What bandwidth do you want to achieve? I took the csv dump of the bode plot data, and looked for maximum gain. Place the first cursor line on the starting of the sine wave and the second cursor on the ending of the sine wave as shown below to measure the period of the frequency. jorgelestro liked Remarkably Accurate Quartz Clock. Could a subterranean river or aquifer generate enough continuous momentum to power a waterwheel for the purpose of producing electricity? Are all my crystals bad somehow? Physics Stack Exchange is a question and answer site for active researchers, academics and students of physics. What does "up to" mean in "is first up to launch"? What were the most popular text editors for MS-DOS in the 1980s? Frequency - Monitoring and measuring a.c. - BBC Bitesize It is interesting that because of the resonance of the crystal, the voltage on the scope can be much higher than the input voltage from the signal generator. When looking at lower frequency quartz with high impedance, the resonance is clearly visible. But the above circuit is much more universal. This cookie is set by GDPR Cookie Consent plugin. Instead I am seeing nearly the same wave amplitude at all frequencies. That link is not a crystal test fixture. How Can I Measure Speaker Impedance & Resonance - All About Circuits This cookie is set by GDPR Cookie Consent plugin. These measurements were made on a filter that responds to a voltage stimulus. You can also see my unknown torrid core inductor here. Chat with Sales The input signal is shown in trace C1 in the upper left corner. Now try increasing the frequency of the PWM signal, if you do not have a waveform generator then try decreasing the value of the capacitor until you notice the resonance frequency. A minor scale definition: am I missing something? You say you have an oscilloscope. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. If you want to ensure accuracy when taking a frequency measurement, it helps to increase the signal area on your oscilloscope display making it bigger so you can more easily translate the waveform. on top of the bloody red arrow. 31. The National Institute of Standards and Technology measured gas flows exiting large, unthermostated, gas-filled, pressure vessels by tracking the time-dependent pressure P(t) and resonance frequency f N (t) of an acoustic mode N of the gas remaining in each vessel.
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