Automatic-tuning method and automatic-tuning system

An automatic-tuning method for testing an object located at at least one coordinate point, the automatic-tuning method comprising:

• performing a parameter obtaining step comprising configuring a processor to obtain a first data rate and a first signal quality index of the object located at one of the at least one coordinate point;
• performing an inflection point finding step comprising configuring the processor to control an attenuator to change a total path loss of the object according to the first data rate and the first signal quality index so as to obtain at least one second signal quality index and at least one second data rate, determine whether to update a signal quality reference value and a coordinate reference value according to the at least one second signal quality index and the at least one second data rate, and if so, update the signal quality reference value with one of the at least one second signal quality index and the coordinate reference value with the one of the at least one coordinate point;
• and
• performing a signal quality confirmation step comprising configuring the processor to confirm whether the signal quality reference value is less than or equal to a preset signal quality threshold to generate a signal quality confirmation result and determine whether to output the signal quality reference value and the coordinate reference value according to the signal quality confirmation result.