dbx AFS 224 Manuel de l'utilisateur - Page 13

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AFS 224

D-1 Using Live Filter Lift

Live Filter Lift provides maximum sonic integrity by removing unnecessary feedback filters.

The Live Filter Lift function provides a timer for each of the Live Filters. This timer length can

be adjusted by pressing the <LIVE FILTER LIFT> button, and can be switched between off,

1 minute, 10 minutes or 60 minutes. The filter lift default time is 10 minutes from the facto-

ry. If Live Filter Lift is on, once a filter's time period has expired, the AFS algorithm will check

to see if the feedback filter is still necessary. If no longer needed, the notch filter will then

slowly lift. If the filter is still required to eliminate feedback, the timer will be reset. If the

Live Filter Lift is off, the notch filters will remain in place until they are cleared, or until need-

ed for other frequencies.

D-2 Using Types in Live Mode

As in Fixed Mode, the AFS 224 offers several feedback suppression types. These types con-

trol the width of the notch filter used to remove the feedback. The Speech type uses wider

notch filters allowing the AFS 224 to work faster. The Music types provide sharper notch fil-

ters than the Speech type, with up to 1/80th of an octave in the Music High type (see AFS fil-

ter Q graph on the previous page). Pressing the <TYPE> button switches between the dif-

ferent types. You can select different types for both Live and Fixed Mode.

E - Clearing Filters (Fixed and Live)

To clear the Live filters, press and hold the <BYPASS> button on the selected channel for approx-

imately two seconds. The currently assigned live filter LEDs will flash. If you wish to clear only

the Live filters, release <BYPASS> button at this time. If you wish to reset all filters, continue to

hold the <BYPASS> button an additional two seconds until all filter LEDs are flashing. At this

point, release the <BYPASS> button and all filters will be cleared.

F - Other Functions

The AFS 224 also offers the security feature of front panel lockout and the ability to link channels.

The following information provides instruction for both procedures.

F- 1 Front Panel Lockout

To lockout all access to the front panel of the AFS 224, press and hold the channel 1 <LIVE

FILTER LIFT> button until all of the filter LEDs light from outside to inside. To unlock the

front panel lockout, press and hold the channel 1 <LIVE FILTER LIFT> button until the LEDs

light from the inside to the outside.

F-2 Linking Channels

To link both channels, press and hold the Channel 1 <TYPE> button until all button LED's

blink will set the unit into LINKED mode. As feedback in either channel occurs, notch filters

will be placed in both channels to remove feedback. To unlink channels, press and hold the

channel 1 <TYPE> button. After the unit is unlinked, both channels will behave indepen-

dently.

User Setup

AFS 224 User Manual

Operation