与数字电视信号分离的频率标准的频率稳定性

TELSIKS 2005 - 2005 uth International Conference on Telecommunication in ModernSatellite, Cable and Broadcasting Services Pub Date : 2005-09-28 DOI:10.1109/TELSKS.2005.1572187

M. T. Pesic, D. Radenkovic, M. Arsić

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摘要

本文测量并给出了视频信号数字化对其频率稳定性的影响。视频信号首先在电视演播室进行数字化处理，然后通过微波链路转发到电视发射机，在发射机中将其转换成模拟信号，最后向广大地区广播。电视线路频率与接收到的电视信号精确分离，然后在锁相环中乘以1 MHz/TTL，这是非常方便用作频率标准的方法。再生的1 MHz/TTL频率标准适用于进一步的比较和应用。其频率稳定性由PC机控制的HP5390A频率稳定分析仪测量

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Frequency Stability of the Frequency Standard Separated from the Digitized TV Signal

The influence of the video signal's digitization on its frequency stability is measured and presented in this paper. The video signal is firstly digitized in the TV studio and then relayed through the microwave link to the TV transmitter where it is converted to the analog form, and finally broadcast to a wide area. The TV line frequency, which is very convenient to be used as a frequency standard, is precisely separated from the received TV signal and then multiplied to 1 MHz/TTL in a PLL. The regenerated 1 MHz/TTL frequency standard is suitable for further comparisons and applications. Its frequency stability is measured by the HP5390A frequency stability analyzer, controlled by the PC

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TELSIKS 2005 - 2005 uth International Conference on Telecommunication in ModernSatellite, Cable and Broadcasting Services

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