A superheterodine receiver for telegraph with frequency displacement, that comprises automatic correction of frequency. (Machine-translation by Google Translate, not legally binding)

摘要

Superheterodyne receiver for telegraphy with frequency offset comprising a local oscillator and a frequency corrector that must be controlled by an automatic frequency control voltage (acf voltage) to automatically bring the tuning frequency of the receiver to match the frequencies of transmission of the telegraphy signals, the voltage caf of a tuned frequency detector being derived in whose output circuit the demodulated signals are produced, characterized in that the demodulated signals control a relay provided with a rest contact included in the conductor caf voltage being conditioned said relay to respond with delay so it does not respond to the normal signaling frequency while the frequency corrector is of the type devoid of a readjustment force and thus retains the position of adjustment that accidentally exists in the instant of the interruption n caf driver voltage. (Machine-translation by Google Translate, not legally binding)