About: http://webisa.webdatacommons.org/309455071

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	The input was modulated so there was an ac signal at the crystal which then passed through an amplifier and lock-in detector.
http://www.w3.org/ns/prov#wasQuotedFrom	stanford.edu