BROADCAST RECEIVER

摘要

PURPOSE: To enable an alarm center to confirm by itself whether or not there is disturbance in a transmission section for alarm broadcasting to a receiver by connecting one side of a delay line to the output side of a control signal generator and the output side to the input side of a release circuit for alarm broadcasting. CONSTITUTION: The delay line 9 generates a travel time required for a control signal to reach an antenna socket 13 and the output side of a decoder 5 of a receiver through the transmission section from the output side 11 of a control signal generator 10 to the studio of a transmitting station 3 and the antenna system 12 of the broadcasting station 3. The output side 14 of a coincidence circuit 6 is connected to a release circuit 15 for an actual alarm generator and the transmission of this alarm generator is performed in respective basic bands of connected transmitting stations after transmission release. The output sides 14 and 14' of respective coincidence circuits 6 are connected to the release circuit 15 through an AND circuit 16 and then an alarm broadcast is transmitted for the 1st time when the whole transmission section is established.