Bosch LBB 1968 Manual de usuario descargar pdf (Pagina 23)

50 | Plena Range

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Communication

LBB 1970/00 Plena BGM/Paging

System

The Plena BGM/paging system is the versatile all-in-one solution

to cover all needs for background music (BGM), making

announcements and paging people. This high-performance yet

affordable unit is very easy to install and operate.

It is typically used in shops, supermarkets, restaurants, bars,

schools, canteens, gymnasiums, garages and other places

where BGM creates the right atmosphere and also where

amplified speech needs to be clearly heard.

Features

• All-in-one solution for background music and paging

• CD-player for audio and MP3 CD/CD-R

• FM/AM tuner with 15 presets and digital control

• Dual-zone 120 W mixer amplifier with volume control per zone

• Selectable priority and VOX switching on microphone input 1

• Optional 2-tone chime to precede announcements

Functions

CD Player

This unit has a CD-player that plays audio CDs and CD-Rs with

MP3-encoded files. It has mono operation in accordance with

public address needs and allows for a whole day of high-quality

uninterrupted music playback from a single MP3-disc. Music

may be organized on a disc in multiple folders for music

selections for different occasions.

FM/AM Tuner

The digitally controlled FM/AM tuner uses a frequency

synthesizer for accurate capture of radio stations and has 10

presets for each waveband to store favorite programs. An

auxiliary (music) input and tape output are provided for

connecting external equipment like a DVD-player or cassette

deck.

Microphone Inputs

The announcement part of the unit has 3 balanced microphone

inputs. Microphone input 1 has a DIN socket on the rear for a

priority microphone (e.g. the LBB 1950/00) with selectable

priority, 2-tone chime to precede a priority announcement,

speech filter and phantom power, and a phone jack input on the

front for a dynamic microphone (e.g. the LBC 2900/15) with

selectable VOX activation. Presets are provided for adjusting the

music ducking level and the volume of the chime. Microphone

inputs 2 and 3 have XLR sockets with selectable phantom

power, and are mixed with the BGM. All microphone inputs and

the music source have their own volume control, with a shared

bass and treble tone control and a shared master volume

control.

Outputs

The powerful 120 W output section has two transformer-isolated

100 V constant voltage outputs for driving 100 V-loudspeakers

in two separate zones. The 100 V-technique reduces line losses

on longer distances and allows for easy parallel connection of

multiple loudspeakers. Both zones may be individually selected

from the front panel, and the output level in each zone can be

individually set. Each zone also has a low-voltage output for

connection to 8 Ohm transformerless loudspeakers (e.g.

consumer-type loudspeakers). A separate 100 V Call Only

output is provided for addressing an area where BGM is not

required but where priority announcements are. A voltage-free

Call Active contact is available for overriding local volume

controls during priority calls or other purposes. A LED VU-meter

monitors the output.

Parts Included

Certifications and Approvals

Quantity Component

1 LBB 1970/00 PLENA BMG/Paging System

EMC emission acc. to EN 55103-1

EMC immunity acc. to EN 55103-2

Safety acc. to EN 60065

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Bosch LBB 1968 Manual de usuario Pagina 23

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