Patent ID: 6369467
Filing Date: 2002-04-09
Classification: H04B

Abstract:
A hot stand-by switching apparatus which comprises:a first transmitting means including a first modulator connected to a first switch for turning on and off the output from said first modulator, and a first transmitter connected to said first switch for amplifying the output from said first switch; a second transmitting means including a second modulator connected to a second switch for turning on and off the output from said second modulator, and a second transmitter connected to said second switch for amplifying the output from said second switch; a distributor connected to said first modulator and second modulator for distributing an input signal to said first and second modulators; and a controller connected to said first and second modulators, said first and second transmitters and said first and second switches, which selects either said first transmitter or said second transmitter, wherein said controller selects said second transmitter by switching off said first switch, when said first transmitting means malfunctions, while said controller selects said first transmitter by switching off said second switch, when said second transmitting means malfunctions.