 Home
 Products
 Integration
 Tutorial
 Barcode FAQ
 Purchase
 Company
Cable System Network Design Considerations in Software
Cable System Network Design Considerations PDF417 2d Barcode Generation In None Using Barcode creation for Software Control to generate, create PDF417 2d barcode image in Software applications. PDF417 Decoder In None Using Barcode reader for Software Control to read, scan read, scan image in Software applications. Questions
PDF417 2d Barcode Creation In Visual C#.NET Using Barcode drawer for VS .NET Control to generate, create PDF417 2d barcode image in .NET applications. Making PDF417 2d Barcode In VS .NET Using Barcode printer for ASP.NET Control to generate, create PDF417 image in ASP.NET applications. 1 Explain the difference between telephone system local lines and trunk lines 2 What is the purpose for twisting the pairs of wires in a telephone cable 3 What is the purpose of placing loading coils (inductances) in telephone line circuits 4 What does the acronym CATV mean 5 Describe the network architecture for cable television systems 6 Describe cable system choices of method for the reverse of upstream network 7 Describe how optical ber technology is used in the forward or downstream sections of a cable television plant 8 Explain an HFC network 9 What is the largest network protocol for LAN networks 10 Describe the three choices of network topology for LAN systems 11 What type of network topology is used for Ethernet 12 Explain the process used to transmit digital signals on a cable system PDF417 Drawer In .NET Framework Using Barcode drawer for VS .NET Control to generate, create PDF417 2d barcode image in .NET applications. PDF417 Creator In VB.NET Using Barcode drawer for VS .NET Control to generate, create PDF417 image in .NET framework applications. This page intentionally left blank
Code 128 Code Set B Creation In None Using Barcode drawer for Software Control to generate, create Code 128 Code Set C image in Software applications. GS1128 Maker In None Using Barcode printer for Software Control to generate, create UCC.EAN  128 image in Software applications. APPENDIX A
Paint Barcode In None Using Barcode generator for Software Control to generate, create barcode image in Software applications. Create UPC Code In None Using Barcode generator for Software Control to generate, create GS1  12 image in Software applications. Proof and Discussion of Pertinent Equations
Make Data Matrix In None Using Barcode creation for Software Control to generate, create Data Matrix ECC200 image in Software applications. Printing Barcode In None Using Barcode maker for Software Control to generate, create bar code image in Software applications. 1 The rst two equations are explained using the simple resistance capacitance circuit where the input voltage source is in series with a resistor of R ohms in series with a capacitor of C microfarads The output voltage is taken across the capacitor Draw ISSN  13 In None Using Barcode printer for Software Control to generate, create International Standard Serial Number image in Software applications. ECC200 Decoder In None Using Barcode recognizer for Software Control to read, scan read, scan image in Software applications. R In C Out
Printing Code128 In None Using Barcode printer for Microsoft Word Control to generate, create Code128 image in Microsoft Word applications. Linear 1D Barcode Encoder In VB.NET Using Barcode generator for .NET framework Control to generate, create Linear 1D Barcode image in .NET framework applications. This circuit, in many applications, represents a voltage source where R is the equivalent resistance and C is the Miller capacitance of the ampli er input connected across the capacitance C When Vin is a sinusoidal signal voltage, the ac value of the capacitive reactance in ohms is Xc 1 _____ 2pfC when the magnitude of Xc 1/2pfC, f 1 ______ 2pRC R in solving for f UPCA Supplement 5 Reader In Visual Basic .NET Using Barcode reader for Visual Studio .NET Control to read, scan read, scan image in VS .NET applications. Bar Code Maker In Java Using Barcode creation for Java Control to generate, create barcode image in Java applications. Substituting R
Printing UPC Code In None Using Barcode creator for Font Control to generate, create Universal Product Code version A image in Font applications. EAN13 Creation In Java Using Barcode maker for Java Control to generate, create EAN13 image in Java applications. where f is the frequency of the input voltage Vin (RMS) when Xc R This is called the cutoff frequency of this simple lowpass lter, which is often referred to as a basic integrator The attenuation in output voltage at this frequency may be calculated as follows using the voltage divider theorem: Vout Xc _____ (V ) in Rj Xc where RjX c is 90 leading Converting to polar coordinates and solving, out ______ V Vin
Xc _________________ (R2 Xc X 2)arctan___ c R
Copyright 2005 by The McGrawHill Companies, Inc Click here for terms of use
Since Xc R, Vout ____ Vin Vout Xc _______ (2X c) 2 1/2 Appendix A
Xc ________ (Xc)(2)1/2 Vout or ____ Vin
1 _____ (2)1/2 0707 0707Vin
Since Vout /Vin represents the circuit gain, Vout 20 log ____ Vin 20 log 0707 3 dB
where the minus sign means a negative gain or attenuation 2 Proof of the rise time equation for the same resistor capacitive circuit Since digital signal voltages vary between two values, the response of this circuit to sudden voltage changes is important The rise time is the measure of this response A short rise time means this circuit responds faster to sudden changes in input voltage This circuit follows the charging curve for the RC circuit where R C the circuit time constant where R is in ohms and C is in farads Since the output voltage is Vc, we may write Vc Vmax(1 e t/RC
where RC
time constant
The IEEE stated that the rise time is the time it takes for Vc at 01Vmax to reach V at 09Vmax Vc and substituting, 01Vmax Multiplying, 01Vmax Combining terms, 09Vmax Vmaxe t/RC
01Vmax
Vmax(1 t/RC
Vmax
Vmaxe
t/RC
Proof and Discussion of Pertinent Equations
Dividing by Vmax and multiplying by 09 1, e
t/RC
Taking the natural logarithm of both terms, ln Using the calculator, 09 So t 01RC at 01Vmax when Vc 09Vmax Multiplying, 09Vmax Vmax Vmaxe Dividing by Vmax, multiplying by e Taking the natural logarithm, ln e Solving for t, t ___ RC 23 at 09Vmax t/RC
ln e
t/RC
t ___ RC
09Vmax Substituting, Vmax(1 e
t/RC
Vmaxe
t/RC
t/RC
01Vmax
1, and rearranging terms, t/RC
ln 01
The rise time is de ned as the time it takes for the capacitor to charge from 10% Vmax to 90% Vmax Rise time tr t09 t01 01RC 22RC 23RC tr 22RC
Appendix A
To investigate the frequency response of this basic lowpass lter, recall that we previously derived fc Solving for the RC product, RC Substituting for RC tr/22, RC tr ___ 22 22 ____ 2pfc Solving for fc, fc 035 _____ tr 1 ____ 2pfc 035 _____ fc 1 ______ 2pfc 1 ______ 2pRC Since the bandwidth (BW) is from zero frequency to the cutoff frequency, fc Substituting, BW 035 _____ tr BW This result relates the lowpass lter circuit bandwidth to the rise time A shorter (quicker rise time) increases the bandwidth 3 Proof of the equation Pr ___ Pt Gt Gr 325 dB 20 log dkm 20 log fMHz Consider a source of power at a point in space radiating electromagnetic energy into space in all directions the equation describing this action is

