User`s manual

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Upper Cutoff Specifies frequency in Hertz above which no
Frequency: signals are attenuated. Frequencies between this cutoff and the Lower Cutoff
Frequency are attenuated. Minimum Upper Cutoff Frequency is 10 Hz above
the Lower Cutoff Frequency, while the maximum Upper Cutoff Frequency
depends upon the System Bandwidth setting. Upper Cutoff Frequency can be
adjusted in 1 Hz steps.
NOTE: The Upper Cutoff Frequency can never be set lower than 10 Hz
above the Lower Cutoff Frequency.
Transition Specifies slope at which frequencies above
Slope: the Lower Cutoff Frequency and below the Upper Cutoff Frequency are
attenuated in dB per octave. Sharpest attenuation occurs when Transition
Slope is set to maximum, while gentlest attenuation occurs when Transition
Slope is set to minimum. Note that the indicated value changes depending upon
the Cutoff Frequency and System Bandwidth settings. Also, note that the
Lower and Upper Transition Slopes always have different values; this is
because the frequency width of an octave is proportional to Cutoff Frequency.
Stopband Specifies amount in dB by which frequencies
Attenuation: above the Lower Cutoff Frequency and below the Upper Cutoff Frequency are
attenuated. Stopband attenuation is adjustable from 10dB to 60dB in 1 dB
steps.
Filter Active Button: Used to switch the filter in and out of the process without affecting the
operation of the other filters. Button LED is illuminated RED when the filter is
in the process, and is not illuminated (GRAY) when the filter is out of the
process.
Figure 4-25 Bandstop Filter Control Window