Agilent Technologies X Series Manual page 446

Input/Output
If we interpolate on a log scale, we assume that the line between the two points is a straight line on the
log scale. For example, let's say the two points are (2,4) and (20,1). A straight line between them on a log
scale looks like:
5
4
3
2
1
1
On a linear scale (like that of the spectrum analyzer), this translates to:
4
3
2
1
0 1 2 3 4 5
On the other hand, if we interpolate on a linear scale, we assume that the two points are connected by a
straight line on the linear scale, as below:
446
10
6 7 8 9 10 11
vsd17
100
12 13 14 15 16 17
vsd19
18 19 20