| 摘要 |
1. A device for evaluating received signals in audio-frequency powder-control receivers, comprising an input filter tuned to the audio frequency and a following amplitude detector which records overshooting of threshold values by the filter output signal amplitude, where the received signal consists of a pulse telegram the individual pulses of which each occur only within time windows predetermined by a time raster, where the output signal of the amplitude detector is checked in an analysis circuit and where an individual pulse is recorded only when the following conditions are fulfilled : a) instances of threshold value overshooting occur within a minimum pulse length, b) no pause occurs within a minimum pulse length which exceeds a predetermined time duration between two instances of threshold value over shooting following the first threshold value over shooting, characterized in that an individual pulse is recorded only if the time sum of the instances of threshold value overshooting within the time window lies between a minimum pulse length and a minimum pulse length. |
