Allenheath Scepter USER GUIDE Bedienungsanleitung PDF herunterladen (Seite 22)

Audio Owner Manual

Section 3

USING THE SCEPTER SERIES MIXER

THE INPUT CHANNEL

The input channel accepts a balanced or unbalanced input signal from a

microphone, direct box or a line level source such as the output of a synthesizer, or

external signal processing device such as a digital delay line, reverb, etc.

Phantom Power

The SCEPTER Series Mixers are factory wired for the

+48

volt DC. phantom

powering of condenser microphones. When the master phantom power switch is on

and the individual channel phantom switch is on,

+48

volts is present at XLR pins 2

and 3. Power supplies

MPS8-R,

MPS8-P,

MPS9

and

RPSl

provide the necessary

voltage. The master phantom power pushbutton switch is located at the top of the

master section on the front panel. The individual channel phantom power on

switches are located on the rear panel above the MIC connectors and can be

activated with a pencil or similar object.

NOTE: When using phantom power it is important to avoid connecting an

UNBALANCED signal source to the MICROPHONE input without having

first switched off the phantom power to that channel.

Input Gain Control

The input gain control is used to vary the gain of the ‘input preamp. Control

range is

+2dB

+66dB

for MIC and

-2OdB

+44dB

for LINE. These figures

include the effect of the PAD switch.

Line Switch

When depressed, this switch selects the Balanced Line Input

(l/4”

stereo

jack). as the source for the Channel. The Balanced Mic input (3 pin XLR) is

selected when the switch is in the UP position.

Input Pad Switch

On occasion, situations may arise where high level signal sources (a live kick

drum, or some drum machines and synths) overload the input channel, even though

the input gain control is set at minimum. Engaging the PAD switch reduces the

incoming mic or line signal by

16dB.

Should the amount of attenuation prove to be

excessive, the input gain control can be raised to bring the signal level up to the

desired level. The PFL system can be very useful here, and should be employed to

set channel gain to the proper level.

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