ATI Audio MX200 User Manual
Page 6
Audio Technologies Inc. 856-719-9900 [email protected] www.
audio.com
Tone
Oscillator
and
Slate
Microphone
-‐
MXS100
only
A three position, center off toggle switch in the upper left corner of the panel
selects a 700Hz test TONE oscillator in the up position indicated by an adjacent
green bi-color LED. The tone level is adjusted by R101 and feeds the mixing
buss a factory preset level which will produce an output of +4dBm with the
MASTER control set to the recommended 8dB below maximum.
The built-in SLATE microphone is selected by the same toggle switch in the
momentary down position. The LED will light yellow. The slate microphone gain
is preset, if too high, talk softer, if too low, talk louder. If the yellow light is on
don’t talk about your boss.
Output
Level
Controls
The Master control adjusts the Line Outputs as indicated by the LED meter. The
Master control should operate around the 2 o'clock position (-8dB) to maximize
internal headroom and optimize noise performance. Close tracking stereo VCAs
(voltage controlled amplifiers) are operated by the MASTER and PHONES level
controls. VCAs eliminate the stereo image shifts, which could occur due to
possible mistracking of conventional multisection gain controls.
LED
Meters
Ten segment three-color LED bargraph displays meter the outputs with a VU
average response characteristic. Internal calibration pots, R92 (L) and R93 (R),
set the meter readings to indicate 0VU at +4dBm output level and are adjustable
from -10 to +8dBm. LEDs are driven in series to minimize current draw while
providing a bright, color saturated display, which is easily seen, even in bright
sunlight.
Compressor/
Limiter
-‐
MXS100
and
MX200C
The MXS100 and MX200C incorporate a switched low-distortion compressor/
limiter with a front panel switch and peak indicating LED. The limiter threshold is
adjusted relative to the 0VU meter indication with internal trimpot R110 and is
factory set to +3VU with identical Left and Right signals applied. This setting
corresponds to +9VU peaks for either Left or Right outputs individually.