User's Guide AO4S-192
5
6. Alternative Installation
Installation is done comfortably as described using the attached bracket. Alternatively it is pos-
sible to mount the AO at a different place inside the computer using the supplied nuts. This
requires to drill 4 holes into the housing.
RME does not accept claims for damages of any kind when installing the AO in this
way! Modifications to the housing should be done by qualified technicians only, and
only after having removed all components from the housing (danger of short circuit
by metal splinter etc).
1.
Remove the bracket from the AO (2 screws).
2.
Carefully check that the desired location offers a flat plane, is free from any voltage carrying
devices or cables, and that the AO does not get in contact with other devices even when the
housing is closed.
1.
Please note that the lenght of the supplied cables does not allow any distance to the HDSP
9632 card.*
3.
Drill 4 holes, diameter 0.5" (13 mm), distance of 0.75" (19.05 mm) each, at the desired
place (see drill template).
4.
Fit the AO into the holes and fix it with the supplied nuts.
*The supplied 26-pin flat ribbon cable is a common component, available in any electronics
shop. A cable of up to 1 meter length can be used without a problem.
7. Operation and Usage
Switch on the computer and boot the OS. 4 additional outputs should now be available within
any audio software.
Note: the AO carries three SMD LEDs, indicating the presence of the power su5V,
+12V and –12 V.
8. Analog Outputs
The short circuit protected, low impedance and balanced line outputs are accessible through
stereo ¼" TRS jacks.
The electronic output stage does not operate servo balanced! When connecting unbalanced
equipment, make sure the ring of a TRS jack is not connected. A conection of ring to
ground (monaural jack) will cause an increase in THD (higher distortion)!
When using unbalanced connections, make sure 'Breakout Cable / XLR' is not selected in
the Settings dialog. Else the unbalanced output level will be 6 dB too low!
To maintain an optimum level for devices connected to the analog outputs, the HDSP 9632
and the AO/AI4S-192 use hi-quality electronic switches, which allow for a perfect adaptation of
all outputs to the three most often used studio levels.
As with the analog inputs the analog output levels are defined to maintain a problem-free op-
eration with most other devices. The headroom of the HDSP 9632 lies between 9 and 15 dB,
according to the chosen reference level: