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<http://webisa.webdatacommons.org/71889568>	<http://www.w3.org/ns/prov#value>	"Even when crystal accuracy is enhanced in a digital compensated crystal oscillator (DCXO), the undesired offset may still be substantial due to factors such as crystal aging, factory calibration inaccuracy and temperature variation." .
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<http://webisa.webdatacommons.org/71889568>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .