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Radio Studios
Published in Skip Pizzi, Graham A. Jones, A Broadcast Engineering Tutorial for Non-Engineers, 2014
Radio stations must have accurate time for scheduling and live announcements, and time displays in all rooms in the radio facility must be coordinated. Therefore radio facilities usually install a master clock system, which provides multiple slave clocks with analog faces and second hands, or digital displays, in all studios and control rooms. The master clock is a highly accurate device that is usually synchronized to an external reference such as global positioning system (GPS) signals received from satellites, or other standard time updates received over the air or via a phone line from various time-reference sources. The master clock also provides accurate time to the program automation system and other computer systems in the facility that need it.
Synchronous Sequential Circuits
Published in Sajjan G. Shiva, Introduction to Logic Design, 2018
A synchronous sequential circuit generally is controlled by pulses from a master clock. The flip-flops in the circuit make a transition to the new state only when a clock pulse is present at their inputs. In the absence of a single master clock, the operation of the circuit becomes unreliable, since two clock pulses arriving from different sources at the inputs of the flip-flops cannot be guaranteed to arrive at the same time (because of unequal path delays). This phenomenon is called clock skewing. Clock skewing can be avoided by analyzing the delay in each path from the clock source and inserting additional gates in paths with shorter delays to make the delays of all paths equal.
Making Connections
Published in Sam McGuire, Roy Pritts, Audio Sampling, 2013
The master clock can either be the internal clock of one piece of equipment (every piece of equipment that uses digital signals has one), or it can be an external box designed to be a master clock. To connect two clocks together without an external master clock, you can use the digital cable you are already using. AES3, S/PDIF, and most other digital signals have clocking signals embedded with the audio data. You only need to tell the equipment who is the master and who is the slave, and then it will work. This is sometimes a menu choice or a switch on the back. See the equipment’s specific instructions for more information.
A temporal based approach for MapReduce distributed testing
Published in International Journal of Parallel, Emergent and Distributed Systems, 2021
Sara Hsaini, Salma Azzouzi, My El Hassan Charaf
Where: c is reception time measured by the clock Port(a).Master Clock provides the reference time for all clocks in the testing system.The function Port (k ⇐Port (!Xi) ) returns the port corresponding to a given message !Xi.Inter-port timing constraints
Timing Synchronization System on RF-Driven Neutral Beam Injection System
Published in Fusion Science and Technology, 2022
Y. Li, C. D. Hu, Y. Z. Zhao, Q. L. Cui, X. L. Shu, Y. H. Xie, W. Liu
The main functions of the TSS include the sync function for synchronizing the clock and time of the NNBIS, network synchronization trigger function, timing and amplitude output function, network communication function, and asynchronous event-processing functions such as breakdown. According to the functions to be realized, the TSS of the RF ion source is divided into the time synchronization module and the timing control module. Before the NNBI experiment, the TSS should start the synchronization network, and the master device sets a unified clock reference. The slave devices synchronize their own clock with the master clock through clock correction until the whole network remains synchronized. This clock synchronization process will be periodically corrected to ensure that the synchronization network clock is synchronized after the preparation and throughout the experiment. When the TSS is in place, the experimental configuration information is retrieved from the remote console. Once receiving the start command from the remote control center (RCC), the TSS host sends the corresponding network and hardware triggers to the different subsystems. In the process of the experiment, there would be experimental failures such as ion source ignition. The TSS will open the asynchronous event-processing module after receiving the corresponding fault signal. The NNBICS will use the high-speed DAQ system to store the lighter moments of various experimental parameters to avoid the problem of resource waste caused by the high-speed DAQ system remaining open. This will facilitate the experimental personnel to analyze and adjust the experimental process or parameters after the experiment to ensure the complete and orderly conduct of the NNBI discharge experiment. The whole structure of the TSS is shown in Fig. 1.