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Infra-red Receivers, Charging Units and Accessories | 29

Infra-red Receivers, Charging Units and Accessories

LBB 4540 Pocket Receivers

Features

X Specially-designed IC for maximum performance and a

long battery life time

X Recharging electronics integrated in the chip, ensuring

optimum charging performance

X 2-digit LCD display with battery and reception status

indication

X Number of available channels is always the same as the

number of channels in use by the system, eliminating the

need to scroll through unused channels

Introduction

These ergonomically designed receivers incorporate the

latest electronics technology - including a specially designed

IC - to ensure maximum performance and a long battery

lifetime. The receivers can be used for both language and

music distribution.

Functions

•

Audio signal automatically muted when signal is too low,

ensuring that the user receives only high quality audio

• Can be used with disposable batteries (2x AA alkaline

batteries, not included) or environmentally-friendly NiMH

rechargeable battery pack LBB 4550/00, (not included)

• No power used when headphone is disconnected

• Clip for easy wearing

• Measurement mode for easy checking of radiator

coverage

• Attractive and stylish design

• Up to 200 hours operation with alkaline batteries

• Up to 75 hours operation with battery pack

• Recharges from empty to full capacity within 1 hour and

45 minutes

Controls and Indicators

• 2-digit LCD display with channel number, battery and

reception status indication

• On/off button

• Volume control slide adjuster

• Channel selection up/down buttons

• Charging indicator LED

Interconnections

• 3.5 mm (0.14 in) stereo jack output socket for

headphones

• Battery contacts for use with AA alkaline batteries

• Connector for use with LBB 4550/00 battery packs

• Charging contacts on the left-hand side of the receiver for

compatibility with LBB 4560 charging units*

* LBB 3406, 3407, 3408 and 3409 charging units are

electronically incompatible with LBB 4540 Pocket Receivers,

and can actually damage them. The charging contacts on

LBB 4540 Pocket Receivers and LBB 4560 Charging Units

have deliberately been located on the left-hand side, which

is a different position than found on the mentioned charging

units. The battery pack and disposable batteries are not

included.

Technical Specifications

Electrical

IR irradiance level

4mW/m

per carrier

Angle of half sensitivity ± 50°

Headphone output level at 2.4 V 450 mVrms (speech at maximum

volume, 32 ohm headphone)

Headphone output frequency

range

20 Hz to 20 kHz

Headphone output impedance 32 ohm to 2 kohm

Max. signal-to-noise ratio 80 dB(A)

Supply voltage 1.8 to 3.6 V, nominal 2.4 V

Power consumption at 2.4 V (bat-

tery voltage)

15 mA (speech at maximum volume,

32 ohm headphone)

Power consumption (standby) < 1 mA

Mechanical

Dimensions (H x W x D) 155x45x30mm

(6.1 x 1.8 x 1.2 in)

Weight

excluding battery

including battery

75 g (0.16 lb)

125 g (0.27 lb)

Color charcoal with silver

Ordering Information

LBB 4540/04 Pocket Receiver

4-channel

LBB4540/04

LBB 4540/08 Pocket Receivers

8-channel

LBB4540/08

LBB 4540/32 Pocket Receiver

32-channel

LBB4540/32

1 2 ... 28 29 30 31 32 33 34 35 36 37 38 ... 45 46

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