AVProAlliance AViMUX4 Manuel d'utilisation et d'application - Page 11

Parcourez en ligne ou téléchargez le pdf Manuel d'utilisation et d'application pour {nom_de_la_catégorie} AVProAlliance AViMUX4. AVProAlliance AViMUX4 17 pages. Professional microphone multiplexer

OPERATION

Introduction

The iMUX4 Microphone Multiplexer connects to a variety of XLR based RTA's to provide
acoustic analysis of rooms using multiple microphones. Be aware that the microphones use
inverse polarity and a 48v phantom voltage when setting up your RTA. The iMUX4 provides
accurate sound speaker equalization by enabling the simultaneous use of up to four microphones
placed throughout the room. Due to the inherent signal to noise ratio of Type 2 microphones and
the switching circuit of the iMUX4, it is recommend to drive your test tone to a level of at least
70 dB SPL for best results. Care should be taken to periodically calibrate your iMUX4 with your
RTA. This includes alignment of microphone #1 with the RTA and then each remaining
microphone with the first. AVProAlliance.com recommends the Reed SC-05 for this function.
Power – On/Off Switching
The iMUX4 contains no on/off switch. The
iMUX4 circuitry is powered by a 9 volt
battery pack consisting of 6 AA batteries
mounted inside the battery compartment of
the iMUX4. Phantom microphone voltage
supplied to the unit from the RTA switches on
the iMUX4. The phantom
voltage is supplied from the RTA ANALOG
INPUT jack to the "OUTPUT" jack on the
iMUX4.
The RTA (or iAI2) must be connected,
powered on, and the phantom voltage of 48V
selected in the top tool bar before microphone
voltage is output to the iMUX4 and its
internal circuits are powered on.
LEDs on the iMUX4 provide an indication
when the unit is powered on and ready for
operation. When any LED is blinking or
illuminated, the iMUX4 is powered on and
ready for use. Erratic LED blinking indicates
new batteries are required.

Battery Installation/Replacement

microphone
Figure. 7 The iMUX4 battery compartment
The AVPro iMUX4 requires six AA batteries
for proper operation. The iMUX4 draws very
little current from the batteries, so the battery
lifetime will be close to 24 hours. The
batteries are replaceable.
To install or replace the AA batteries:
1. Remove the battery compartment on the
iMUX4 by gently releasing the tab
holding the battery compartment door.
2. The battery compartment door releases
and may be lifted away. Lift gently and
remove the cover.
3. Pull each of the batteries out of the battery
compartment.
4. Install AA batteries into the battery
compartment observing proper polarity.
5. Reinstall the battery compartment door.
10
AA
AA
AA