.MCAD 304020000 1 74 16137 0
.CMD PLOTFORMAT
0 0 0 0 0 1 0 0 1 1 1 
0 0 0 0 0 1 0 0 1 1 1 
0 1 6 0 1 1 1 1 NO-TRACE-STRING
0 2 6 0 1 1 1 1 NO-TRACE-STRING
0 3 6 0 1 1 1 1 NO-TRACE-STRING
0 4 6 0 1 1 1 1 NO-TRACE-STRING
0 1 4 0 1 1 1 1 NO-TRACE-STRING
0 2 5 0 1 1 1 1 NO-TRACE-STRING
0 3 6 0 1 1 1 1 NO-TRACE-STRING
0 4 0 0 1 1 1 1 NO-TRACE-STRING
0 1 1 0 1 1 1 1 NO-TRACE-STRING
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0 3 3 0 1 1 1 1 NO-TRACE-STRING
0 4 4 0 1 1 1 1 NO-TRACE-STRING
0 1 5 0 1 1 1 1 NO-TRACE-STRING
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0 4 1 0 1 1 1 1 NO-TRACE-STRING
0 1 1 1 30 0 24 0 0 3 
.CMD FORMAT  rd=d ct=10 im=i et=3 zt=15 pr=3 mass length time charge temperature tr=0 vm=0
.CMD SET ORIGIN 0
.CMD SET TOL 0.001000000000000
.CMD SET PRNCOLWIDTH 8
.CMD SET PRNPRECISION 4
.CMD PRINT_SETUP 1.200000 1.197917 1.200000 1.200000 0
.CMD HEADER_FOOTER 1 1 *empty* *empty* *empty* 0 1 |F |P |D^^|T
.CMD HEADER_FOOTER_FONT fontID=14 family=Arial points=10 bold=0 italic=0 underline=0 colrid=1359499528
.CMD HEADER_FOOTER_FONT fontID=15 family=Arial points=10 bold=0 italic=0 underline=0 colrid=1359499528
.CMD DEFAULT_TEXT_PARPROPS 0 0 0
.CMD DEFINE_FONTSTYLE_NAME fontID=0 name=Variables
.CMD DEFINE_FONTSTYLE_NAME fontID=1 name=Constants
.CMD DEFINE_FONTSTYLE_NAME fontID=2 name=Text
.CMD DEFINE_FONTSTYLE_NAME fontID=4 name=User^1
.CMD DEFINE_FONTSTYLE_NAME fontID=5 name=User^2
.CMD DEFINE_FONTSTYLE_NAME fontID=6 name=User^3
.CMD DEFINE_FONTSTYLE_NAME fontID=7 name=User^4
.CMD DEFINE_FONTSTYLE_NAME fontID=8 name=User^5
.CMD DEFINE_FONTSTYLE_NAME fontID=9 name=User^6
.CMD DEFINE_FONTSTYLE_NAME fontID=10 name=User^7
.CMD DEFINE_FONTSTYLE fontID=0 family=Times^New^Roman points=10 bold=0 italic=0 underline=0 colrid=-1
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.CMD DEFINE_FONTSTYLE fontID=5 family=Courier^New points=10 bold=0 italic=0 underline=0 colrid=-1
.CMD DEFINE_FONTSTYLE fontID=6 family=System points=10 bold=0 italic=0 underline=0 colrid=-1
.CMD DEFINE_FONTSTYLE fontID=7 family=Script points=10 bold=0 italic=0 underline=0 colrid=-1
.CMD DEFINE_FONTSTYLE fontID=8 family=Roman points=10 bold=0 italic=0 underline=0 colrid=-1
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.CMD UNITS U=1
.CMD DIMENSIONS_ANALYSIS 0 0
.CMD COLORTAB_ENTRY 0 0 0
.CMD COLORTAB_ENTRY 128 0 0
.CMD COLORTAB_ENTRY 0 128 0
.CMD COLORTAB_ENTRY 128 128 0
.CMD COLORTAB_ENTRY 0 0 128
.CMD COLORTAB_ENTRY 128 0 128
.CMD COLORTAB_ENTRY 0 128 128
.CMD COLORTAB_ENTRY 128 128 128
.CMD COLORTAB_ENTRY 192 192 192
.CMD COLORTAB_ENTRY 255 0 0
.CMD COLORTAB_ENTRY 0 255 0
.CMD COLORTAB_ENTRY 255 255 0
.CMD COLORTAB_ENTRY 0 0 255
.CMD COLORTAB_ENTRY 255 0 255
.CMD COLORTAB_ENTRY 0 255 255
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.TXT 2 1 1 0 0
Cg a45.250000,45.250000,45
{\rtf\ansi \deff0{\colortbl;\red0\green0\blue128;}{\fonttbl{\f0
\fcharset0\fnil Courier;}}\plain\cf1\fs20 \pard TRANSMISSION LINE MADE 
