# 2020/03/10 ---- ## Quality Factor ---- ### Blogs from Zurich - [Setting up a Digitally Tunable Resonator using the HF2LI](https://blogs.zhinst.com/andreas/setting-up-a-digitally-tunable-resonator-using-the-hf2li/) - Maximal Q-Factor is about 730e9 @ 50MHz, about 15e6 at 1kHz. Limited by maximum integration time constant of 583s - Minimal Q-Factor is about 10, physically limited due to the need of omega / two omega suppression - change BW/Order of LPF ---- ### Blogs from Zurich - [Ring-Down Method for Rapid Determination of High Q-factor Resonators](https://blogs.zhinst.com/romain/ring-down-high-q/) - Pulse - DAQ(Trigger) mode - TC for demodulators are set to be 1(ms), aiming not to measure the time-delay of HF2LI itself (4 ms). ---- ### Other Applications - For papers about mechanical resonators or gyroscopes, quality factors are typically from 20,000 to 80,000. - HF2LI is only used to extract Q. --- ## DLTS ---- ### Questions  --- ## Future Work - Having recognized the basic part of DLTS, I'll try to convert equations to codes.