Apogee DLC24 Spezifikationen PDF herunterladen (Seite 10)

Output Signal Connection

The DLC24 has four balanced 3-pin XLR male output connectors for output

signal connection.Pin1 is “ground”, Pin 2 is signal “+”, and Pin 3 is signal “-”.

Output function and channel/input assignment is determined by the

configuration file uploaded into the controller. Refer to:

DLC24 Speaker Configuration Software

(page 12) for more information.

Note: Bi-amped speakers will use two outputs and

tri-amped speakers will use three outputs.

Amplifier Voltage Sense Returns

The amplifier’s output voltage is monitored by the DLC24 via the pluggable

screw terminals mounted on the rear of the controller. These are the

AMPLIFIER SENSE RETURNS and are labeled 1 through 4, corresponding

to the respective DLC24 signal outputs. When the DLC24 senses a

voltage that could damage the speaker, it

engages protective limiters

to prevent speaker driver damage. Complete speaker protection is not

available without this connection.

Proper Grounding & Elimination of

Ground Loops

The proper grounding of any audio system is important in order to maximize

the signal-to-noise ratio and ensure safety. Often, simply connecting the

unit to the system with the proper balanced

cables will be all that is required.

However, certain interconnections may result in objectionable

levels of hum at

power line fundamental frequencies and/or related harmonics due to

multiple ground paths, often called “ground loops”.

Ground loops can most commonly be eliminated by reducing the number

of paths to earth ground within a system. The DLC24

provides switches

in two places, allowing for isolation from earth ground.

First is the Input Shield Pin 1 lift switch located at the rear of the unit near

the XLR inputs. This switch “lifts” or “floats” the shield of both signal input

XLR connectors from chassis ground

. Normally, balanced cable shields

are connected to earth ground via the equipment at both ends. In case of a

ground loop, it is typical practice to keep the shield connected at the

source (so as not to defeat the purpose of the shield).

Second is the Signal Ground lift switch located at the rear of the unit near

the AC inlet. This switch “lifts” or “floats” DLC24’s power supply ground with

respect to chassis ground.

The Input Shield Pin 1 lift and Signal Ground lift switch may be used

individually or together. Additionally, most audio equipment has a ground

lift of some type. Any combination of ground lifts on the DLC24 and

other equipment can be used to reduce or eliminate ground hum and will

not create a safety hazard.

Note: The output’s Pin 1 are always tied to chassis ground

regardless of the setting of these switches.

Connections

CONTROL

INPUT

FRONT

REMOTE

ANALOG

DIGITAL

RESET

TX-

TX+

RX-

RX+

TX-

TX+

RX-

RX+

TX-

TX+

RX-

RX+

Pin 3: –

Pin 1: Ground

Pin 2: +

OUT 1OUT 1 OUT 2OUT 2 OUT 3OUT 3 OUT 4OUT 4

1 1

2 2

3 3

1 1

2 2

3 3

123 4

AMP SENSE RETURNS

CONTROL

INPUT

FRONT

REMOTE

ANALOG

DIGITAL

RESET

TX-

TX+

RX-

RX+

TX-

TX+

RX-

RX+

TX-

TX+

RX-

RX+

CONTROL

INPUT

FRONT

REMOTE

ANALOG

DIGITAL

RESET

TX-

TX+

RX-

RX+

TX-

TX+

RX-

RX+

TX-

TX+

RX-

RX+

CONTROL

INPUT

FRONT

REMOTE

ANALOG

DIGITAL

RESET

TX-

TX+

RX-

RX+

TX-

TX+

RX-

RX+

TX-

TX+

RX-

RX+

XLR Male

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 31 32

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