dbx Pro AFS 224 user manual Rear and Front Panels, Rear Panel

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AFS 224

Rear and Front Panels

Operation

Rear Panel

AFS 224 Rear

Power Cord Receptacle: Connects AC power to the AFS 224.

Input Connectors: Two types of input connectors are provided for input connections: female locking XLR type connectors, and 1/4” tip-ring-sleeve phone jack connectors. The maximum input level that the processor can accept is +20dBu (ref: 0.775Vrms).

Operating Level Switch: This button allows you to select between either +4dBu or -10dBV nominal operating level.

Output Connectors: Two types of output connectors are provided for output connec-

tions: male XLR type connectors, and 1/4” tip-ring-sleeve phone jack connectors.

Front Panel

AFS 224 Front

Input Level Bar Graph: These four LEDs indicate input level of the AFS 224. Input level LEDs range from -10 to +18dBu.

IMPORTANT - For maximum performance and proper operation, the average input sig- nal should consistently light the 0 dBu LED, with the +10 dBu LED occasionally lighting.

Clip LED: This LED indicates that there is signal clipping at the input.

Bypass: This button bypasses the notch filters in the signal path by pressing once. Pressing and holding the Bypass button is used to reset the filters. For more information regarding filter reset, please see the Clearing Filters in the User Setup Section.

Type: This button is used to select the AFS type and to link Channel A and Channel B. The AFS 224 offers several feedback suppression types, which are Speech, Music Low, Music Medium and Music High. Each selected Type controls the width of the notch filter used to remove the feedback. MUSIC HIGH uses very narrow notch filters minimiz- ing the effect on the music, whereas the SPEECH type uses much wider notch filters allow- ing the AFS 224 to work faster. The Type, LED color and Frequency Q are listed below and a representative filter Q graph is shown on the next page.

Type

LED

Q

Music High:

Red

1/80th Octave

Music Med:

Yellow

1/20th Octave

Music Low:

Green

1/10th Octave

Speech:

Not Lit

1/5th Octave

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AFS 224 User Manual

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Contents AFS Important Safety Instructions Electromagnetic Compatibility AFS Table of ContentsAFS 224 Operation Introduction Defining the AFSAFS 224 Advantage Warranty Service Contact InfoOperation Installation / Connections Installation RecommendationsBasic Connection of the AFS Rear and Front Panels Rear PanelFront Panel User Setup Setting Gain StructureLift Time User Setup Operation Setup ModeUsing Fixed mode Using Live Mode Using Types in Fixed modeRinging out a system Other Functions Clearing Filters Fixed and LiveApplication Guide ApplicationsApplication 1 Insert On the Microphone Channel Output to Speaker Application 3 Insert on the Subgroups of a Mixer Applications GuideApplication 4- Connected Inline with the Outputs of a Mixer Block diagram Operation Block DiagramSpecifications Harman International Company