Audiotec Fischer Match UP 7BMW Bedienungsanleitung Seite 22

Installation
3. Adjustment of the input sensitivity
The Gain control (page 18, item 14) is used to
adapt the input sensitivity to the output voltage
of the connected head unit / car radio. Adjust-
ments with this control do not affect the opti-
cal input! This is not a volume control, it´s only
for adjusting the amplifiers gain. The ex works
setting of the highlevel input sensitivi ty of the
UP 7BMW is the maximum coun ter-clockwise
position. This is definitely the best setting for
most applications. Only if the car radio doesn't
deliver enough output level, the input sensitivity
should be increased by turning the Gain control
carefully clockwise (max. 12 dB).
4. Connecting a digital signal source
If you have a signal source with an optical digital
output you can connect it to the amplifier using
the appropriate input. In standard configuration
the MATCH UP 7BMW automatically activates
the used digital input if a digital audio signal is
detected. This function can be deactivated via
the DSP PC-Tool software. Alternatively you
can manually activate the digital input if you are
using the optional remote control.
The automatic turn-on circuit does not work
when the digital input is used. Therefore it is
mandatory to connect the remote input (REM).
Please note that it is possible to connect a
source to the digital input and the highlevel in-
puts at the same time.
Important: The signal of a digital audio source
normally does not contain any information about
the volume level. Keep in mind that this will
lead to full level on the outputs of the MATCH
UP 7BMW. This may cause severe damage to
your speakers. We strongly recommend to use
an optional remote control for adjusting the vol-
ume level of the digital signal input!
Information: The UP 7BMW can only handle
uncompressed digital stereo signals in PCM
format with a sample rate between 12 kHz and
96 kHz and no MP3- or Dolby-coded digital au-
dio stream!
5. Connection to power supply (optionally)
Note: By default the UP 7BMW will be directly
powered from the original cable harness of the
vehicle via the enclosed connection cable.
22
In some cases it may be necessary to connect
the UP 7BMW directly to the car battery, for ex-
ample if additional amplifiers or loudspeakers /
subwoofers with higher power handling will be
connected to the amplifier.
Make sure to disconnect the battery before
installing the MATCH UP 7BMW!
Connect the +12 V power cable to the positive
terminal of the battery. The positive wire from
the battery to the amplifier power terminals
needs to have an inline fuse (50 A) at a distance
of less than 12 inches (30 cm) from the battery.
If your power wires are short (less than 1 m /
40") then a wire gauge of 6 mm² / AWG 10 will
be sufficient. In all other cases we strongly rec-
ommend gauges of 10 - 16 mm² / AWG 8 – 6!
The ground cable (same gauge as the +12 V
wire) should be connected to a common ground
reference point (this is located where the neg-
ative terminal of the battery is grounded to the
metal body of the vehicle) or to a prepared met-
al location on the vehicle chassis, i.e. an area
which has been cleaned of all paint residues.
6. Connecting the remote input (optionally)
Note: This input does not have to be used if the
UP 7BMW replaces the amplifier of the BMW
HiFi sound system (676).
In case that the UP 7BMW will be applied in
universal applications and the amplifiers Optical
Input is solely used as signal input or the signal
source which is connected to the System Con-
nector 1 and 2 is not activating the "automat-
ic turn-on" function (Auto Remote) the remote
input has to be connected to the radio remote
output. We do not recommend controlling the
remote input via the ignition switch to avoid pop
noise during turn on / off.
If the highlevel inputs of the System Connec-
tor 1 are used this input does not need to be
connected as long as the car radio has BTL
output stages.
7. Configuration of the remote input
The UP 7BMW will be turned on automatically
if the highlevel inputs of the System Connec-
tor 1 are used or if a remote signal is applied to
the remote input (REM) terminal or Remote In
of the System Connector 2. The Auto Remote