Operation Manual

LCD MENU STRUCTURE

cancellation. The default is 10 dB.

Noise Cancellation Level (Inputs 1-8). Selects the amount of noise cancel-

lation. This ranges from 0 to 15 dB.

Phantom Power. Use this parameter to turn phantom power On or Off for inputs

1-8.

Echo Canceller Reference. This parameter decides which reference is associ-

ated with which zone. Choose between R

EF1, REF2, or the external bus reference.

AEC Suppression. Sets the amount of double talk suppression used in the AEC.

The values correspond to the following settings: 1 = No Suppression, 2 = Light Sup-

pression, 3 = Heavy Suppression, 4 = Half-Duplex.

UTPUTS

The OUTPUT menu contains GAIN, NOM ACTIVE, and MUTE. As with the INPUT

menus, this is done on a per channel basis including the W, X, Y, and Z busses.

Output Gain. Choose the gain applied to each output signal using this parameter.

The default setting is 0 dBu. Though the EF2280 allows for positive output gain,

you should always try to adjust input gains to a good level so that the output gain is 0

dB. If you find that you need a positive output gain from the EF2280, first check your

input gain to make sure you are getting a good level (around 0dB). Keep the output

gain at around 0 dBu. Then, for the best gain structure, use your amplifier to raise the

volume in your system.

Mute Output. Use this to mute or unmute each Output.

NOM Active. This allows you to select whether the NOM attenuator is active for

a particular output channel (Outputs 1-8, A-D). The NOM attenuator will attenuate

the output signal by 10*log

(NOM) where NOM is the number of open microphones

in that particular output channel. NOM is calculated based on the number of open

microphones for each signal that is in the output, including the W or X bus which

carry NOM information. This option is not valid on Outputs W, X, Y, Z, or the EF

Bus reference (you cannot apply NOM attenuation to these busses).

Output Delay. This allows you to add delay to the output. The default value is 0.

The range of values is 0 to 340.0 ms in 0.1 ms increments.

Figure 22. EF2280

Outputs submenu

Outputs

Mute Output

NOM Attenuation

On/Off

Output Gain

Output Delay