AVProAlliance AViMUX4 Руководство по эксплуатации и применению - Страница 12

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Microphone Selection Switching

The iMUX4 has four separate microphone inputs. These inputs are switched to the RTA or iAI2
ANALOG INPUT jack by the five-position MICROPHONE SELECTION switch on the
iMUX4. The first four positions are labeled 1, 2, 3, and 4. These positions switch only the
respective single microphone input to the RTA. These positions are used to calibrate the
individual mic inputs or to monitor the response of only one location in a multiple microphone
setup.
iMUX4
MICROPHONE
MULTIPLEXER
MIC 1
MIC 2
2
1
MICROPHONE
SELECTION
Figure 8. Microphones are selected or multiplexed
to the RTA with the MICROPHONE SELECTION
switch. LEDs indicate which microphone(s) are
selected or active.
The fifth position of the MICROPHONE
SELECTION switch is labeled "1-4." This
position electronically selects each of the
iMUX4's MIC IN jacks momentarily. The
iMUX4 alternately switches to each of the
active microphone inputs, providing a path
from these inputs to the OUTPUT jack.
To multiplex between microphones to analyze with the iAI2 connected to AudioTools iPad App:
1. Connect a cable from the iAI2 Microphone jack to the iMUX4's OUTPUT jack. Power up
the iAI2 and open AudioTools. Once the iAI2 is connected to the iPad there should be an
indication that the audio interface is connected.
Microphone Setup. Select the iAI2 microphone input and confirm calibration. Select
position "1-4" on the iMUX4 MICROPHONE SELECTION switch.
2. Connect desired microphones to iMUX4 MIC IN jacks.
3. LED indicators indicate the MIC Inputs that are being alternately selected by the iMUX4.
The dwell time, or time each MIC Input is selected, is factory set by the iMUX4 internal circuits
to about one second. This time has been optimized for Real Time Analyzing (RTA) when using
AudioTools. This time can be made longer or shorter for special applications by changing the
Multiplex Rate control located near the OUTPUT jack of the iMUX4.
MIC 3
MIC 4
3
4
1-4
The multiplex switching action is done only
between active MIC Inputs. An iMUX4 MIC
Input jack is active if a microphone is
connected to the jack. MIC IN jacks that do
not have a microphone connected to them will
be omitted from the multiplex switching
sequence.
Each active microphone input is selected for
approximately one second. The MIC input
selected is indicated by an illuminated LED.
As different inputs are alternately selected,
the different LEDs light, indicating multiplex
switching.
NOTE: MIC Inputs are active only when a
microphone is connected and drawing current
from the iMUX4. If a microphone is not
connected to a particular input, the iMUX4
will not switch to that MIC In jack. This
permits the iMUX4 to multiplex switch to only
the active inputs. In this manner, the iMUX4
can multiplex switch between 2, 3 or 4 active
microphones.
In AudioTools select Settings then
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