Smart Technologies SMART Audio 340 - Manual (Page 49)

Enabling the microphone user to change active input device volume
When your SMART Audio system is set to Auto Select, the control unit automatically detects the
active audio input. This enables the microphone user to change the volume of the active audio input
device without changing the volume of the other audio input device.
For more information on changing the volume of the audio input devices with the microphone, see
Controlling an auxiliary audio input device from your microphone on page 17.
g To enable a microphone user to change the volume of audio input devices
If you want to enable the microphone user to only change the volume of the active audio input
device, select Auto Select on the System Settings tab.
If you want to enable the microphone user to change the volume of all audio input devices, clear
Auto Select.
Setting the relay settings
You can install a relay at the room module to trigger a relay response on command, such as dimming
lights, turning on an auxiliary audio input device or sending a signal to another location.
The command to the relay trigger can be one of the following:
l
A teacher pressing the Soft button of the microphone
l
An input at the 6-12V input
l
Either the teacher pressing the Soft button or by an input at the 6-12V input
The relay can provide one of the following:
l
Latching response
l
200 ms pulse
l
400 ms pulse
l
600 ms pulse
This is a single pole, double throw (SPDT) relay with normally open (N.O.), normally closed (N.C.)
and common (COM) contacts.
A relay can be in an activated or deactivated state, as shown below.
State Relay path
Activated The N.O. contact is closed and the N.C. contact is open.
Deactivated The N.O. contact is open and the N.C. contact is closed.
C H A P T E R 5
Customizing your settings
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