.~ Repeater in subsurface link (e.g., cable, etc.)
DEFINITION
Classification: 340/853.7
Repeater in subsurface link (e.g., cable, etc.):
(under subclass 853.1) Subject matter having a device which receives and retransmits the signals at an intermediate position between the subsurface equipment and cooperating surface communications equipment, and which is separated from both the surface and subsurface equipment by a significant portion of the subsurface transmission link.
(1) Note. The term "significant portion" excludes devices with a repeater or amplifier on the surface or attached to the sonde housing.
(2) Note. The retransmission is usually to strengthen or modify the signal being transmitted.
(3) Note. Although systems including relays are in this subclass, the term relay is also used to designate a passive inductive or transformer device which is classified elsewhere.
SEE OR SEARCH THIS CLASS, SUBCLASS:
425.1+, for a repeater in an unspecified-type communications system.
SEE OR SEARCH CLASS
370, Multiplex Communications, 274, 279, 293, 315+, 492, and 501+ for a multiplex repeater of a specific type.
375, Pulse or Digital Communications,
211+, for a pulse or repeater in a digital communications device not limited to wellbore telemetering.
