Drawmer 1978 Manual do operador - Página 4

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1. Specification

The 1978 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 and always connect the mains

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 operated

in a balanced configuration. The screens of the signal

cables should be connected to the chassis connection

on the XLR connector as opposed to connecting to

pin1. The 1978 conforms to the EMC standards.

SIDE CHAIN

The external side chain feature on the 1978 is part of the compressor feedback stage and would normally be connected

to a normalised or semi-normalised pair of patchbay contacts. This would allow the user to insert EQ in addition to the

Tonal shaping on the front panel for some de-essing, or frequency conscious compression. The side-chain access point

is unbalanced, connection is via stereo 1/4" jacks, the wiring convention being: ring is signal send, tip is signal return

and sleeve ground.

INSTALLATION

earth to the unit. Fibre or plastic washers may be used to

prevent the front panel becoming marked by the mounting

bolts. It is also advisable to leave space above the unit to

allow the heat to dissipate.

AUDIO CONNECTIONS

• Ground Loops:

1978 CONNECTOR WIRING

DRAWMER 1978 O

PERATOR'S

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 1978 to the patchbay. If

such measures are necessary, balanced operation is

recommended.

ANUA