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U8903A User’s Guide
Appendixes
Appendix C: User-defined Filter File Format
Pressing
Custom
in either the low pass, high pass, or
weighting filters section enables you to upload a
user- defined filter file via the File Manager.
The available user- defined filter types are Infinite Impulse
Response (IIR) and Finite Impulse Response (FIR). You need
to specify the coefficients or sections as well as group delay
for the respective filter type. Use the following examples to
configure the filter file format. The file is saved in the *.juf
format.
Example of the FIR filter file format:
#Type: FIR
#Delay: 10
#Coefficients: [0.001, 0.002, 0.003, 0.004, 0.005]
The coefficients of the FIR filter are described as follows.
0.001 // A[0]
0.002
// A[1]
0.003 // A[2]
0.004
// A[3]
0.005
// A[4]
N O T E
The FIR filter transfer function,
H
(
z
), is defined as:
H(z) = A[0] + A[1]z
–1
+ A[2]z
–2
+ A[3]z
–3
+ ...
where z = complex variable
Summary of Contents for u8903a
Page 1: ...Agilent Technologies Agilent U8903A Audio Analyzer User s Guide...
Page 12: ...XII U8903A User s Guide...
Page 20: ...XX U8903A User s Guide...
Page 22: ...XXII U8903A User s Guide...
Page 38: ...16 U8903A User s Guide 1 Getting Started...
Page 74: ...52 U8903A User s Guide 2 Operation and Features...
Page 90: ...68 U8903A User s Guide 3 Instrument Configuration...
