用于节目传输的长途电缆电路的简化

A. B. Clark, C. Green
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引用次数: 0

摘要

这个国家电话有线网络的迅速发展,使人们希望开发一种系统,使该网络能够在2000英里以上的距离上传输广播电台的节目。这种系统最近已经开发出来,并在2200英里长的环路上进行了试验,结果非常令人满意。它传输的频率和音量范围,比现在用于节目工作的开线电路所能处理的范围要大一些,而且在没有长途线路的情况下,也比现在的无线电广播系统所能处理的范围要大一些。本文首先讨论了广播系统的传输要求,然后对这种新型有线电视系统进行了描述。
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Abridgment of long distance cable circuit for program transmission
The rapid growth of the telephone cable network in this country has made it desirable to develop a system whereby this network may be utilized to transmit programs for broadcasting stations over distances upwards of 2000 mi. Such a system has recently been developed and given a trial with very satisfactory results on a looped-back circuit 2200 mi. long. It transmits ranges of frequency and volume somewhat in excess of those now handled by the open-wire circuits which are used for program work, and also in excess of those handled by present-day radio broadcasting systems when no long distance lines are involved. The paper deals first with the transmission requirements of broadcasting systems and then gives a description of this new cable system.
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