About: http://webisa.webdatacommons.org/264110511

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	It is customary to use a quadrature circuit to demodulate an SIF signal, which is an FM signal, especially when the SIF signal is demodulated at a high frequency such as 4.5 MHz.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com