HELIX DSP.3S General Instructions Manual page 26

Unique features of the HELIX DSP.3S
96 kHz sampling rate
The HELIX DSP.3S allows to handle all signals with
the doubled sampling rate of 96 kHz. Thus the au-
dio bandwidth is no long er limited to usual values
like 22 kHz but allows an extended frequency re-
sponse to more than 40 kHz. Doubling the sampling
rate requires significantly higher DSP power as the
number of possible arithmetic operations is halved.
Only the implementation of the latest DSP chip gen-
eration allows raising the sampling rate to 96 kHz
and adding new features at the same time.
ACO – Advanced 32 Bit CoProcessor
The HELIX DSP.3S incorporates an extraordinary
powerful 32 Bit CoProcessor of the latest gener-
ation for all monitoring and communication tasks,
both internally and externally. In opposite to the
8 Bit predecessor generation this MCU achieves
way higher speeds with respect to setup switching
and data communication with our DSP PC-Tool
software. A further significant advantage is the in-
tegrated, native boot loader of the CoProcessor. It
allows software upgrades of all components of the
DSP in order to adjust the microcontroller-controlled
ADEP.3 circuit for example at future modifications /
changes in the diagnostic system of factory radios
or if the device will be extended with additional inter-
faces. In addition, thanks to the new flash memory,
the ACO offers 10 memory locations for sound set-
ups instead of the common two.
Smart highlevel input ADEP.3
Modern, factory-installed car radios incorporate so-
phisticated possibilities of diagnosing the connect-
ed speakers. In particular the latest generation of
car radios are equipped with additional monitoring
functions so that failure messages and loss of spe-
cific features (e.g. fader function) quite often appear
if a signal processor will be hooked up – but not with
the DSP.3S.
The new ADEP.3 circuit (Advanced Diagnostics
Error Protection, 3rd Generation) avoids all these
problems without loading the speaker outputs of the
OE radio during high volumes unnecessarily.
Start-Stop capability
The switched power supply of the HELIX DSP.3S
assures a constant internal supply voltage even if
the battery's voltage drops to 6 Volts during engine
crank.
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Power Save Mode
The Power Save Mode is incorporated in the basic
setup. It allows to significantly reduce the power
consumption of the amplifiers that are connected
to the HELIX DSP.3S once there's no input signal
present for more than 60 seconds. Please note that
in many up-to-date cars with "CAN" or any other in-
ternal bus structures it may happen that the radio
remains "invisibly" turned on for up to 45 min. even
after locking and leaving the car! Once the "Power
Save Mode" is active the remote output and there-
fore the connected amplifiers will be turned off. The
HELIX DSP.3S will reactivate the remote output
within a second if a music signal is applied. It is pos-
sible to either modify the turn-off time of 60 sec. or
completely deactivate the "Power Save Mode" via
the DSP PC-Tool software.
Automatic Digital Signal Detection
The HELIX DSP.3S allows signal-controlled switch-
ing between the analog and the digital inputs. As
soon as an input signal is detected on the Optical
or Coaxial Input, the signal processor automatical-
ly switches to the appropriate input. This feature
can be deactivated in the DSP PC-Tool software.
Alternatively you can use an optional remote con-
trol for manual switching between analog and digital
inputs.