User`s manual

button after any change in System Bandwidth or Input Mode in order to

rebuild the filter.

Stopband Control: Used to specify the dB attenuation to be applied in between the slots currently

implemented. However, unlike the Slot Freq and Width controls, the Stopband

control is fully interactive and has instantaneous effect at all times; clicking the

Build button is not necessary for the Stopband control to have effect. Range of

adjustment is 0 to -90.3dB.

Clear All Button: Clears all Slot Freq and Slot Width settings for all 16 notches and restores the

Multiple Slot filter coefficients to an allpass filter (no slots).

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.

Set for DTMF Button: This button will set the first eight notches to each of the eight specific DTMF

tones. This is useful for isolating the tones in a telephone call. After the button

is clicked the filter must be rebuilt.

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 Multiple Slot filter and its controls follows in Figure 4-36.

Figure 4-36 Multiple Slot Filter Graphical Description