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Television in Germany

    Naturevolume 135page987 (1935) | Download Citation



    A REGULAR television transmission service has already been inaugurated in Berlin by the German Post Office authorities, and arrangements are made whereby the public can attend demonstrations so that they may see for themselves what the new service has to offer. An article describing the proposals for the further development of television in Germany was given in the Wireless World of May 24, as an abstract of a paper by W. Scholz, recently published in Elektrische Nachrichten Technik. The television transmissions are of the 180 line, 25 pictures per second type and are given on ultra-short waves of less than 8 metres. Both sound and vision transmissions take place on these wave-lengths, so that a single heterodyne oscillator may be used at the receiver for both portions of the programme. A total band-width of 2,400 kilocycles per second is allocated to each station for the combined programmes. In the scheme proposed, it is assumed that a minimum field-strength of 1 millivolt per metre has to be provided, and that the transmitters will have aerial powers of from 2 to 20 kilowatts on wave-lengths between 5·7 and 7·5 metres. The lower-power stations will be erected on mountain peaks at heights ranging up to 4,000 ft., and it is estimated that the effective range of these stations will be of the order of 85 miles. On this basis, it is considered that the whole of Germany can be provided with a television service by means of twenty to thirty stations, the wave-lengths being distributed geographically so as to avoid mutual interference.

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