dbx AFS2, Owner'S Manual

11

 The User Interface & Connectors 

Front Panel

WIZARD

20

10

CLIP

3

0

SIG

CH 1

CH 2

INPUT

FILTERS

1

2

3

4

5

6

7

8

9

10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

CH 1

CH 2

BYPASS

SELECT

MENU / BACK

AFS WIZARD

      Configure Channel 2

      Configure as Stereo

      Configure Channel 1

1

2

3

4

5

6

7

1.  Input Level Meters w/Clip Indicator 

These LED meters show the incoming signal level of each channel and indicate when the input signal is clipping. Input 
level LEDs range from -28 dBu (SIG) to +22 dBu (CLIP). The below table shows the correlation between the input 
meter LEDs and signal level depending on the +4 dBu/-10 dBV switch position on the rear panel. 

Input LEDs (switch set to +4 dBu)

(switch set to -10 dBV)

CLIP

22 dBu

8 dBV

0

19.9 dBu

5.9 dBV

3

17 dBu

3 dBV

10

10 dBu

-4 dBV

20

0 dBu

-14 dBV

SIG

-28 dBu

-42 dBV

NOTE: 

AFS works best when the signal entering the AFS2’s inputs is sufficient. This requires proper gain staging 

between the mixer and AFS2. For maximum performance and proper operation, the average input signal level should 
consistently light the ‘20’ LED, with the ‘10’ LED lighting occasionally. If the signal level is too low, AFS may be slow 
to respond to feedback. See 

‘Gain Structure’ on page 6 

for further information on gain structure.

2.  LCD Display 

This LED backlit LCD display provides the visual cues necessary for navigating and operating the AFS2.

3.  MENU/BACK Button 

Pressing this button from the Information View Home Screen in Home Mode will enter the AFS2 menus. Pressing it 
from the Filter Plot Home Screen will return to the Information View Home Screen. Pressing it when in any menu will 
move back one level in the current menu hierarchy. Pressing it from the first screen in the menu hierarchy will return to 
Home Mode.

4.  DATA Wheel 

This encoder is used for making on-screen selections and editing parameters. Pressing this DATA wheel from Home 
Mode will also toggle between the two available Home Screens. One screen shows detailed information about each set 
filter (i.e., the width, attenuation amount, and set frequency) and the other displays a graphical representation of the set 
AFS notch filters. See 

‘Navigating & Modes Of Operation’ on page 14 

for further information on these Home 

Screens.