I believe that some users will have some difficult to deal with when using quartz crystal oscillators. Every time, of course, they will find the supplier to deal with. Although the crystal and oscillator sometimes have different problems due to matching or improper operation. In order to solve the daily "question and miscellaneous problems" of a wide range of users, the steps and methods for handling are given and the treatment is organized and shared with you. The main purpose of this article is to show you four solutions to deal with crystal defects and defects.

    What should I do if the crystal does not oscillate when mounted on the PCB?

    Step 1: Please use an oscilloscope or frequency counter to measure the signal from the two terminals of the British crystal oscillator. Please follow steps 9-1 to 9-4 to abort the test. When Xin has a signal output but its waveform amplitude is small, please follow steps 1 to 5 to abort the test.

    Step 2: Please unload the crystal and test its frequency and load capacitance to use a professional testing machine to see if they can vibrate and meet your specifications. You can also send it to your supplier for them to test it for you.

    Step 3: Assuming any of the following situations occurs, for example, the crystal does not vibrate, the load capacitance does not meet your specifications, or there is a huge gap between the current frequency and the target frequency, please send the crystal to the supplier to stop the quality analysis.

    Step 4: Assuming that the frequency and load capacitance meet your specifications and the quartz crystal has passed the DLD test, we need to stop the equivalent circuit test.

    Step 5: Assuming that the crystal has not passed the DLD test, please send it to your supplier to stop the quality analysis for further improvement.