HELIX DSP MINI Bedienungsanleitung Seite 19

should be increased by the turning the control
carefully clockwise. The setting of the control
affects both the lowlevel and the highlevel in-
puts!
Follow the subsequent steps to perfectly adapt
the signal processors input sensitivity to your
signal source by using the control:
1. Don't connect any amplifiers to the outputs
of the HELIX DSP MINI during this setup.
2. Turn on the signal processor.
3. Adjust the volume of your radio to approx.
90 % of the max. volume and playback a
1 kHz full scale test tone (0 dB) via CD drive.
4. If the Clipping LED already lights up, you
have to reduce the input sensitivity via con-
trol (page 16, item 4; Input Sensitivity) until
the LED turns off.
5. Increase the input sensitivity by turning the
control clockwise until the LED lights up.
Now turn the control counterclockwise until
the Clipping LED turns off again.
5. Connection to power supply
Make sure to disconnect the battery before
installing the HELIX DSP MINI!
Solely use the included screw-type terminal to
connect the HELIX DSP MINI to a power sup-
ply. Make sure of correct polarity. The ground
wire must be connected to the vehicle chassis
at a non-insulated point. Inadequate grounding
causes audible interference and malfunctions.
The positive wire has to be connected to the
battery's positive post or a power distribution
block. Though the current draw of the HELIX
DSP MINI is rather low (approx. 400 mA) we
recommend a minimum wire gauge of 1 mm² /
AWG18 for both power supply wires.
6. Connecting the remote input
The remote input of the Power Input has to
be connected to the radio remote output if the
signal processors lowlevel Line Inputs or the
Optical Input are / is used as signal input/s. We
do not recommend controlling the remote input
via the ignition switch to avoid pop noise during
turn on / off.
If the Highlevel Input is 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 DSP MINI will be turned on automatically
if the Highlevel Input is used or if a signal is
applied to the remote input terminal. The Auto
Remote switch (page 16, item 6; Auto Remote)
allows to deactivate the automatic turn-on fea-
ture of the highlevel inputs. The feature should
be deactivated (Auto Remote = Off) if there are
e.g. noises while switching on / off the signal
processor.
Note: If the automatic turn-on function is deac-
tivated it is mandatory to use the remote input
terminal to power up the signal processor! The
highlevel signal will be ignored in this case.
Note: The automatic turn-on feature of the
highlevel inputs is activated ex works.
8. Configuration of the DSP
The general DSP settings should be con-
ducted with the DSP PC-Tool software be-
fore using the signal processor for the first
time.
Ignoring this advice may result in damaging
the connected amplifiers / the loudspeakers.
Information about connecting the DSP MINI to
a computer can be found on page 20.
9. Connecting the remote output
This output (Remote out) is used to supply re-
mote signals to the external amplifier/s. Always
use this remote output signal to turn on the
amplifier/s in order to avoid on / off switching
noises.
19