零极点分析问题！

请教牛人：spice零极点分析后得到的 “ constant factor = -86.5339x”是什么意思?、
pole/zero analysis
tnom=
25.000 temp=
25.000

******

input =
0:vin
output = v(out


input =
0:vin
output = v(out

poles (rad/sec)
poles ( hertz)
**********************************************************************
real
imag
real
imag
201.3967x
0.
32.0533x
0.

-264.0415x
0.
-42.0235x
0.

-17.3214g
0.
-2.7568g
0.

-17.6466g
0.
-2.8085g
0.

zeros (rad/sec)
zeros ( hertz)
**********************************************************************
real
imag
real
imag
-72.7926x
0.
-11.5853x
0.

-10.7470g
0.
-1.7104g
0.

156.8778g
0.
24.9679g
0.

***** constant factor =
-86.5339x
*****

还没太注意过这个问题哎