TELEVISION ON ULTRA-SHORT WAVES
Bpeaking at the Crystal Palace, to thre shareholders' meeting in Wardour Street. , '. " -'
The transmission was carried on two ultra-short wave-lengths of 6 and 6.5 metres, carrying vision and speech, respectively. '
The picture is made up of 180 strips or lines,'compared -\vith the thirty lines used for the present 8.8.C. transmissions. This means'an immense improvement in detail —an 'increase in the number of "picture points" from 2000 to 48,000. • . ; '' One of the difficulties in the development of television has been the- enormous wave-length "spread"- demanded by a transmission giving good detail. An ordinary broadcasting station is allowed elbow-room of 9000 cycles, and lif it exceeds this allowance, interference is likely. ■ ' ■■
■ The 180-line television transmission, however, requires a " spread" o£ a million cycles. There is plenty o£ accommodation oh.'the 6-metre wave, but its short range ;and the vagaries of reception, have hitherto been considered obstacles to its use.
The home receiver which the company proposes to market gives a picture lOin by Sin. One of the secrets of its success is improved aerial arrangements. . . ■ .-. . .. :■
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Bibliographic details
Evening Post, Volume CXVII, Issue 109, 10 May 1934, Page 19
Word Count
176TELEVISION ON ULTRA-SHORT WAVES Evening Post, Volume CXVII, Issue 109, 10 May 1934, Page 19
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