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the transmitter at a distance of no less than one
metre from the baby.
Setting up the receiver unit
1. Place the receiver vertically close to you.
2. The receiver can either be operated by the attached
power supply station via the mains or by means of
the integrated battery packages.
3. For using the charger operator please do the same
as described for “Charging the battery packages”.
4. When you want to operate the unit with the power
supply station (12), connect the 6-V-power supply
unit with the big plug to the power socket on the
back of the power supply station and connect it to
the mains. As soon as the receiver is connected to
the power supply station, the LED will be illuminated.
5. The device is switched on using the slide switch (8)
of the receiver.
6. The volume can be adjusted as required by turning
the volume control (10).
7. A series of LEDs (9) is located on the front of the
receiver. As soon as a noise is transmitted, this is
indicated not only acoustically but also optically via
the series of LEDs. The louder the noise received, the
more LEDs light up.
Function testing
It is very important to test the baby alarm for correct
functioning before it is used for the first time. To do
so, place the transmitter in its desired position in the
room being monitored and switch on a sound-emitting
device (such as a radio) at normal volume.
Now use the sensitivity control (4) to set the transmitter
to the desired level of source detection. The further you
turn up the controller, the more sensitive the transmitter
becomes.
To complete the procedure, walk around the reception
zone with the receiver unit and set its volume (10) to
the desired level.
Charger monitoring
If the voltage is no longer sufficient in battery operation,
this will be indicated both on the transmitter and the
receiver by the flashing operating LEDs (2 and 9).
Charging the battery packages
The battery packages that are a standard accessory to
the transmitter and the receiver must not be taken out
of the units for charging.
Charging the transmitter
1. Connect the power supply unit to the thin plug on
the 9-V-socket (6) of the transmitter.
2. As soon as the power supply unit is connected to the
transmitter, charging automatically begins.
3. The charging time for completely charging empty
battery packages and from a turned off unit is about
16 hours. The charging time is doubled if the
transmitter is switched on.
Charging the receiver
1. Connect the power supply unit to the thick plug on
the charger station socket (12).
2. As soon as the power supply unit is connected to the
charger station and the receiver is on the charger
station, charging automatically begins. The
illuminated red LED on the charger station will indicate
this process to you.
3. The charging time for a completely empty battery
package and turned off unit is about 16 hours. If the
receiver is turned on during the charging process the
charging time is doubled.
4. You can leave the unit in the charging station after
completed charging. The LED on the charging station
is not turned off after charging is completed!
Tip! Overcharging the battery packages is technically
impossible.
Inserting/changing the battery packages
Place the unit with the back towards you. You will then
see the fishplates of the battery cover from below; pull
until you hear that they are out of the holders (see
Illustration on page 14).
Then open the battery cover and extract the empty
battery package from the unit. Insert the new battery
package paying attention to the (+/-) polarity in the
allocated troughs (see housing stamping).
Now close the battery cover in reverse order and press
down the fishplates, until you hear that it is secured to
the battery cover.
Consumer reference
Please take care that all NiCd- and NiMH-chargers reach
the full capacity for from 4 to 6 charging processes.
Notes on Disposal
Old units, marked with the symbol as illustrated, may
not be disposed of in the household rubbish.
Used rechargeable and non-rechargeable batteries which
are marked with one of the symbols illustrated may not
be disposed of in the household rubbish.
You must take them to a collection point for old units,
old batteries or special waste (enquire at your local
authority) or the dealer from whom you bought them.
These agencies will ensure environmentally friendly
disposal.
900-MHz technology
The system operates in the 900 MHz frequency range,
which is immune to interference caused by CB and
amateur radio.
Digital Coding
Radio security and being free of interference for this
Baby-calling unit is significantly improved by a signal
that is inaudible for you and which has been digitally
coded and tested in practice.
The coding causes the receiver to be turned on only
when noises (e. g. of a waking baby) are transmitted
from its own transmitter.
You have 16 different digital codes, which you can use
with the help of the DIP-switch (13) individually
according to your environment. The activation of the
receiver by other transmitters or other Baby monitoring
systems is practically impossible.
For the few cases where you are disturbed during
transmission by another signal source on the 900-MHz-
frequency, you have additionally the possibility of
switching to another channel.
Range controls
If the receiver is located outside the range of the
transmitter, this is indicated by the flashing of the
optical range alarm LED (9) on the receiver and the
sounding of the range signal of the receiver.
The range alarm will be set off about 30 seconds after
the connection with the transmitter is broken.
Furthermore, the visual and audible range alarm of the
receiver is set off if:
• the transmitter is turned off,
• the transmitter is tuned into a different channel to
that of the receiver,
• the transmitter is tuned into a different Digital-Code
to that of the receiver,
• the transmitter is working with a charger with low
battery package.
Vibrating alarm
A further feature of the receiver is a vibrating alarm
that you can turn on or off using the switch (7). This
enables you to discretely receive a signal sent by the
transmitter.
Optical send/receive displays
As soon as a noise is transmitted and received, the
transmission indicator on the transmitter (3) and the
reception indicator on the receiver (9) both light up.
As soon as no signal is transmitted or received, the
transmission and reception indicators go out.
Belt clips
The transmitter and receiver can both be carried around
using the belt clip provided on the rear of each unit.
References and remarks for if you receive
interference
• If the transmitter or the receiver shows no function,
please check the power supply.
• If no transmission between transmitter and receiver
takes place, please check the Digital-Code and
the send/receive channels of both units (a
connection can be made only if the Digital-Codes
and the channels are the same).
• A constant beeping of the receiver means that
you are out of range of the transmitter – please
reduce the distance between transmitter and
receiver.
• As the MBF 8020 N works on the basis of radio
waves, it is possible that you are able to hear
conversations of other people on the radio wave
and that other people on the radio wave can hear
the conversations and noises that are emitted
from your transmitter likewise.
MBF 8020 N however, uses transmission frequencies
that largely rule out such interference. If, however,
you should have such interference exceptionally,
switch it a different channel (frequency) and/or
change the digital Code of your baby-calling unit.
• To guarantee maximum transmission/receiving
possibilities place the transmitter and receiver
vertically.
• If the receiver is too near to the transmitter and
its volume is high, a beep can be produced
(Feedback/acoustic back coupling). To avoid this,
the distance between the transmitter and receiver
should be increased.
• Low battery package can lead to the receiver
making noises or to a range alarm being set off.
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