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AFS 224

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.

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.

Rear and Front Panels

Type

LED

Music High:

Red

Music Med:

Yellow

Music Low:

Green

Speech:

Not Lit

1/80th Octave

1/20th Octave

1/10th Octave

1/5th Octave

AFS 224 User Manual

Operation

Rear Panel

Front Panel