| 摘要 |
<p>It is proposed to distribute signals on frequencies above the UHF television frequency band, in this case above 860 MHz, in an exponentially modulated form for the expansion of the signal distribution capacity of a cable television network, in particular a cable television network composed of coaxial cable (9a-e, 10a-c, 11a-b). It is specifically proposed to distribute television signals in frequency modulated form (FM) in the 950-2050 MHz frequency band. By means of frequency split band techniques, the exponentially modulated signals are amplified separately from the other signals in the cable television network. For this purpose amplifiers (23, 24) comprising filter means are provided, which can be installed in combination with the existing amplifiers (12, 14, 15) in the cable television network. Adaptation of, or modifications to the underground cable network are not necessary. The exponentially modulated television signals received at a subscriber terminal or group of terminals (7, 8) may be converted if desired to the baseband and/or, in amplitude modulated form (AM), to the conventional VHF and UHF television frequency bands. <IMAGE></p> |
