Advantech PCM-9550F, User Manual

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2 6 PCM-9550F/FM/L User's Manual
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2.17.3 Audio power source setting (J7)
The PCM-9550F/FM is designed to work with a 5 V power
supply. The audio interface can also function normally under
5V power supply, but most audio controllers require an
independent power source generated from a +12 V power supply.
The independent power source avoids the noise from the other
digital circuits. The PCM-9550F/FM’s audio interface can accept
+12 V power to provide improved quality audio. This is done via
J7.
Table 2-5: Audio power source setting
*+5 V +12 V
J7
* default setting
Configuration of the audio interface is done entirely via the
software utility. You do not have to set any jumpers. Refer to
Chapter 6 for audio setup details.