Abstract: A relative clock time display device includes a control unit that accepts setting of time that is referred to as a relative time, which is different from an actual time and in a relative relationship with the actual time, performs timing on a basis of the relative time accepted by the control unit, specifies a current clock time, which is referred to as a relative clock time, in the relative time on a basis of the timing performed by the control unit, and displays, on a display unit, an image or video according to the relative clock time specified by the control unit.

Abstract: A returned reference compatible straightaway envelope delay measuring instrument and a related method use a sinewave generator to produce an envelope and a low frequency reference oscillator for modulating amplitude of the envelope. The low frequency modulated envelope signal is transmitted over a transmission path to an envelope detector, which detects the envelope. A phase detector connected to the envelope detector and to a local similar low frequency reference oscillator detects phase difference between the low frequency modulating oscillation in the envelope and a local reference oscillator signal. A processor makes a series of delay measurements and computes the delay difference between the start delay measurement and the end delay measurement.

Abstract: Programmable or fixed delay response shape bulk delay extender circuit for a line conditioner or equalizer system having a cascade set of all pass sections for processing signals in which said sections introduce for different frequencies a delay of said signals, and programming apparatus for selectively neutralizing such delay introduced therein by one or more of the all pass sections to produce various delay response shapes or to effect a complete bypass of the bulk delay extender.The programming apparatus is a multi-position rotary switch having both indication mechanism and controlling mechanism selectively neutralizing delay introduced by one or more of the all pass sections to produce various delay response shapes or effecting a complete bypass of the bulk delay extender.