Explores the reliability of components with a policy of replacing those that fail by a prescribed operating time. Examines reliability growth and test-analyze-and-fix models to quantify when the mean-time-between-failures MTBF and reliability goals of products under development will be attained.
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Problems and reference sections are included in each chapter. Add to Cart. Chapter 1: Reliability of Series Systems. Chapter 2: Reliability of Parallel Systems. Chapter 3: Reliability of Standby Systems. Chapter 8: Load-Sharing Reliability. Chapter 9: Reliability of Static Switches. Chapter Reliability of Cyclic Switches. Chapter Fault Tree Analysis. Chapter Reliability Allocation: Apportionment. Considerable effort has been made to meet the expectations of HF broadcasting engineers from the developing world.
This publication includes relevant texts from existing ITU-R Recommendations as well as advanced material. Of historical value only. Publications by Sector. Further Information. Contact us Privacy notice Accessibility Report misconduct. Emergency and Disaster relief. Computer-aided Techniques for Spectrum Management CAT Spectrum Monitoring The Handbook on Spectrum Monitoring contains the latest information on all aspects of monitoring and represents a valuable reference manual for the spectrum management community. ITU-R propagation prediction methods for interference and sharing studies Curves for Radiowave Propagation over the Surface of the Earth Ionosphere and its Effects on Radiowave Propagation Radiometeorology This Handbook provides general information on radiometeorology and covers the following topics: physical characteristics of the atmosphere, atmospheric refraction, particle scattering, atmospheric gaseous attenuation and dispersion, hydrometeor attenuation, radio emissivity, cross-polarization and anisotropy and statistical aspects of atmospheric processes.
Supplements No. Digital Radio-Relay Systems This Handbook represents a comprehensive summary of basic principles, design parameters and current practices for the design and engineering of digital radio-relay systems. Pins that have the same output enable signal as a bidirectional victim pin that the SSN Analyzer analyzes as an input pin. Pins with the same output enable signal also act as input pins and therefore cannot be aggressor pins at the same time.
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Pins in the same synchronous group as a victim output pin. The SSN Analyzer does not consider pins with this setting as aggressor pins. When SSN analysis is complete, you can view detailed analysis reports.
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The detailed messages in the reports help you understand and resolve SSN problems. Both reports list: Location assignments for the pins. QL and QH noise in volts. Pins created in the migration flow that cover power and supply pins in other packages. Related information Compilation Process Settings Page. A Tcl script allows you to run procedures and determine settings. You can also run some of these procedures at a command prompt. Command-Line Scripting. You can create an assignment that directs the Fitter to optimize pin placements for signal integrity with a Tcl command. You can create PCB layer and thickness assignments with a Tcl command.
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You can create signal breakout layer assignments with a Tcl command. You can create output enable group and synchronous group assignments to help decrease pessimism during SSN Analysis with a Tcl command. You can perform SSN analysis with a command-line command.
Date Version Changes FPGA design software that easily integrates into your design flow saves time and improves productivity. Related information About Command-Line Executables. Help for command-line executables is available through different methods.
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You can access help built into the executables with command-line options. Project assignments follow a set of precedence rules. Typical Design Flow. Each command-line executable creates a text report file when it is run. These files report success or failure, and contain information about the processing performed by the executable. Related information Text-Format Report File. This example assumes you use Synplify software synplify -batch synthesize. The command-line executables include options for common global project settings and commands.
You can use a Tcl script to apply constraints such as pin locations and timing assignments. This makes it easy to take snapshots of projects when you use batch files or shell scripts for compilation and project management. You can use two commands to update the contents of memory blocks in your design without recompiling.
You can create a compressed configuration file in two ways. This example assumes that a project called top exists in the current directory, and that the name of the top-level entity is top.
jitsi.pebibits.com/2539-what-is.php You can use the QFlow interface to open projects, launch some of the command-line executables, view report files, and make some global project assignments. Updated examples. Removed Qflow illustration.
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Updated references in document. Related information Tcl Design Examples. Tcl supports control structures, variables, network socket access, and APIs. Related reference External References. Tcl Scripting Basics. Related information tcl. Related concepts Command Line Scripting. Examples: help -pkg ::quartus::project help -pkg project help -pkg project -version 1. Example: package require ::quartus::project 1. You can use any of the following command line options with executables that support Tcl:. The -t option is the short form of the --script option.
The -s option is the short form of the --shell option. Running an executable with the -t option runs the specified Tcl script. You can also specify arguments to the script. Access the arguments through the argv variable, or use a package such as cmdline , which supports arguments of the following form:. Running an executable with the -s option starts an interactive Tcl shell. This can be useful if you want to run simple Tcl commands from other scripting languages.
Note: Some shell commands such as cd , ls , and others can be run in the Tcl Console window, with the Tcl exec command. You can use Tcl scripts to control all aspects of the design flow, including controlling other software, when the other software also includes a scripting interface. You can create a script that makes all the assignments for an existing project, and then use the script at any time to restore your project settings to a known state.
To commit the assignments you create or modify to the. Create and Compile a Project The following example creates a project, makes assignments, and compiles the design. Related concepts Constraining Designs. Related reference Interactive Shell Mode. You can use a simple Tcl script to compile all revisions in your project.
You can extract information from the Compilation Report to evaluate results. You can configure scripts to run automatically at various points during compilation. Use this capability to automatically run scripts that perform custom reporting, make specific assignments, and perform many other tasks. Because the same script is run after every module, you might have to include some conditional statements that restrict processing in your script to certain modules.
Automating Script Execution. Natural bus naming allows to use square brackets to specify bus indexes in HDL without including escape characters to prevent Tcl from interpreting the square brackets as containing commands. You can take advantage of natural bus naming when making assignments. You can use short versions of command options, as long as they are unambiguous.
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