Bosch INTEGRUS Service Manual Page 71

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Integrus Operation | en 71
Bosch Security Systems B.V. Installation and Operation manual IOM-INT | V1.1 | 2010.12
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 7.2.4 ).
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.
9.3.2 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 (0-7) and then a quality indication (00-90).
The reception quality can be assessed as follows:
NOTICE!
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.
NOTICE!
When the receiver is not used, disconnect the headphones. This ensures that the receiver is
totally switched off and no energy is consumed from the batteries or the battery pack.
NOTICE!
When the receiver does not receive the selected carrier, it keeps displaying the carrier number
and does not display its quality.
Indication Quality
00-39 Good reception. Very good audio quality.
40-49 Weak reception. Ticks in the audio.
50-90 No or bad reception. Poor audio quality.
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