Extron electronics MediaPort 200 User Manual page 23

Typically, mic audio level will be set higher than program audio. It is recommended that the
Mic level control be set to 0 dB, or unity gain, which is the optimal level sent to the USB
Out and received by the computer. Program Volume is then set relative to the mic volume,
providing a good listening level such that the far end does not need to make an adjustment
to their volume control to compensate for discrepancies between mic and program volume
levels.
NOTE: The ducker can be used so that when the microphone (a talker) and program
AEC Ref and Aux Outs
These two outputs provide special routing capabilities that make it easy to use the
MediaPort 200 with an external DSP with AEC and/or a hardware video conferencing device
(video codec). The AEC Ref Out carries the only far end USB Communications audio, while
the Aux Out carries only the audio signal from the MediaPort Mic/Line In.
Figure 10 below highlights the routing to these two outputs. There are no master controls
for these signal paths. Level is set on the input gain controls and the output attenuation
controls.
Set the input gain for optimal signal levels in the
page 51). Settings for AEC Ref and Aux Out attenuation controls may remain at 0 dB
for unity gain in most cases. Adjust the output controls if the device connected to these
outputs requires a lower signal level, though it is recommended to adjust the input level of
the connected device in this case.
USB PLAYBACK L
GAIN
USB PLAYBACK R
GAIN
HDMI IN L
GAIN
HDMI IN R
GAIN
LINE IN L
GAIN
LINE IN R
GAIN
USB COMMUNICATIONS L
GAIN
USB COMMUNICATIONS R
GAIN
MIC/LINE IN
GAIN
Figure 10.
material are active simultaneously, speech takes precedence over program so that
speech can remain intelligible (see
FLT COMP GAIN
FLT COMP GAIN
FLT COMP GAIN
FLT COMP GAIN
FLT COMP GAIN
FLT COMP GAIN
FLT COMP DUCKER GAIN
FLT COMP DUCKER GAIN
FLT COMP DUCKER GAIN
AEC Ref and Aux Out Routing (Example)
Ducking on page 55 for more information).
tab in PCS (see
Input
SIG
FLT
GEN
SIG
FLT
GEN
SIG
FLT
GEN
SIG
FLT
GEN
SIG
GEN
SIG
GEN
MediaPort 200 • Theory of Operation
Input Tab on
USB OUT L
LIM ATT
USB OUT R
LIM ATT
LINE OUT L
LIM ATT
LINE OUT R
LIM ATT
REF OUT
ATT
AUX OUT
ATT
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