IHSE USA R434-91 Series SDLink Rackmount Hubs - Manual (Page 57)

Appendix E: Audio/Serial Ports: Operation & Multi-Port Configuration 55
Audio Interface - Set Up and Operation
The audio interface is line-level and is designed to take the output from a sound
card (or other line-level) source and be connected to a set of powered speakers
at the other end of the link.
Stereo audio may be transmitted either way across the link (simultaneously).
No setup is required unless a microphone is connected to the Remote Unit.
Connect the extender as follows:
• Take the line-level output from your sound card (green connector) and
connect to ‘Line In’ on the Local Unit.
• Connect ‘Line Out’ on the Remote Unit to a set of powered speakers.
Audio Interface – Using a Microphone
A microphone may be plugged into the ‘Line In’ connector on the Remote Unit.
There are two ways of setting up a microphone:
• The Local Unit’s ‘Line Out’ connection should normally be wired to the
microphone input (Pink) on your sound card. The sound card should then be
set up to provide additional amplification (+17dB). This is the preferred
connection method.
• Alternatively, the Remote Unit itself can provide microphone amplification.
To set this, open up the Remote Unit and locate the jumper labeled ‘MIC’
on the daughter board. Connect this jumper across the pins. The Local
Unit’s ‘Line Out’ connection should then be wired to ‘Line In’ (Blue) on
your sound card.
If your microphone is already amplified, follow the second method but DO
NOT install the amplification jumper in the Remote Unit.