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Front View Input Volume ControlMaster Volume Control
Channel Controls:
Gate-On LED Master/Slave LED
THR OFF ATTNOM ATTPower Switch
and LED
Variable ThresholdEach threshold control adjusts its channels detector, raising and lowering the
baseline sensitivity to an incoming signal. It determines how easily the input will
gate on. Threshold is independent of the Off-Attenuation setting.
Variable Off-Attenuation This control, permitting continuous adjustment of a channels Off-Attenuation
(depth), operates from 0dB (full CW) to -40dB (full CCW). In the 0dB position, the
channel acts as a conventional mixer input. At that setting there is no attenuation
of the input whether it is above or below threshold.
Channel
output:
Relation of Threshold
and Off-AttenuationControls (simplified): Channel
System Output Gain:
Adjustable NOM Attenuation Automatic gain reduction is continuously variable from none to 20logNOMdB.
(NOM=Number of Open Mics.) At the center detent, the attenuation of system
output gain follows the standard formula 10logNOM. When the control is moved
clockwise, the attenuation is deeper, moving from 10logNOM to 12logNOM,
15logNOM, etc.
Attenuation is at a maximum fully clockwise, following the formula 20logNOM.
With the control set fully counterclockwise there is no system output gain attenua-
tion and the AX-1000A functions as a normal mic/line mixer. Between no attenua-
tion and the detent, output gain is attenuated more and more up to 10logNOM.
20logNOM
20logNOM
2 4
Active Inputs (NOM)
8Inputs
0 dB Attn.
10 16 20 40 80Inputs
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Rear View Remote Master
Volume Terminals Logic Output Terminals Module Direct-Output
Jacks (1/4) System Mute Terminals(Priority Override)
Channel Mute
DIP Switches
Modular Inputs
In a significant advance for automatic
mixing systems, the AX-1000A uses TOAs
standard 900 Series input modules. Any
combination of Mic and Auxiliary Preamps
can be specified in an installation. If it is
important to allow for future expansion, only
a few of the input ports need be used.
Logic outputs, direct outputs, link in and
out, system mute terminals and remote
master volume control terminals are located
on the rear panel.
Function
Select
Link In& Out
Master/
Slave Switch
SLAVE
Main Output Terminal
600 ohms or 150 ohms
System Mute
(Priority Override)
A DIP switch determines which channels are muted when the two rear-panel mute
terminals are shorted by a relay or switch closure.
AX-1000A Internal Muting occurs within the mixer, after the signal has left the input
module itself. Thus, any 900 Series input module will be muted when the contacts
are closed. The module does not have to be a 900 Series muting module,.
In fact, by using 900 Series muting modules, two levels of muting are possible.
The first level can be automated. It utilizes the Mute Send and Mute Receive
features of certain 900 Modules. The second level utilizes the
Mute built
into the AX-1000A.
Direct Outputs Each channels Direct Output provides a signal from the corresponding module.
It has been processed by the preamplifier and other circuitry in the module itself,
including, for example, compression in the case of the U-61 module. However,
the Direct Output signal is unaffected by the action of the AX-1000As gating,
muting, or gain-sharing circuits.
Logic Outputs Each channels Logic Output is an open-collector circuit. The logic outputs may be
connected to relays for automatic initiation of events in an automatic zonal switching
system, triggering video camera controls, etc.
Link In and Out When AX-1000A mixers are run in multiple, one of the mixers operates as the Master
and the rest operate as Slaves. The Master/Slave relationship is determined by the
rear-panel slide switch. The Master is connected to the Slaves using the Link In and
Out connectors. An optional Link cable is available.
Main Output The Main Output barrier strip can be configured for 150 ohms or 600 ohms operation
by moving the jumpers (provided).
