AT-MX341a Front Panel
1.
Power switch.
2.
Power “on” indicator.
3.
Input Gain controls. Adjust inputs for microphone sensitivities and/or
operating conditions.
4.
Selected Channel LED indicators. Indicate which channels are “on” or “active.”
5.
Output Level LED meter. Indicates RMS output level of the mixer. “Zero” (0) level is
factory calibrated for an output of +4 dBm into 600 ohms (Master Level control fully
clockwise). Can be set for peak output level indication via internal switch (see page 8).
6.
Priority Pre-select switches. A switch in the “up” position assigns the respective
channel priority over the other channels. A priority channel can not be locked out by
other channels. Any combination of priority/non-priority selections is allowed.
7.
Master Level control. Normal setting is fully clockwise (full output). If reducing the
mixer’s output is necessary, carefully turn the control counter-clockwise as needed with
a small screwdriver. Once set as desired, the control may be protected from unauthorized
adjustment by covering the panel hole with a sticker provided with the security caps.
(This control does not affect the meter indication.)
8.
Master Threshold / Manual control. Sets the reference level that must be exceeded
for a microphone to be considered “in use.” Adjust to keep background noise level from
triggering microphones. “Manual” setting bypasses all of the SmartMixer’s automatic
functions.
9.
Lockout LED indicator. Shows when lockout bus is active. Also aids in setting
Master Threshold.
Figure 1. Front panel
Gain 4
Gain 3
Gain 2
Gain 1
Power
AUTOMATIC MICROPHONE MIXER
Selected Channel
AT-MX
341a
Master
Threshold
Manual
Master
Level
Lockout
Output Level
-20
-10
-6
-3
0
+3
+6
Priority Pre-select
1 2 3
4
➋
➌
➏
➍
➊
➐
➒
➎
➑
4
