Measurements
are made at five points on the graph in such a way that two of the points are
before the splice, two beyond, and the fifth in front of and close to the
splice.
A line
Y1=a1x+b1 is drawn through the first two points before the splice and a second
line Y2=a2x+b2 is drawn through the points beyond the splice.
The splice
loss at x, is thus :
A
(x2)=y1=y2=x3(a1-a2)+(b1-b2)
The
calculation shown above is done by a microprocessor-based program and the value
of the equation is displayed on video screen.
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