Alesis IO|2 Manuel D'utilisation Du Propriétaire page 13

Symptom
USB light does not
turn on.
Input meters are not
responding
S/PDIF I/O is not
working
The input switch is set
to "Analog" but my
incoming signal is still
not present (or it is
very soft).
My S/PDIF inputs
and outputs just put
out clicks, pops, or
white noise
Troubleshooting:
Cause
The IO|2 is not
receiving power or
USB connection is
not being made to
your computer
The digital/analog
input switch may be
set incorrectly
The digital/analog
input switch may be
set incorrectly
Your phantom
power or mic/line
switches may not be
set correctly
Your coaxial cables
are not 110-ohm.
Solution
Make sure you are connecting your IO|2
directly to your computer's USB connector and
not into a USB hub. If this does not solve the
problem, double check your driver installation
and verify that the IO|2's drivers have been
installed properly. If the problem persists, the
cable may be faulty. Try using another USB
cable.
Make sure the input switch is set to "analog" if
you are recording using the XLR and 1/4"
inputs on the top of the IO|2. Only set this
switch to "digital" if you want to use the
S/PDIF connectors.
If you plan to use S/PDIF connections to
transfer audio digitally, make sure the input
switch is set to "digital." Otherwise, leave this
switch set to "analog" for normal operation.
Double check that the mic/line switch is set
correctly for each channel. If you're using
condenser microphones that require phantom
power, turn on the +48v phantom power
switch. Finally, make sure the gain knob is
turned up.
It is very important to use 110-ohm coaxial
cables for all S/PDIF connections. Most plain
RCA cables are NOT 110-ohm and cause
clocking problems between two digital devices.
This causes loud clicks, pops, and sustained
white noise.
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