| 摘要 |
PCT No. PCT/EP92/01041 Sec. 371 Date Jul. 12, 1994 Sec. 102(e) Date Jul. 12, 1994 PCT Filed Dec. 5, 1992 PCT Pub. No. WO93/23951 PCT Pub. Date Nov. 25, 1993.Wired into the transmission path (2) of a transmission arrangement (1) to transmit a useful signal (NS), especially an audio or data signal, that is modulated onto a carrier signal (TS), is a bandpass filter (5) whose filter quality (G) can be adjusted. An error signal circuit (9) connected to the transmission path on the output side of the bandpass filter detects missing or excessively low amplitudes of the carrier signal and produces therefrom an error frequency signal (FS) with which, by means of a characteristic curve (G=f(FS)), the quality of the bandpass filter (5) is set and thereby the bandpass filter (5) is switched, in the manner of a cross-fade, from a wide transmission bandwidth to a high voltage superelevation in order to regenerate the amplitude of the carrier signal.
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