Method of sensing descrete operational states

Abstract

A method of sensing the desvcrete operational states of a device that is remote from a direct current power supply in which the desrete operational states have different levels of electrical power for use in a remotely mountable weatherproof bi-directional, half-duplex switching amplifier system designed to provide maximum range for low power half-duplex radios such as Spread Spectrum radio transceivers and in which the current being drawn by the device flows through a series connected resistor and in which the voltage drop across the resistor is sensed.

1 - 32 . (canceled)  
   
   
       33 . A method of sensing the discrete operational states of a device remote from a direct current power supply powering said device, said discrete operational states each using different levels of electrical power, comprising: 
 putting the current being drawn by said device through a series connected resistor,    sensing the voltage drop across said resistor by a differential voltage comparator, and    optically outputting the results of said comparator, said output indicating one of said discrete operational states of said device.