TOA Electronics A-9120S Stereo Amplifier User Manual


 
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8.2. Glossary
• ANC (Ambient Noise Control) function (AN-001T only)
The ANC function automatically adjusts the amplifier's output volume in response to the change in ambient
noise level.
The output volume changes as the ambient noise level goes above or below the set reference level.
• Ducker function
The Ducker function automatically attenuates input signals with lower priority when two or more audio
signals are simultaneously received. This function cannot be used if any of such received inputs is not set for
the Ducker function.
• VOX (Voice Operated Exchange) function (D-001T and D-001R only)
This function activates the set Event when an audio signal is input. No Event is activated when no input
signal exists. If the audio signal drops below a preset level after the VOX function begins operation (i.e. after
an audio signal is fed into the module), the set Event is terminated after approximately 5 seconds.
• Event
An "Event" is the unit that defines broadcast pattern and up to 32 Events can be stored.
When operating the system in the matrix mode, be sure to preset the Event to complete the Route settings.
• Event classification
[ROUTE]
This setting defines which audio input signal is transmitted to which audio output. Multiple outputs can be
selected. Input channels set to priority levels 1 – 7 are for priority broadcasts, while the input channel set to
priority level 8 is for BGM broadcasts. Set Trigger to "None," "VOX" (D-001T and D-001R only) or "Control
Input" (1 – 12). Selecting Control Input for Trigger causes BGM broadcasts to be activated by pulse trigger,
and priority broadcasts to be operated by level trigger. It is possible to synchronize control inputs and control
outputs, with output being produced as long as the Event is activated.
To terminate the BGM Event (priority 8) in progress, it is necessary to make the "BGM END" setting (refer to
the item below) and to activate the BGM END.
Unlike other Events* with priorities 1 – 7, the BGM Event with priority 8, once activated, is not terminated
until the BGM End is activated.
* These Events are terminated in any of the following cases:
• If an Event is activated at the control input terminal or by the VOX function, this Event is terminated when
the activation trigger is turned off.
• If an Event is activated by the ZM-9001 or ZM-9002, this Event is terminated when the control input
terminal set for "BUSY-IN" is turned off.
• When Events with higher priority level override all output channels of the Event in progress, this forcibly
terminates the original Event.
[BASE]
In this setting, multiple BGM Events are combined into one Base pattern so that they are simultaneously
activated by means of a single activation signal. To use this function, BGM Events (signal routing from input
to output) must be preset in the Route settings.
Up to 4 Route-set BGM Events can be combined into one Base pattern.
Example: Combining Route-set BGM Events Nos. 1, 2 and 3 into one Base pattern, and assigning the
Base pattern to Event No. 4
When BGM Events to which the same output channel is assigned are individually activated, their broadcast
zone depends on the priority setting (first-in-first-out priority, last-in-first-out priority, or mixing) performed in
advance for the Events.
Though BGM Events combined in a BASE pattern are activated simultaneously, the BGM Event with the
smallest input channel number is considered to have been selected first.
Example: Assigning the following two BGM Events to Event No. 3 as Base pattern.
Event 1 = Input 1 Outputs 1 and 2
Event 2 = Input 2 Outputs 2 and 3
In this example, Output 2 is duplicated. However, if system priority is set for "first-in-first-out"
priority, BGM is broadcast to the following zones because Input 1 has a priority:
Event 1 = Input 1 Outputs 1 and 2
Event 2 = Input 2 Output 3 (Continued to the next page)