Drawmer THREE-SUM Посібник оператора - Сторінка 4

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The THREE-SUM is designed for standard 19" rack

mounting and occupies 1U of rack space. Avoid mounting

the unit directly above power amplifiers or power supplies

that radiate significant amounts of heat. Always connect

The inputs and outputs are electronically balanced on conventionally wired XLRs (pin 1 screen, pin 2 hot, pin 3 cold and

XLR shell is connected to chassis). The operating level is nominally +4dBu. Balanced use is recommended.

• Interference:

If the unit is to be used where it maybe exposed to

high levels of disturbance such as found close to a TV

or radio transmitter, we advise that the unit is oper-

ated in a balanced configuration. The screens of the

signal cables should be connected to the chassis con-

nection on the XLR connector as opposed to connect-

ing to pin1. The Three-Sum conforms to the EMC

standards.

INSTALLATION

AUDIO CONNECTIONS

fig.1 TYPICAL THREE-SUM SETUP

DRAWMER T

HREE

SUM

the mains earth to the unit. Fibre or plastic washers may

be used to prevent the front panel becoming marked by

the mounting bolts.

• Ground Loops:

If ground loop problems are encountered, never dis-

connect the mains earth, but instead, try disconnect-

ing the signal screen on one end of each of the cables

connecting the outputs of the Three-Sum to the

patchbay. If such measures are necessary, balanced

operation is recommended.

PERATOR'S

ANUAL