如果多个线程在完成上面的初始调用后尝试锁定信号量，则这些线程会被阻塞，它们的请求进入队列，直到执行pthread _ mutex_unlock调用。
If multiple threads attempt to lock a semaphore after the initial call above, they block and their requests are queued until the pthread_mutex_unlock call is performed.
通过测量信号在卫星和天线之间传播所需的时间，汽车的位置可以被锁定在100米误差之内。
By measuring the time required for a signal to travel between the satellites and the antenna, the car's location can be pinned down within 100 meters.
在很多方面，轻便线程比大多数变体都简单得多；大多数关于信号、锁定及诸如此类的问题都不存在了。
In most respects weightless threads are quite a bit simpler than most variants; most issues about semaphores, locking, and the like disappear.
通过强制再获取时序，前端模块复位并搜索视频信号，从而确保迅速锁定新的视频源。
By forcing a timing reacquire, the front end block resets and "hunts" for a video signal, thus ensuring the speedy locking to a new video source.
然而，DYNASDSP的不对称滤波器响应往往意味着的T- 4970将很难锁定到一个以上的DX信号或信号之间的地方(第)。
However, the DYNAS DSP asymmetrical filter response often means the T-4970 will have difficulty locking on to a DX signal above or in between the local signal (s).
锁定放大器和取样积分器都不能抑制与参考信号同频率的干扰。本文提出了一种能抑制这种干扰的方法。
This paper describes a method of suppressing correlation jamming at the frequency of reference signal which cannot be suppressed by lock-in amplifier and Boxcar integrator.
锁定重建新信号，他说。
光信号用锁定放大器放大，进行动态测量。
探讨了用DSP(数字信号处理器)和采样adc(模数转换器)实现数字锁定放大器的一种方法。
A method of implementing digital lock in amplifier with DSP (digital signal processor) and sampling ADC (analog digital converter) is discussed.
这意味着，如果一个接收器可以锁定传入接口信号，然后将音频字值是安全的。
This means that if a receiver can lock onto an incoming interface signal, then the audio word values are safe.
论文提出了一个以远距离传输的标准时间信号为参考来锁定本地晶体振荡器的锁相控制系统的实现方案。
In this paper, a solution of a control system, which USES the standard time signal as the system reference to lock the local VCXO, is proposed.
经实践验证，该系统实现了自动控制接收天线转向并锁定某一个同步通信卫星，以获得最佳的通信信号。
It is proved that this system automatically steers the direction of a receiver antenna and locks a synchronous satellite in order to acquire best communication signal.
低阶锁相环跟踪频率斜升信号时产生的稳态相差致使环路失锁，接收机无法锁定载波信号。
Due to steady phase error, low-order PLL has a trouble in tracking frequency ramp signals, so that the receiver cannot lock carrier signals.
随着电压VCTR改变，VCO 104改变VCO输出信号的频率，使得当pll 100处于锁定模式时引起脉冲偏移和增大的输出抖动，如图中虚线202所示。
As the voltage VCTR varies, VCO 104 varies the frequency of the VCO output signal, causing phase offsets and increased output jitter when PLL 100 is in lock mode, as shown by dotted line 202.
例如它决定信号变化多快仍然可以维持锁定。
For example, it determines how fast the signal frequency can change and still maintain lock.
锁相环频率合成器是一种相位锁定装置，是一种频率稳定度较高的离散间隔型频率信号发生器。
The phase-locked loop frequency synthesizer is a kind of phase lock installment and it is a kind of separate gap frequency code generator with high stability frequency.
为将接收二极管上的微弱信号送到A／D转换器处理，采用锁定放大原理设计接收信号的调理电路。
We use the principle of lock - in amplifier to amplify the weak singal and send it to A/ D conversion properly.
在信号量锁定之前就超时了。
解码电路对信号进行全面恢复处理，具有自动相位锁定功能。
Signal processing circuit and demodulation circuit with an automatic phase-locked junction can recover the data signal from the cable.
维持锁定的直流控制电压由鉴相器提供，因此鉴相器的两个输入信号间留有一定的相位差。
The maintenance locking cocurrent control voltage provides by the discriminator, therefore between the discriminator two input signal leaves leeway certain phase difference.
锁定：扫描将停在发现的一个信号频率上，不再继续扫描操作。
HOLD: The scanner will stop when a signal is received, and will not restart.
锁定输出继电器要求每个读卡器只能向挡板系统输出一个出入信号且打开大门。
The lock output relay requires only one output for each card reader to grant access to the tailgate system and unlock the door.
当基准和反馈时钟信号的相位和频率相同时，PLL处于锁定模式，且PFD输出信号中不生成脉冲。
When the phase and frequency of the reference and feedback clock signals are the same, the PLL is in lock mode, and the PFD does not generate pulses in its output signals.
本文还叙述了斯塔克盒锁定CO_2激光器频率的实验，并且观察到的探测器输出信号与计算机计算的结果吻合。
The experiment of CO_2 laser frequency controlled by MH_2D Stark cell is also introduced. The observed detector output signal is consistent with compu…
然后，在光接收器处提供一些装置，以便发现并锁定发送过来的WDM信号的漂移波长栅格，这之后对发送过来的WDM信号进行多路分配以便于OE转换。
Means are then provided at an optical receiver to discover and lock onto floating wavelength grid of transmitted WDM signals and thereafter demultiplex the transmitted WDM signals for OE conversion.
采用耐高温的锁定型霍尔元件和钐钴永磁转子分别构成位置与速度传感器，并设计相应的速度信号倍频电路与位置信号译码电路。
Fireresistant Hall device and SmCo rotor is used to design position and speed sensor, and the corresponding doubling circuit and decoding circuit is designed.
结果表明，射频信号的驱动电压，系统中偏振态的变化是影响频率锁定多载波光源产生的主要因素。
The results show that the radio frequency drive voltage, the variation of states of polarization are main factors to affect the generation of the frequency-locked multi-carrier source.
结果表明，射频信号的驱动电压，系统中偏振态的变化是影响频率锁定多载波光源产生的主要因素。
The results show that the radio frequency drive voltage, the variation of states of polarization are main factors to affect the generation of the frequency-locked multi-carrier source.
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