Drawmer DA 6 Посібник оператора - Сторінка 3

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INSTALLATION

The DA6 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 mains earth to the unit. Use fibre or plastic washers to

prevent the front panel becoming marked by the mounting bolts.

AUDIO CONNECTIONS

Input and Output audio connections are provided via balanced XLRs at a level of +4dBu. This

applies to both inputs and outputs. The wiring convention being: Pin 1 Ground; pin 2 Hot; and

pin 3 Cold. For use with unbalanced systems, the Cold pin 3 must be grounded at both input

and output inside the XLR connectors.

The Stereo Link Outputs are balanced 1/4" (TRS) jack sockets, where Tip connection is Hot;

Ring is Cold; and Sleeve is Ground. These connections are offered for chaining multiple DA6

units if there is a requirement for more than 6 stereo outputs.

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 suggest that the unit be operated using an optional wiring

of the 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 DA6 fully

conforms to the EMC standards.

GROUND LOOPS

If ground loop problems are encountered, never disconnect the mains earth, but instead, try

disconnecting the signal screen on one end of each of the cables connecting the outputs of the

MX40 to the patchbay. If such measures are necessary, balanced operation is recommended.

ISOLATION TRANSFORMERS

The DA6 has the capability of being isolated at its outputs using low impedance (600 )

balanced transformers. Each output can be individually isolated, and it is possible to have

mixed configurations where some outputs retain their default connection of electronically

balanced. Isolating transformers can be factory fitted, or alternatively, retro fitted by a Drawmer

appointed service agent, or a suitably qualified engineer. The isolating transformer is

manufactured by Beyer (Gmbh) and has a part reference TR/BV310-101-031. The part

reference from Drawmer stock is #6105. Any warranty will be void if isolating transformers are

fitted by non-approved methods, or, if unspecified transformers are fitted.

MONITOR HEADPHONES

For the purposes of monitoring each output, a stereo 1/4" (TRS) jack socket is offered on the

front panel. This having the standard wiring convention of Tip being Left; Ring being Right; and

Sleeve being common Ground. This output is capable of driving headphones with an

impedance between 8 and 600 . The amplifier has an output of approximately 1Watt. Caution is

required when operating at high output levels with low impedance headphones.

POWER CONNECTION

The DA6 unit will have been supplied with a power cable suitable for domestic power outlets in