Test with a cable in 100 sections of 50 Ohm  5 uFd
*
.WIDTH IN=72 OUT=80
.OPT NODE
*
*
* Sweep the input voltage from 0.01 Hz to 1 Hz in 100 steps.
*
.AC LIN 100 0.01Hz 1Hz
*
*
* Voltage Source 1 Ohms
*
VIN 123 0 AC 1
RS1 123 1 1
*
*
*  1st Section
*
R1  1  2     50
C1     2  0   5UF
*
*
*
*  2nd Section
*
R2  2  3     50
C2     3  0   5UF
*
*
*
*  3rd Section
*
R3  3  4     50
C3     4  0   5UF
*
*
*
*  4th Section
*
R4  4  5     50
C4     5  0   5UF
*
*
*
*  5th Section
*
R5  5  6     50
C5     6  0   5UF
*
*
*
*  6th Section
*
R6  6  7     50
C6     7  0   5UF
*
*
*
*  7th Section
*
R7  7  8     50
C7     8  0   5UF
*
*
*
*  8th Section
*
R8  8  9     50
C8     9  0   5UF
*
*
*
*  9th Section
*
R9   9  10     50
C9      10  0   5UF
*
*
*
*                    10th Section
*
R10  10  11     50
C10      11  0   5UF
*
*
*                    11th Section
*
R11  11  12     50
C11      12  0   5UF
*
*
*                    12th Section
*
R12  12  13     50
C12      13  0   5UF
*
*
*                    13th Section
*
R13  13  14     50
C13      14  0   5UF
*
*
*                    14th Section
*
R14  14  15     50
C14      15  0   5UF
*
*
*                    15th Section
*
R15  15  16     50
C15      16  0   5UF
*
*
*                    16th Section
*
R16  10  11     50
C16      11  0   5UF
*
*
*                    17th Section
*
R17  10  11     50
C17      11  0   5UF
*
*
*                    18th Section
*
R18  10  11     50
C18      11  0   5UF
*
*
*                    19th Section
*
R19  10  11     50
C19      11  0   5UF
*
*
*                    20th Section
*
R20  10  11     50
C20      11  0   5UF
*
*
*
*
*
* Load  1 Meg Ohm
*
RP1 12 0 1MEG
*
*
.PRINT AC VM(12,0) VP(12,0)
.PLOT  AC VM(12,0) VP(12,0)
*
.END