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barcode printing using vb.net Leading phase in Software
Leading phase Decode QR In None Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications. Quick Response Code Drawer In None Using Barcode generation for Software Control to generate, create QR Code image in Software applications. Two waves can differ in phase by any amount from 0 degrees (in phase), through 180 degrees (phase opposition), to 360 degrees (back in phase again). QR Code 2d Barcode Scanner In None Using Barcode scanner for Software Control to read, scan read, scan image in Software applications. Make QR Code 2d Barcode In C# Using Barcode encoder for Visual Studio .NET Control to generate, create QR Code image in .NET applications. Leading phase 223
Print QR In .NET Using Barcode generator for ASP.NET Control to generate, create QR Code JIS X 0510 image in ASP.NET applications. Quick Response Code Generator In .NET Framework Using Barcode printer for VS .NET Control to generate, create QR Code image in .NET applications. 128 Two sine waves in phase opposition.
QR Code Generation In VB.NET Using Barcode generation for .NET Control to generate, create QR Code ISO/IEC18004 image in .NET applications. Barcode Printer In None Using Barcode generation for Software Control to generate, create bar code image in Software applications. Suppose there are two sine waves, wave X and wave Y, with identical frequency. If wave X begins a fraction of a cycle earlier than wave Y, then wave X is said to be leading wave Y in phase. For this to be true, X must begin its cycle less than 180 degrees before Y. Figure 129 shows wave X leading wave Y by 90 degrees of phase. The difference could be anything greater than 0 degrees, up to 180 degrees. USS128 Encoder In None Using Barcode generator for Software Control to generate, create UCC128 image in Software applications. GS1  12 Printer In None Using Barcode creation for Software Control to generate, create GTIN  12 image in Software applications. 129 Wave X leads wave Y by 90 degrees.
Make Bar Code In None Using Barcode creation for Software Control to generate, create barcode image in Software applications. Data Matrix Maker In None Using Barcode printer for Software Control to generate, create Data Matrix ECC200 image in Software applications. Note that if wave X (the dotted line in Fig. 129) is leading wave Y(the solid line), then wave X is somewhat to the left of wave Y. In a time line, the left is earlier and the right is later. 2 Of 5 Interleaved Drawer In None Using Barcode generator for Software Control to generate, create USS ITF 2/5 image in Software applications. UCC  12 Maker In .NET Framework Using Barcode generator for Visual Studio .NET Control to generate, create UCC  12 image in .NET framework applications. 224 Phase
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Draw Code 39 In ObjectiveC Using Barcode encoder for iPhone Control to generate, create Code 3 of 9 image in iPhone applications. Barcode Generator In None Using Barcode drawer for Font Control to generate, create bar code image in Font applications. Suppose that wave X begins its cycle more than 180 degrees, but less than 360 degrees, ahead of wave Y. In this situation, it is easier to imagine that wave X starts its cycle later than wave Y, by some value between 0 and 180 degrees. Then wave X is not leading, but instead is lagging, wave Y. Figure 1210 shows wave X lagging wave Y by 90 degrees. The difference could be anything between 0 and 180 degrees. Scanning EAN13 In None Using Barcode reader for Software Control to read, scan read, scan image in Software applications. Barcode Drawer In .NET Using Barcode printer for .NET framework Control to generate, create bar code image in VS .NET applications. 1210 Wave X lags wave Y by 90 degrees.
You can surmise by now that leading phase and lagging phase are different ways of looking at similar animals. In practice, ac sine waves are oscillating rapidly, sometimes thousands, millions, or even billions of times per second. If two waves have the same frequency and different phase, how do you know that one wave is really leading the other by some small part of a cycle, instead of lagging by a cycle and a fraction, or by a few hundred, thousand, million, or billion cycles and a fraction The answer lies in the reallife effects of the waves. Engineers and technicians think of phase differences, for sine waves having the same frequency, as always being between 0 and 180 degrees, either leading or lagging. It rarely matters, in practice, whether one wave started a few seconds earlier or later than the other. So, while you might think that the diagram of Fig. 129 shows wave X lagging wave Y by 270 degrees, or that the diagram of Fig. 1210 shows wave X leading wave Y by 270 degrees, you would get an odd look from an engineer if you said so aloud. And if you said something like This wave is leading that one by 630 degrees, you might actually be laughed at. Note that if wave X (the dotted line in Fig. 1210) is lagging wave Y (the solid line), then wave X is somewhat to the right of wave Y. Vector diagrams of phase relationships 225
Vector diagrams of phase relationships
The circular renditions of sine waves, such as are shown in the four drawings of Fig. 125, are well suited to showing phase relationships. If a sine wave X is leading a sine wave Y by some number of degrees, then the two waves can be drawn as vectors, with vector X being that number of degrees counterclockwise from vector Y. If wave X lags Y by some number of degrees, then X will be clockwise from Y by that amount. If two waves are in phase, their vectors overlap (line up). If they are in phase opposition, they point in exactly opposite directions. The drawings of Fig. 1211 show four phase relationships between waves X and Y. At A, X is in phase with Y. At B, X leads Y by 90 degrees. At C, X and Y are 180 degrees opposite in phase; at D, X lags Y by 90 degrees. In all cases, you can think of the vectors rotating counterclockwise at the rate of f revolutions per second, if their frequency is f Hz. 1211 Vector representation of phase. At A, waves X and Y are in phase; at B, X leads Y by 90 degrees; at C, X and Y are 180 degrees out of phase; at D, X lags Y by 90 degrees.

