About: http://webisa.webdatacommons.org/14679068

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 ??/4 phase shifter 81 d shifts the phase of the carrier wave of the RZ-DQPSK signal by ?????/4??? (or ??/4+2n??, where n is an integer).
http://www.w3.org/ns/prov#wasQuotedFrom	google.com