Crystal oscillators are loosely divided from the frequency they get the job done at and whether they are fundamental oscillators—operate in the frequency marked over the can or at even multiples of that (overtone oscillators). As it is possible to see from your graph beneath, crystals have two resonant details. https://socialdosa.com/story8782449/how-much-you-need-to-expect-you-ll-pay-for-a-good-bulk-crystal-oscillator