FROM TWISTED PAIR WIRE}
.TXT 0 55 2 0 0
Cg a16.250000,16.250000,16
{\rtf\ansi \deff0{\colortbl;\red0\green0\blue128;}{\fonttbl{\f0
\fcharset0\fnil Courier;}}\plain\cf1\fs20 \pard file:  twist.mcd}
.TXT 6 -55 3 0 0
Cg a38.250000,38.250000,38
{\rtf\ansi \deff0{\colortbl;\red0\green0\blue128;}{\fonttbl{\f0
\fcharset0\fnil Courier;}}\plain\cf1\fs20 \pard Formulas included in 
this spreadsheet:}
.TXT 4 2 4 0 0
Cg a51.250000,51.250000,208
{\rtf\ansi \deff0{\colortbl;\red0\green0\blue128;}{\fonttbl{\f0
\fcharset0\fnil Courier;}}\plain\cf1\fs20 \pard Twisted-pair 
characteristic impedance      ZTWIST()\par Twisted-pair propagation 
delay             PTWIST()\par Twisted-pair inductance                    
LTWIST()\par Twisted-pair capacitance                   CTWIST()\par }
.EQN 8 30 16131 0 0
{   31    36 5920 0 8 801 961}{66}
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.TXT 4 -32 6 0 0
Cg a15.250000,15.250000,15
{\rtf\ansi \deff0{\colortbl;\red0\green0\blue128;}{\fonttbl{\f0
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.TXT 4 2 7 0 0
Cg a26.250000,26.250000,167
{\rtf\ansi \deff0{\colortbl;\red0\green0\blue128;}{\fonttbl{\f0
\fcharset0\fnil Courier;}}\plain\cf1\fs20 \pard d   Diameter of wire 
(in.)\par \par s   Separation between\par     wires (in.)\par x   
Length of wire (in.)\par \par er  Effective relative\par     
dielectric constant of\par     medium between wires}
.TXT 28 -2 8 0 0
Cg a45.500000,45.500000,45
{\rtf\ansi \deff0{\colortbl;\red0\green0\blue128;}{\fonttbl{\f0
\fcharset0\fnil Courier;}{\f1\fcharset2\fnil Symbol;}}\plain\cf1\fs20 
\pard Characteristic impedance of twisted pair ({\f1 W}):}
.EQN 4 19 9 0 0
{0:ZTWIST}NAME({0:d}NAME,{0:s}NAME,{0:er}NAME):(120)/(\({0:er}NAME))*{0:ln}NAME((2*{0:s}NAME)/({0:d}NAME))
.TXT 8 -19 10 0 0
Cg a47.250000,47.250000,47
{\rtf\ansi \deff0{\colortbl;\red0\green0\blue128;}{\fonttbl{\f0
\fcharset0\fnil Courier;}}\plain\cf1\fs20 \pard Propagation delay per 
in. twisted pair (s/in.):}
.EQN 4 19 11 0 0
{0:PTWIST}NAME({0:er}NAME):84.72*(10)^(-12)*\({0:er}NAME)
.TXT 6 -19 12 0 0
Cg a31.250000,31.250000,31
{\rtf\ansi \deff0{\colortbl;\red0\green0\blue128;}{\fonttbl{\f0
\fcharset0\fnil Courier;}}\plain\cf1\fs20 \pard Inductance of twisted 
pair (H):}
.EQN 4 16 13 0 0
{0:LTWIST}NAME({0:d}NAME,{0:s}NAME,{0:x}NAME):{0:x}NAME*10.16*(10)^(-9)*{0:ln}NAME((2*{0:s}NAME)/({0:d}NAME))
.TXT 6 -16 14 0 0
Cg a32.250000,32.250000,32
{\rtf\ansi \deff0{\colortbl;\red0\green0\blue128;}{\fonttbl{\f0
\fcharset0\fnil Courier;}}\plain\cf1\fs20 \pard Capacitance of twisted 
pair (F):}
.EQN 4 16 15 0 0
{0:CTWIST}NAME({0:d}NAME,{0:s}NAME,{0:er}NAME,{0:x}NAME):(({0:x}NAME*.7065*(10)^(-12))/({0:ln}NAME((2*{0:s}NAME)/({0:d}NAME))))*{0:er}NAME
.TXT 14 -16 17 0 0
Cg a67.250000,67.250000,101
{\rtf\ansi \deff0{\colortbl;\red0\green0\blue128;}{\fonttbl{\f0
\fcharset0\fnil Courier;}}\plain\cf1\fs20 \pard 
___________________________________________________________________
\par Example twisted-pair calculations}
