25
en
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 recommend gauges of 10 - 16 mm² /
AWG 8 – 6!
GND: Connector for the ground cable. The
ground wire must be connected to the vehicle
chassis at a non-insulated point. The cable
should have the same gauge as the +12 V wire.
Inadequate grounding causes audible interfer-
ence and malfunctions.
8. Connecting the PC & first start-up
The USB input enables the connection of the
UP 8DSP to a personal computer and its free
configuration with our DSP PC-Tool software
using the provided USB cable.
Please note:
It is not possible to connect any
USB storage devices.
Prior to connecting the amplifier to your PC visit
our website and download the
latest version of
the DSP PC-Tool software
.
We strongly recommend to carefully read the
DSP PC-Tool knowledge base before using the
software for the first time in order to avoid any
complications and failures.
Important:
Make sure that the amplifier is not
connected to your computer before the soft-
ware and USB driver are installed!
In the following the most important steps how
to connect and the first start-up are described:
1. Download the latest version of the DSP
PC-Tool software (available on our website
www.audiotec-fischer.com
) and install it
on your computer.
2. Connect the amplifier to your computer us
-
ing the USB cable that is included in deliv-
ery. If you have to bridge longer distances
please use an active USB extension cable
with integrated repeater.
3. First turn on the amplifier and then start the
software. The operating software will be up-
dated automatically to the latest version if it
is not up-to-date.
9. Adjustment of the input sensitivity of the an
-
alog inputs
ATTENTION:
It is mandatory to properly
adapt the input sensitivity of the UP 8DSP to
the signal source in order to avoid damage
to the amplifier.
The input sensitivity can be optimally adapted to
the signal source using the DSP PC-Tool soft-
ware. Input sensitivity is factory set to 11 Volts.
This is definitely the best setting in most appli
-
cations. Only if the head unit / car radio doesn ́t
deliver enough output level, the input sensitivity
should be increased.
Note:
Mute all signal outputs of the UP 8DSP
during this setup.
For adjustment of the input sensitivity please
proceed as follows:
1. Turn on the amplifier.
2. Start the DSP PC-Tool software.
3. The adjustment of the input sensitivity can
be found in the “Signal Management” tab of
the DCM menu under the item “Main Input →
Input Gain”.
4. Select the setup method to adjust the input
sensitivity.
Standard Gain Setup: This method allows go
globally set the input sensitivity for all input
channels (only with “Low Voltage Range”
jumper plug-in position – see left).
Advanced Gain Setup: This method allows
an individual setting for each channel pair.
