dbx 786 Посібник користувача - Сторінка 10

Переглянути онлайн або завантажити pdf Посібник користувача для Підсилювач dbx 786. dbx 786 16 сторінок. Precision mic preamp

Operating

Rear Panel

Au dio Input and Output Connectors

Each audio input connector on the rear panel of the 786 is a gold-plated Neutrik® XLR female connec-

tor. The no-compromise approach to the 786 required that we use gold-plated connectors, due to their

high conductivity and resistance to corrosion. The connectors are default wired in

2 hot, AES convention), although supplying an unbalanced signal presents no difficulty to the 786, (by

grounding pin 3).

Un balance Switch

The Unbalance switch is associated only with the Output connectors of the 786. When it is in the IN

position, the output of the 786 is switched from balanced to unbalanced. (See Figure 5 on page 9.) In

the OUT position, the 786's outputs are balanced in the "pin 2 hot" configuration. Note that when the

output is unbalanced via the switch, there is a 6dB drop in output signal level, and the meter is still cal-

ibtrated for a balanced signal.

Ground Switch

The Ground switch, when in the IN position, references the center tap of the output transformer to the

chassis ground. The combination of the two switches associated with the audio output connectors

ensures that the 786 is versatile enough to interface with any equipment and can deliver clean audio to

the output, free of hum and interference. (See the Figure 5 for details of the Ground switch operation.)

Chassis Ground Binding Post (

The green Chassis Ground binding post is supplied to give the user another method to provide com-

prehensive grounding options for any installation. It is easy to think of the binding post as being syn-

onymous with the ground pin on any AC power cord. (The ground pin on an AC cord should NEVER

be removed, shorted out, or "lifted".) The post allows the chassis ground to be connected to another

ground source if desired. (ie: a chassis ground system provided by another piece of gear) Wire may be

connected to the binding post by securing the stripped end of the wire through the hole in the post,

located under the hardened plastic nut-top of the post. Access to the hole is gained by unscrewing the

top part of the post far enough to reveal the hole underneath. Insert the stripped end of the wire and

tighten the top (nut) part of the binding post to secure the connection.

Signal Ground Binding Post ( )

The black Signal Ground binding post is located next to the Chassis Ground binding post, and works

in much the same way, providing comprehensive grounding options for any installation. Some systems

are built on a "star" grounding principle, where all the signal grounds are brought directly to one cen-

tral point and grounded to earth at the same location. The Signal Ground binding post allows easy

access to the signal ground system of the 786 without having to remove the cover of the 786 and locate

a good place to take the signal ground out of the box.

controls

786

)

MANUFACTURED UNDER THE FOLLOWING U.S. PATENTS:

4,368,425 5,282,252. OTHER PATENTS PENDING.

BALANCED

mode (pin