Crystals earlier mentioned thirty MHz (approximately >two hundred MHz) are normally operated at sequence resonance in which the impedance appears at its minimal and equal towards the series resistance. For these crystals the series resistance is specified ( SMD crystals include exceptionally minor phase sounds, which results in minimal jitter https://bookmarksusa.com/story19034549/the-fact-about-smd-crystal-oscillators-that-no-one-is-suggesting