OPERATING INSTRUCTIONS FOR THE INT202 FIREWIRE INTERFACE
Page
14
Date: 03/10
If the INT202 powers up with the computer connected
and with no external power supply connected, then there
obviously is bus power available. If preferred, the
external power supply may still be connected in that
case. The INT202 then automatically switches over to the
external power supply.
A 4 pin Firewire socket looks like this:
Software features:
The software in the INT202 allows for level control and
for absolute phase reversal. These features are only
accessible via the (optional) Remote Control unit. If the
remote control unit is not used, the gain stays at 0dB as
set at the factory. 0dB means a fully bit transparent
transfer. The absolute phase is set to 0°, i.e. the phase is
not changed.
The level control is properly dithered, i.e. there are no
artefacts due to the level control. A paper on the topic of
digital level control (including sound examples) can be
found here:
http://www.weiss-
highend.ch/computerplayback/Digital_Level_Control.pdf
In addition the software allows for the testing of the bit
transparency of the music player program running on the
computer. This is useful to find out the proper settings /
configuration of the player program to achive bit
transparency. Bit transparency means that the bits fed
from the harddisk to the INT202 are not changed in any
manner.
