Crown PIP-AMC Technické informace stáhnout pdf (Strana 8)

Macro-Tech 3600VZ Power Amplifier

Page 8

LEVEL LEVEL

OFF

ENABLECH1 CH2

ODEP

SIGNAL

IOC

A B CD DC B E F

Fig. 2.1 Front Facilities

2 Facilities

A. Dust Filter

The dust filters remove large particles from the air at

the air intake. Check filters regularly to be sure they do

not become clogged. The filter elements can be easily

removed for cleaning by gently pulling them away from

the front panel (see Sections 3.2 and 4.5).

B. Level Controls

The level for each channel is set with these convenient

controls mounted on the front panel. Each level control

has 31 detents for precise adjustment (see Section

4.4). A security option is available to prevent tamper-

ing (see Section 8.2).

C. Signal /

IOC

Indicators

The presence of an audio signal and the distortion level

of each channel is represented by these green multi-

function indicators. As signal presence indicators, they

flash with normal intensity in sync with the output audio

signal to indicate its presence. As

IOC

(Input/Output

Comparator) indicators, they compare the waveform

of the input signal to that of the output. They flash

brightly with a 0.1 second hold delay if there is a differ-

ence (or distortion) of 0.05% or more. Another

IOC

function is to indicate input overload. If the input signal

is too large the indicators will flash brightly (with a 0.5

second hold delay) to indicate input clipping distor-

tion.

Note: The Channel 2 IOC indicator will stay on in

Parallel-Mono mode

(refer to Section 4.2).

ODEP

Indicators

During normal operation of the Output Device Emula-

tion Protection circuitry, these indicators glow brightly

to show the presence of reserve thermodynamic en-

ergy. They dim proportionally as energy reserves de-

crease. In the event that energy reserves are depleted,

the indicators turn off and

ODEP

proportionally limits

output drive so the amplifier can safely continue to

operate even under severe conditions. These indica-

tors can also help to identify more unusual operating

problems (see Section 4.2).

E. Enable Indicator

This indicator lights when the amplifier has been “en-

abled” or turned on, and AC power is available (see

Section 4.2).

F. Enable Switch

Depress this push-button to turn the amplifier on or off.

When turned on, the output is muted for approximately

four seconds to protect your system from start-up tran-

sients. (This delay can be changed. Contact the Crown

Technical Support Group for details.)

G. Power Cord

All 120 VAC, 60 Hz North American units include a

NEMA TT30P plug. These units also include 30-amp

(10 AWG) line cord. Other units are equipped with a

power cord and plug that is appropriate for the voltage

requirements of the amplifier.

H. Stereo/Mono Switch

The three operating modes of this amplifier are

controlled by this switch. Stereo mode is available for

normal two-channel operation. Bridge-Mono mode is

available to drive a single load with an impedance

equal to or greater than 4 ohms. Parallel-Mono mode is

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