| 摘要 |
FIELD: electric and radio communication, wire, radio, radio relay and meteor communication lines with backward channel or without it. SUBSTANCE: facility to receive start-stop messages has receiver, frequency discriminator, signal selection and synchronization unit, clock pulse oscillator, decision-making unit, first and second keys, storage, squarer, storage circuit, gated threshold unit, pulse counter and scaling unit. EFFECT: diminished probability of false operations. 2 dwg |
