User`s manual

32
0.0008975
Scientific notation is in the form:
mantissaE[+-]exponent
The following are some examples of floating point coefficients in scientific format:
3.25E-003 = 0.003250
5.36E-2 = 0.0536
1.25E-004 = 0.000125
8.1234E2 = 812.34 (clipped to +1.0 by the MicroDAC IV software)
Only one coefficient may be located on a line. The coefficients can be comma-separated, but must still
be stored on to a line. The MicroDAC IV only uses the maximum number of coefficients available for
each stage. If a file contains more than this number of coefficients those remaining are ignored.
Conversely if a file contains less than the maximum number of available coefficients the remaining
coefficients are set to zero. If the coefficient file is not set in the correct format the MicroDAC IV software
will not load the file and a popup message box will inform the user.
When the Imported Coefficient File is first selected, its default coefficients are set up as a digital bypass.
Once a valid coefficient file is loaded, its data becomes part of the MicroDAC IV configuration, which can
be stored in a settings file for later retrieval without the need of the original coefficient file.
NOTE: Keep in mind that the sample frequency will affect the results of the filter. The floating point filter
coefficients are normally set up using a specific sampling frequency. If the coefficients are used in a filter
with a different sampling frequency the filter will be skewed. The sample frequency of the MicroDAC IV is
12000Hz.
Below is an example coefficient file containing 53 filter coefficients:
4.387280E-003
1.262311E-002
7.795490E-003
-5.957981E-003
-1.444848E-002
-7.919611E-003
7.957611E-003
1.674714E-002
8.028165E-003
-1.060535E-002
-1.978514E-002
-8.120655E-003
1.430844E-002
2.407519E-002
8.196839E-003
-1.991908E-002
-3.074622E-002
-8.256326E-003
2.956892E-002
4.286449E-002
8.298883E-003
-5.050633E-002
-7.269745E-002
-8.324551E-003
1.334762E-001
2.797442E-001
3.416667E-001
2.797442E-001
1.334762E-001
-8.324551E-003