Toa AX-1000A, Руководство по эксплуатации

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Attenuation
in dB
Active Inputs (NOM)
One
AX-1000A
Multiple
AX-1000A's
20logNOM
Variable
Attenuation
10logNOM
(normal)
Variable
Attenuation
0dB Attn
Inputs
Inputs
NOM Attenuation Control
The NOM Attenuation Control is variable between 0 log NOM and 20 log NOM. This allows the AX-1000A to be
adjusted for virtually any multi-microphone application.
Often, each microphone in an acoustic space exhibits a particular feedback mode, different from the other
microphones. In these cases, 10 log NOM reduces the gain too much when more microphones become active;
thus operating the system with lower gain than optimum. In such situations, a setting between 0 and 10logNOM
delivers less attenuation with each doubling of active inputs, therefore eliminating unnecessary attenuation.
Feedback modes in very reverberant spaces can be additive to degree that greater attenuation than normal is
needed with more mics on. A setting between 10 log NOM and 20 log NOM provides more gain reduction than
normal as additional microphones become active, preventing feedback.
Note: NOM Attenuation affects overall system gain and is totally independent from the input attenuation
depth function.
Other Features
The AX-1000A's Priority Override Mute is especially attractive in conference systems where the chairman must
override other delegates. Selection of which channels mute when the Mute Terminals are shorted is preset with a
DIP switch. Mute Terminal can be alternatively routed to the module mute bus.
A Master Remote Volume Control may be wired to the Remote Master Volume Terminals on the rear-panel to
enable control of the system's overall output from a podium, projection booth, or similar location. The
Off-Attenuation, Threshold and NOM Attenuation Controls are hidden by a security cover to prevent unauthorized
or unnecessary adjustments.
The AX-1000A includes the hardware necessary for mounting in standard 19" equipment cabinets.
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