminals, especially automatic gain control (AGC) calibration and automatic power control (APC) calibration. Background technique [0002] Mobile terminals, such as mobile phones, need to undergo downlink signal calibration and uplink signal calibration before leaving the factory. The downlink signal calibration is automatic gain control (AGC) calibration, and the uplink signal calibration is automatic power control (APC) calibration. In terms of AGC calibration, the signal received by the radio frequency receiver has a large power range. Through the adjustment of the AGC voltage, the amplitude of the baseband signal before sampling can be maintained in a constant range. The calibration of the AGC voltage is to measure the corresponding relationship between the control voltage and the received signal power, and write this corresponding relationship into the storage medium. S...

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned existing production calibration process can be called a single-step point-by-point calibration method. This method requires command interaction between the computer and the mobile terminal for calibration at each frequency point, resulting in command interaction between the computer and the mobile terminal. Very frequently, command interaction time has become a bottleneck to improve calibration efficiency

In order to improve the efficiency of production calibration, in the existing production calibration technology, only the method of reducing the number of calibration points can be used, but this method will sacrifice part of the calibration accuracy

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