be necessary to directly connect input and output
ground or to tie both grounds together via a resistor.
Therefore the
Ground lift switch
has three positions:
-
center
position: input and output ground
separated.
- left position: input and output ground tied
together.
-
right
position: input and output ground
connected via 200 Ohms resistor.
8
Control pushbutton
The
Control pushbutton
allows the user to switch
between the two setup memory positions. To switch
between the setups the button has to be pressed
and held for one second. Switching is indicated by
a single red flash of the
Status LED
. Pressing the
button for five seconds completely eras es the inter
-
nal memory. This is indicated by a constant flashing
of the
Status LED
.
Attention:
After erasing the setups from memory
the HELIX DSP PRO MK2 will not reproduce any
audio output.
9
Status LED
The
Status LED
indicates the current active DSP
setup. Green means that setup 1 is load ed, orange
means that setup 2 is loaded. A flashing red light in
-
dicates that no setup is loaded. In that case please
load a new setup via the DSP PC-Tool software. If
the LED starts blinking orange, the internal tem-
perature protection is active. At first the remote out
-
put will be turned off. If the temperature still rises the
signal processor will shut down until it has reached
a safe temperature level again.
10
USB input
Connect your personal computer to the
DSP PRO MK2 using the provided USB cable.
The required PC software to configure this signal
processor can be downloaded from the Audiotec
Fischer website
www.audiotec-fischer.com
.
Please note:
It is not possible to connect any USB
storage devices.
11
Control Input
This multi-functional input is designed for HELIX ac-
cessory products like a remote control which allows
to adjust several features of the signal processor.
Depending on the type of remote control, at first its
functionality has to be defined in the “ Device Con
-
figuration Menu” of the DSP PC-Tool software.
12
Line Output
10-channel pre-amplifier output for connecting
po wer amplifiers. The output voltage is 8 Volts max.
Please make sure that you always turn on/off exter-
nal amplifiers using the remote output of the signal
processors
Power Input
. Never directly control the
external amps by a signal from the ignition switch
of your car! Additionally this output will be turned
off when the “Power Save Mode” of the signal pro-
cessor is active. The outputs can be assigned to
any of the inputs as desired using the DSP PC-Tool
software.
18
Initial start-up and functions
