Operation; Reception Test Mode; Receiver Headphones - Bosch INTEGRUS Installation And Operating Manual

INTEGRUS | Digital Infra-red Language Distribution System

4.2 Operation

The receiver cannot operate when no headphone is connected. After connecting the headphone the receiver switches to stand-
by mode. Push shortly on the on/off button to switch the receiver on.
The channel number is shown on the LCD display. The channel can be changed with the channel selector. Push it to the up- or
down-position to increase or decrease the channel number. The highest channel number is automatically matched to the
number of channels that has been set on the transmitter (see section 2.5.8).
A battery symbol is visible on the display when the batteries or the battery pack is almost empty.
An antenna symbol is visible when the receiver picks up a modulated infra red signal of adequate quality. During short
interruptions in the reception, the receiver mutes the headphones output. When no adequate IR signal is detected for more than
1 minute (e.g. when a delegate leaves the conference room), the receiver automatically switches to stand-by mode.
The volume can be changed by moving the volume control up or down.
The receiver can be manually switched to stand-by mode by pressing the on/off button for more than 2 seconds.
When the headphone is disconnected, the receiver is automatically switched off. (A switch in the headphone connector
disconnects the batteries.)
The infra-red receivers can operate with disposable batteries (2x AA-size alkaline cells) or with a rechargeable battery pack (LBB
4550/00).
Insert the batteries or the battery pack in the receiver with the correct polarity as indicated in the battery compartment. The
battery pack has a separate connection cable which must be connected to the receiver. When this connection is not present, the
charging circuitry in the receiver will not work. This also prevents the unwanted charging of disposable batteries. The battery
pack has a temperature sensor which prevents overheating during charging.
For more information about charging the battery pack see chapter 5.
: Disposable batteries and battery packs at the end of their technical lives should be discarded with due care for the environment.
When possible, take batteries to a local recycling station.

4.3 Reception test mode

The receivers can be switched to a test-mode to get an indication of the reception quality for each carrier separately.
To activate the test-mode: Push the channel selector to the Up-position, press the on/off button and hold both for ca. 2
seconds. When in test-mode, switch between carriers by using the channel selector. The receiver's display will shortly show the
carrier number (1-8) and then a quality indication (00-99). The reception quality can be assessed as follows:
Indication Quality
00-39 Good reception. Very good audio quality.
40-49 Weak reception. Ticks in the audio.
50-99 No or bad reception. Poor audio quality.
The test mode is deactivated when the receiver is switched off.

4.4 Receiver headphones

The headphones connect with the receivers via a 3.5 mm (0.14 inch) stereo jack connector. Suitable headphone types are:
LBB 3441/00 Under the chin mono headphones
LBB 3442/00 Single earphone (mono)
LBB 3443/00 Stereo headphones (recommended)
Or any other compatible type (see chapter 8, Technical Data).
BOSCH Security Systems | February 2003
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