User`s manual

Description of controls is as follows:

Cutoff Specifies frequency in Hertz above which all

Frequency: signals are attenuated. Frequencies below this cutoff are unaffected. Minimum

Cutoff Frequency is 100 Hz, while the maximum Cutoff Frequency depends

upon the System Bandwidth setting. Cutoff Frequency can be adjusted in 1 Hz

steps.

Stopband Specifies amount in dB by which frequencies

Attenuation: above the Cutoff Frequency are ultimately attenuated. Stopband attenuation is

adjustable from 10dB to 60dB in 1 dB steps.

Transition Specifies slope at which frequencies above

Slope: the Cutoff Frequency are rolled off in dB per octave. Sharpest roll off occurs

when Transition Slope is set to maximum, while gentlest roll off occurs when

Transition Slope is set to minimum. Sharp rolloffs may cause the voice to

sound hollow but will allow more precise removal of high frequency noises.

Note that the indicated value changes depending upon the Cutoff Frequency

and System Bandwidth settings.

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.

NOTE: The Filter Active button is equivalent to, and linked with, the Active

button in the associated Filter block on the Master Control Panel.

OK Button: Use either this button or the “X” button at the upper right corner of the

window to exit the dialog and return to the Master Control panel.

A graphical description of the lowpass filter and its controls is given in Figure 4-20.

Figure 4-20 Lowpass Filter Graphical Description