Labgruppen LAB 1000 Bedienungsanleitung PDF herunterladen (Seite 3)

Introduction

Thank you for purchasing a LAB.GRUPPEN power amplifier. This manual contains important information on

operating your amplifier correctly and safely. Please take some time and read this manual to familiarize yourself

with the amplifier.

The front panel

Figure 1. Front panel

1. Carry/protection handle

Both handles can be used to carry the amplifier,

they also act as protection for the front panel. If so

desired they can be removed (by removing the

screws behind the front panel) for fixed installations,

or racks where the front covers are to shallow.

2. Input level attenuators

These controls are used to alter the signal level

entering the amplifier. They are calibrated in dB to

help set up active loudspeaker systems or cut down

unwanted noise from the input signal.

(See page 7).

3. Over temperature protect indicator.

This indicator is lit if the amplifier tries to

operate above its maximum operating

temperature(90

C). The indicator first comes on as a

warning to either turn down the input level or check

the cooling arrangements after which point the

amplifier will mute the input signal. When the

cooling fans have returned the output heat sinks to

the normal operating temperature the input signal is

unmuted.

4. VHF protection indicator

This indicator lights when constant signals,

above 20 kHz at full power, are present at the output

terminals. When this happens the input signal is

muted and the process cycles until the VHF signal is

no longer present. (See page 8).

5. Clip/limit indicator

This indicator tells when the amplifier output is

clipping or limiting. The two different states can be

told apart:

• When the clip limiter is engaged it flickers

briefly. (See page 8).

• When the clip limiter is not engaged it lights for

a longer period.

6. Fan grill filter.

A foam filter is located behind the front panel to

prevent dust entering the amplifier.

7. Power actuator

This is used to start the amplifier.

(See page 4 and 7)

The rear panel

Figure 2. Rear panel

1 2 3 4 5 6 7 8 9 10 11

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