In this video, I walk you through how to precisely tune and calibrate a 10MHz OCXO (Oven Controlled Crystal Oscillator) using a GPS module as a reference signal. You’ll also see how to compare the OCXO’s output with a GPS reference signal on an oscilloscope, how jitter can affect your calibration. I also show how to inject 10MHz into Si5351, to generate other frequencies like 50MHz or 100MHz, all synced to the GPS signal. Lastly, I give a sneak peek into how my DIY GPSDO (GPS Disciplined Oscillator) works, explaining the phase-lock loop (PLL) works. Whether you’re an electronics enthusiast, a DIYer, or someone looking to improve their frequency accuracy, this video will provide you with the tips and techniques you need to calibrate oscillators with professional-level precision. 🛠️ Topics Covered: How to build a simple circuit to power and tune an OCXO Using a GPS module to calibrate a 10MHz oscillator Injecting a 10MHz reference signal into a clock module Basics of GPSDO and phase-lock loop (PLL) synchronization Oscilloscope tricks for frequency calibration 🔗 Links: OCXO 143-141 10Mhz (what I used): OCXO with PCB (all already soldered) GPS UBLOX (7M used) The one I used is the video no longer sold, this should work: Antenna to boost signal: Si5351 I2C Clock Generator: ESP8266: SSD1306 OLED I2C Display: If you found this video helpful or learned something new, don’t forget to like, comment, and subscribe for more in-depth tutorials!