.TXT 8 2 18 0 0
Cg a29.250000,29.250000,29
{\rtf\ansi \deff0{\colortbl;\red0\green0\blue128;}{\fonttbl{\f0
\fcharset0\fnil Courier;}}\plain\cf1\fs20 \pard Diameter of AWG 24 
wire (in.)}
.EQN 0 37 19 0 0
{0:D}NAME:.02
.TXT 4 -37 20 0 0
Cg a20.250000,20.250000,20
{\rtf\ansi \deff0{\colortbl;\red0\green0\blue128;}{\fonttbl{\f0
\fcharset0\fnil Courier;}}\plain\cf1\fs20 \pard Length of wire (in.)}
.EQN 0 37 21 0 0
{0:X}NAME:2.000
.TXT 4 -37 22 0 0
Cg a23.250000,23.250000,37
{\rtf\ansi \deff0{\colortbl;\red0\green0\blue128;}{\fonttbl{\f0
\fcharset0\fnil Courier;}}\plain\cf1\fs20 \pard Separation between 
wire\par centers (in.)}
.EQN 0 37 23 0 0
{0:S}NAME:.038
.TXT 6 -37 24 0 0
Cg a28.250000,28.250000,28
{\rtf\ansi \deff0{\colortbl;\red0\green0\blue128;}{\fonttbl{\f0
\fcharset0\fnil Courier;}}\plain\cf1\fs20 \pard Relative dielectric constant}
.EQN 0 37 25 0 0
{0:er}NAME:2.5
.TXT 6 -39 26 0 0
Cg a29.500000,29.500000,29
{\rtf\ansi \deff0{\colortbl;\red0\green0\blue128;}{\fonttbl{\f0
\fcharset0\fnil Courier;}{\f1\fcharset2\fnil Symbol;}}\plain\cf1\fs20 
\pard Characteristic impedance ({\f1 W}):}
.EQN 4 9 27 0 0
{0:ZTWIST}NAME({0:D}NAME,{0:S}NAME,{0:er}NAME)={0}?_n_u_l_l_
.TXT 6 -9 28 0 0
Cg a21.250000,21.250000,21
{\rtf\ansi \deff0{\colortbl;\red0\green0\blue128;}{\fonttbl{\f0
\fcharset0\fnil Courier;}}\plain\cf1\fs20 \pard Total inductance (H):}
.EQN 4 9 16132 0 0
{0:LTWIST}NAME({0:D}NAME,{0:S}NAME,{0:X}NAME)={0}?_n_u_l_l_
.TXT 4 -9 30 0 0
Cg a18.250000,18.250000,18
{\rtf\ansi \deff0{\colortbl;\red0\green0\blue128;}{\fonttbl{\f0
\fcharset0\fnil Courier;}}\plain\cf1\fs20 \pard Same result in nH:}
.EQN 5 9 16133 0 0
{0:LTWIST}NAME({0:D}NAME,{0:S}NAME,{0:X}NAME)*(10)^(9)={0}?_n_u_l_l_
.TXT 4 -9 32 0 0
Cg a23.250000,23.250000,23
{\rtf\ansi \deff0{\colortbl;\red0\green0\blue128;}{\fonttbl{\f0
\fcharset0\fnil Courier;}}\plain\cf1\fs20 \pard Inductance per in. (H):}
.EQN 4 9 16134 0 0
{0:LTWIST}NAME({0:D}NAME,{0:S}NAME,1)={0}?_n_u_l_l_
.TXT 8 -9 34 0 0
Cg a22.250000,22.250000,22
{\rtf\ansi \deff0{\colortbl;\red0\green0\blue128;}{\fonttbl{\f0
\fcharset0\fnil Courier;}}\plain\cf1\fs20 \pard Total capacitance (F):}
.EQN 4 9 16135 0 0
{0:CTWIST}NAME({0:D}NAME,{0:S}NAME,{0:er}NAME,{0:X}NAME)={0}?_n_u_l_l_
.TXT 4 -9 36 0 0
Cg a18.250000,18.250000,18
{\rtf\ansi \deff0{\colortbl;\red0\green0\blue128;}{\fonttbl{\f0
\fcharset0\fnil Courier;}}\plain\cf1\fs20 \pard Same result in pF:}
.EQN 5 9 16136 0 0
{0:CTWIST}NAME({0:D}NAME,{0:S}NAME,{0:er}NAME,{0:X}NAME)*(10)^(12)={0}?_n_u_l_l_
.TXT 4 -9 38 0 0
Cg a24.250000,24.250000,24
{\rtf\ansi \deff0{\colortbl;\red0\green0\blue128;}{\fonttbl{\f0
\fcharset0\fnil Courier;}}\plain\cf1\fs20 \pard Capacitance per in. (F):}
.EQN 4 9 16137 0 0
{0:CTWIST}NAME({0:D}NAME,{0:S}NAME,{0:er}NAME,1)={0}?_n_u_l_l_
.TXT 28 22 40 0 0
Cg a4.250000,4.250000,4
{\rtf\ansi \deff0{\colortbl;\red0\green0\blue128;}{\fonttbl{\f0
\fcharset0\fnil Courier;}}\plain\cf1\fs20 \pard C.21}