Version 4
SHEET 1 936 680
WIRE 208 -32 160 -32
WIRE 336 -32 288 -32
WIRE 384 -32 336 -32
WIRE 528 -32 464 -32
WIRE 528 -16 528 -32
WIRE 160 48 160 -32
WIRE 384 48 192 48
WIRE -192 112 -320 112
WIRE -64 112 -112 112
WIRE 48 112 -64 112
WIRE 704 112 496 112
WIRE 848 112 704 112
WIRE -320 128 -320 112
WIRE 192 128 192 48
WIRE 192 128 160 128
WIRE 336 128 336 -32
WIRE 384 128 336 128
WIRE 496 128 496 112
WIRE 848 128 848 112
WIRE 384 176 160 176
WIRE 48 192 -48 192
WIRE 496 224 496 208
WIRE 608 224 496 224
WIRE 848 224 848 208
WIRE 848 224 608 224
WIRE -48 240 -48 192
WIRE 608 240 608 224
WIRE -320 256 -320 208
WIRE 160 288 160 256
WIRE -144 304 -208 304
WIRE 160 304 160 288
WIRE 160 304 -64 304
WIRE -208 336 -208 304
WIRE 384 336 384 256
WIRE -208 464 -208 416
FLAG -48 240 0
FLAG 384 336 0
FLAG 608 240 0
FLAG -208 464 0
FLAG 704 112 rx
FLAG 160 288 in
FLAG -64 112 tx
FLAG -320 256 0
FLAG 528 -16 0
SYMBOL ind2 512 224 R180
WINDOW 0 -33 78 Left 2
WINDOW 3 -35 32 Left 2
SYMATTR InstName L6
SYMATTR Value 1
SYMATTR Type ind
SYMBOL ind2 368 160 R0
SYMATTR InstName L5
SYMATTR Value 1
SYMATTR Type ind
SYMBOL res 192 -16 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 58 97 VBottom 2
SYMATTR InstName R1
SYMATTR Value 50
SYMBOL voltage -208 320 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value SINE(0 5 75000)
SYMBOL res -160 320 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R3
SYMATTR Value 50
SYMBOL voltage -320 112 R0
WINDOW 123 24 124 Left 2
WINDOW 39 0 0 Left 2
SYMATTR Value2 AC 1
SYMATTR InstName V1
SYMATTR Value SINE(0 5 50000)
SYMBOL res -96 96 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 50
SYMBOL ind2 32 96 R0
WINDOW 0 -40 37 Left 2
WINDOW 3 -33 78 Left 2
SYMATTR InstName L1
SYMATTR Value 1
SYMATTR Type ind
SYMBOL ind2 176 144 R180
WINDOW 0 36 80 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName L2
SYMATTR Value 1
SYMATTR Type ind
SYMBOL ind2 368 32 R0
SYMATTR InstName L3
SYMATTR Value 1
SYMATTR Type ind
SYMBOL ind2 176 272 R180
WINDOW 0 36 80 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName L4
SYMATTR Value 1
SYMATTR Type ind
SYMBOL res 832 112 R0
SYMATTR InstName R5
SYMATTR Value 50
SYMBOL res 368 -16 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R4
SYMATTR Value 1meg
TEXT -368 -144 Left 2 !.tran 1m
TEXT -368 -104 Left 2 !K1 L1 L2 L4 1
TEXT 40 496 Left 2 ;Twisted Pair Cable 50 Ohm
TEXT -24 -272 Left 4 ;Impedance matching with twisted Pair \ncharacteristic Impedance
TEXT 624 152 Left 2 ;Receive Path
TEXT -368 0 Left 2 ;Transmit Path
TEXT 216 416 Left 2 ;75kHz Signal in twisted pair
TEXT -368 32 Left 2 ;50KHz Signal in Transmit Path
TEXT 184 280 Left 2 ;V1
TEXT 192 0 Left 2 ;V2
TEXT -48 152 Left 2 ;V3
TEXT 560 152 Left 2 ;V4
TEXT -368 -184 Left 2 ;.ac dec 100 1k 100k
TEXT -368 -64 Left 2 !K2 L3 L5 L6 1
LINE Normal 96 256 96 48 2
LINE Normal 448 256 448 48 2