Keysight U8903B - Page 562

A Appendixes
562 Keysight U8903B User’s Guide
Example of an IIR filter file format is as follows.
#Type: IIR
#Delay: 250
#Sections:
0.02188812
1
-1.852219
0.9397715
1
2
1
0.02067037
1
-1.749171
0.8318526
1
2
1
…
The coefficients of the IIR filter are described as follows.
0.02188812 //Section 1: Gain1
1 //Section 1: A1[0]
–1.852219 //Section 1: A1[1]
0.9397715 //Section 1: A1[2]
1 //Section 1: B1[0]
2 //Section 1: B1[1]
1 //Section 1: B1[2]
[0.02067037 //Section 2: Gain2
1 //Section 2: A2[0]
–1.749171 //Section 2: A2[1]
0.8318526 //Section 2: A2[2]
1 //Section 2: B2[0]
2 //Section 2: B2[1]
1 //Section 2: B2[2]
where Ax = Denominator and Bx = Numerator