Abstract: A radar equipment comprising a display unit (FIG. 1) and a scanning unit (FIG. 2) linked together by electrical conductors (94,72,106,26) for the transmission of information and/or control signals between the units, and circuitry (90,98; 66,69; 102,108; and 25,162, respectively) for superimposing on an individual conductor more than one of the signals.

Abstract: A power supply apparatus for a radar system of the type which has a control box including signal processing means and a source of electrical power, an antenna unit remote from the control box and including an antenna, a transmitter, a receiver and an IF amplifier, and a coupling cable of variable length between the control box and the antenna unit, the coupling cable coupling signals to and from the antenna unit as well as a power supply voltage and a tuning control voltage. The power supply apparatus comprises a switching mode power supply circuit having an input supplied with the power supply voltage and an output for providing a substantially stable output supply voltage for the receiver. A feedback circuit is responsive to the output supply voltage and is coupled to a control input of the switching mode power supply circuit for adjusting the operation of that circuit so as to maintain the output supply voltage substantially stable.