This system works on UHF frequency brand, use PLL circuit. There are 256 frequencies for your option.

本机工作在UHF频率，采用PLL锁相环电路，预设256个可选择使用频率。

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The paper details the RTCC, OPTION register, prescaler and sync delay circuit principle and design feature.

文章详细讨论了RTCC、OPTION寄存器、预定标器及同步延时单元的电路结构、工作原理及设计特点。

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Summary: First of all, the program argues that the design of appropriate programs, there are two options, the program I: Series DC Power Supply, Option II: Integrated circuit voltage regulator.

内容摘要：首先进行方案论证，设计合适的方案，有两种方案可供选择，方案一：串联式直流稳压电源，方案二：集成稳压电路。

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Many of the big retailers with websites, such as Circuit City and Sears, offer the option of picking up the goods in their shops.

ECONOMIST: Retailers are the top performers online