.~ Modification of signal bandwidth, frequency, or circuit impedance at subsurface location
DEFINITION
Classification: 340/855.7
Modification of signal bandwidth, frequency, or circuit impedance at subsurface location:
(under subclass 853.1) Subject matter wherein the information to be transmitted is modulated on a signal and either the signal or circuit frequency characteristics are subsequently modified to optimize transmission between the surface and subsurface communications equipment.
SEE OR SEARCH THIS CLASS, SUBCLASS:
853.7, for a signal-modifying repeater in a wellbore cable or other subsurface link.