Pulse Modulation & its types

Pulse Modulation -      consists essentially of sampling analog information signals and then converting those samples into discrete pulses and transporting the pulses from a source to a destination over a physical transmission medium The four predominant...

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Disadvantages of Digital Transmission

Disadvantages of Digital Transmission -      the transmission of digitally encoded analog signals requires significantly more bandwidth than simply transmitting the original analog signal -      needs additional encoding and decoding circuitry because analog signals must be converted to digital...

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Advantages of Digital Transmission

Advantages of Digital Transmission -      noise immunity o    pulses are evaluated during a precise time interval and a simple determination is made whether the pulse is above or below a prescribed reference level -      better suited than analog signals for processing and combining...

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Digital Transmission

Digital Transmission –      is the transmittal of digital signals between two or more points in a communications system –      The signals can be binary or any other form of discrete-level digital pulses. –      The...

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String Functions in Visual Basic 6

VB has numerous built-in string functions for processing strings. Most VB string-handling functions return a string, although some return a number (such as the Len function, which returns the length of a string and functions like Instr and InstrRev, which return a character position within the string). The functions that...

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