The low phase noise and fast frequency switch lock time are the most important target of FH frequency synthesizer.
跳频通信是通信抗干扰的重要措施,跳频频率源是实现跳频通信的核心部件之一,低相位噪声和快速的频率转换锁定时间是跳频频率源的主要指标。
This paper analyses and simulates the lock time of the PLL frequency synthesizer,and gives the solution for various approaches to frequency-switching.
文章对锁相环频率合成器的锁定时间进行了分析与仿真,介绍了各种途径频率转换快速锁定的解决方案,采用其中的基于DDS分数分频的锁相环频合器方案,实现了S波段宽带跳频频合器测试,结果表明:在频率间隔为500MHz时,相位锁定时间为110μs,且相噪低、频谱纯度高,可大大提升系统性能。
The phase recursive equation of loop on the triple-order loop for the first time has gained,and simulation is made on locked time with respect to the signals of both constant frequency and stepped frequency.
以三阶环路为例,首次推导环路的相位递归方程,并对频率固定信号和频率阶跃变化的信号分别进行锁定时间仿真,验证了仿真的正确性。
In DPLL design,locked time and locked range is a pair of contradictory.
针对数字锁相环中环路的锁定时间和锁定范围这一对相互制约的因素,改进了传统的Hilbert变换鉴相器,融合模糊逻辑的非线性推理和微分控制算法,优化环路滤波器参数,充分发挥微分控制的"预测"作用。
A new architecture of charge pump for lowing locking time of phase locked loop (PLL) is proposed.
设计了一种减小PLL锁定时间的新型电荷泵。
PLL lock time is below 15us,power dissipation is below 10mw.
该锁相环的锁定时间低于 15us,功耗小于 10mW。
A wormhole that seems to be locked to a single time and place in the past:
时空裂洞似乎锁定在 过去特定的时间及地点
We'll be back tomorrow at the same time, same channel, so tune in to News Night.
明天我们同一频道、一时间见，所以请锁定“夜间新闻”。
The map is only re-centred on the locked object when the time or date change.
星图仅仅是在时间或日期改变的时候重新以锁定物体为中心。
ectric automatic time release
电气自动定时解锁器
Adjust how long you need to hold down the primary button before your click is "locked":
请调整您需要按下主要按钮多长时间才会“锁定”单击：
It would be allow to return and change the products if it does not disobey headquarter's policy and within the promising time.
在既定时间内，不违反连锁总部政策的前提下，允许加盟商退换货。
Average latch wait time (milliseconds) for latch requests that had to wait.
必须等待的闩锁请求的平均闩锁等待时间（毫秒）。
Try to stay short term and look to lock in for those longer maturities sometime next year after yields have rebounded.
现在先维持短期投资，有明年的某个时候，当利率出现反弹后再锁定到期时间更长的存款或债券。
about the best excavation areas,and he could discover
为何我们被锁定在特定的时空
The AE lock mode locks the exposure value for precise exposure metering.
自动曝光锁定模式可在精确曝光测定量时锁定曝光值
In general, when traveling at night, it is wise to keep the car doors locked.
一般来说，夜间旅行时应把车门锁上。
Be sure to lock the door when you leave the room .
离开房间时务必要锁上门。
Total wait time (milliseconds) for locks in the last second.
锁在最后一秒内的总等待时间（毫秒）。
There's a knack in/to locking this door which takes a while to master.
锁这门要有窍门, 得用些时间才能学会.
The state of the toggle is no longer momentary, but rather locks in place until it is clicked again.
锁定图标按钮状态不再是瞬间的，而是锁定直到再次单击。
Unable to lock the database for deletion of the document library. Another long-running operation could be in progress.
无法锁定数据库以便删除文档库。其他需要长时间运行的操作可能正在进行。
The Food Marketing Institute and the National Council of Chain Restaurants spent almost two years developing the new measures.
食品经营协会和国家连锁饭店委员会花了将近两年的时间才制定出这些新措施。