(under the class definition) Systems including an auxiliary line so structurally related to a transmission line that a change in the transmission line characteristics caused by a change in an ambient condition, such as temperature or humidity, will be accompanied by a change in a parameter of the auxiliary line, and means controlled by this change in parameter to compensate for the change in transmission line characteristics.
SEE OR SEARCH THIS CLASS, SUBCLASS:
2+, for plural channel systems including a pilot line.
16, for systems utilizing a pilot current for purposes of control.
SEE OR SEARCH CLASS
323, Electricity: Power Supply or Regulation Systems,
294, for impedance systems in general which are automatically controlled in response to a thermal condition. 330, Amplifiers,
52, for amplifier systems having control means, wherein the
control is exercised by a pilot signal. See the Class Definition of Class 330 for the line between this class (333) and Class 330 where pilot signals are involved.
379, Telephonic Communications,
338+, for repeater systems (e.g. two way amplifier system) which utilize a pilot line to compensate for changes in the transmission characteristics of the main line.