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1·Using 8253 and 8255 sent out the sound with fixed frequency.

并利用8253定时器和8255可编程控制器发出了指定频率的声音。

2·With fixed frequency control circuit, it provides with over voltage, over current, overheat and short circuit protection.

该系列电源适配器，采用固定频率控制电路，具备限流、限压、过温、短路全功能保护。

3·But Steady low fan speed change, so that airflow and vibration according to a fixed frequency, so we might as natural wind moderate.

但稳定低风扇速度变化，使气流和振动按固定频率，因此我们可能是自然风温和。

4·With the drastic frequency competition of communication, the usual communications with fixed frequency suffer from a serious threat.

随着通信领域的频率竞争愈演愈烈，惯用的定频通信受到了严重威胁。

5·The fixed frequency sample PWM method is put forward in this paper together with the theoretical analysis about their switch strategy.

本文提出恒频采样电流跟踪型PWM方式，并对其开关策略进行了理论分析。

6·The virtual signal generator has 12-channels outputs for linear scanning frequency signal or fixed frequency sine wave excitation signal.

该发生器可以输出相位差可调的12通道线性扫频正弦激励信号或者输出12通道定频正弦激励信号。

7·This approach the problem of conquers phase excursion and frequency drift that anciently adopts fixed frequency filter and its frame is simple.

这种方法克服了以往采用固定频率滤波器带来的相移和频率漂移问题，而且结构简单。

8·Through adding varactors, a new structure is introduced and it realizes controllable wave-beam of fixed frequency which is better for practical use.

文章提出一种新型结构，通过加入变容二极管，实现了在固定频点上波束可控，更适于实际应用。

9·The transmitting rate of the system varies in period for the fixed frequency lying in the pass band when the thickness of media continuously increases.

对于通带中的固定频率，透射率随介质厚度的增加呈周期性变化。

10·Through a new feeding construction with phase-shifter, the main lobe of the pattern of the microstrip leaky-wave antenna can scan at a fixed frequency.

通过控制微带漏波天线中部馈电端口移相器，成功实现了工作频率固定下微带漏波天线主波束扫描，并使用电子开关实现微带漏波天线主波束双向扫描。