Cable Plant Testing and Maintenance Procedures in Software

Integrated PDF417 in Software Cable Plant Testing and Maintenance Procedures

Reflectivity. The height of the peak (b) yields the strength of the reflection in relation to other reflections along the fiber. Attenuation. Assuming the level of Rayleigh backscatter is consistent at all points along the fiber, the slope (c) of the backscatter directly yields the attenuation of the fiber in dB/km. The assumption of consistent backscatter at all points is justified for all fibers except those intentionally manufactured with a position-dependent parameter. For example, a fiber made with a graded chromatic dispersion may exhibit a slight gradation in backscatter. Discrete loss. The loss in a splice between fiber sections is given by the reduction (d) in the trace at the splice, assuming the level of Rayleigh backscatter is the same in both fiber sections. The assumption of identical backscatter in different sections of fiber is justified when the sections are manufactured under very similar conditions, such as when a number of spools of fiber of the same model number are purchased from the same manufacturer.

The type parameter required by ITwoDCoord must be specified by the implementing class, which is XYCoord in this case. Otherwise, there is no way for the interface to receive the type argument. Next, XYCoord declares two variables called X and Y that hold the coordinates. These are, as one would expect, objects of the generic type T. Finally, the methods defined by ITwoDCoord are implemented. ITwoDCoord is also implemented by the class XYZCoord. It encapsulates threedimensional (X,Y,Z) coordinates. It implements the methods defined by ITwoDCoord and adds methods to access the Z coordinate. In GenInterfaceDemo, a generic method called ShowXY( ) is defined. It displays the X,Y coordinates of the object that it is passed. Notice that the type of its parameter is ITwoDCoord. This means that it can operate on any object that implements the ITwoDCoord interface. In this case, it means that objects of type XYCoord and XYZCoord can be used as arguments. This fact is illustrated by Main( ). A type parameter for a generic interface can have constraints in the same way as it can for a generic class. For example, this version of ITwoDCoord restricts its use to value types:

Facsimile (Fax) Data Communications (DC)

Use Coaching Techniques That Challenge Growth Plan how you will use each of the four coaching techniques from this section, and use them at appropriate moments during the coaching process.

like AMPS or TACS, where the carrier is a continuous-wave signal that can be measured simply with a broadband power meter. We will examine two power measurement techniques, one for the GSM system and one for the IS95 CDMA system.

mary key), ItemDesc, ItemPrice, and ItemType. For the Nurse entity type, add attributes NurseNo (primary key), NurseFirstName, NurseLastName, NurseTitle, NursePhone, NurseSpecialty, and

As mentioned at the start of this chapter, all C# programs have at least one thread of execution, called the main thread, which is given to the program automatically when it begins running. The main thread can be handled just like all other threads. To access the main thread, you must obtain a Thread object that refers to it. You do this through the CurrentThread property, which is a member of Thread. Its general form is shown here: public static Thread CurrentThread{ get; } This property returns a reference to the thread in which it is used. Therefore, if you use CurrentThread while execution is inside the main thread, you will obtain a reference to the main thread. Once you have this reference, you can control the main thread just like any other thread. The following program obtains a reference to the main thread and then gets and sets the main thread s name and priority:

U n s a f e C o d e , P o i n t e r s , N u l l a b l e Ty p e s , D y n a m i c Ty p e s , a n d M i s c e l l a n e o u s To p i c s

C>Phone Mary Mary: 555-8976