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Design of Interrogator Units
The Secondary Radar Transponder
2 other sections not shown
acceptance gate active decoder air space air traffic control aircraft replies altitude amplifier amplitude ATC transponder Block diagram buffer amplifiers cascode channel characteristics circuit code setting coder coincidence common decoder connected control unit defruiter delay line diode diplexer directional antenna echo filter framing pulses frequency ground station ICAO identification IFF transponder AN/APX-46 indicator information pulses input interrogation mode interrogation pulse interrogation signal interrogator unit interval method military mixer MoA-Gilham mode gate modulator monopulse monostable operation oscillator p-i-n diodes parallel video passive decoding position possible primary radar produced pulse power pulse train radar installation radar screen radar unit radiation range response scanning secondary radar system Secondary Surveillance Radar selected shift-register side lobes Side-lobe Suppression specifications SSR ground SSR reply SSR system SSR transponder stage Superheterodyne receiver switch synchronous target transmission transmitter power trigger video signal voltage width