Filters
1/1 octave filters:
0,5 Hz 16 kHz (wide frequency selection), or 8 Hz 16 kHz (normal selection)
1/3 octave filters:
0,4 Hz 20 kHz (wide frequency selection), or : 6,3 Hz 20 kHz (normal selection).
Filter type:
Class 1, digital IIR filters, base 10 system, aaccording to IEC 61260. Use of filters require
that appropriate options are installed.