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I. Basic Description
Basic Description by model number:
ATB-300-1 4 – AES I/O Digital only switcher/router
ATB-300-2 4 – AES I/O and 4 -analog L/R input switcher/router
ATB-300-3 4 - AES I/O and 4 - analog L/R output switcher/router
ATB-300-4 4 – Analog only I/O
ATB-300-5 4 - AES I/O, 4 – analog L/R balanced I/O
ATB-300-6 8 – AES I/O
ATB-300-7 8 – Analog Input 4 Analog Output
ATB-300-8 8 – Analog I/O
ATB-300 DAS – Special Configuration for use with Digital Alert Systems DASDEC EAS
System – 4 individual A/B switchers AES and or Analog I/O – Call for configuration
information
ATB-300 is a 4 or 8 channel stereo analog / digital audio switcher featuring silence
detection and automatic switching. Input and output types are defined by the model
number as shown above. The ATB-300 can be used to manually switch inputs or will
automatically switch when a programmable silence interval of between 30 and 600
seconds is detected. Auto switching is programmed using a “priority list” of 4 or 8
memories depending on configuration which are programmed with input channels to
search for audio in order of preference. The ATB-300's intelligent search algorithm
constantly monitors the inputs to allow immediate switching to the first active channel in
the priority list without need to sequence through inactive channels when silence.
II. ATB-300 Operational Mode Descriptions
ATB-300 Manual Mode
The ATB-300 defaults to MANUAL mode upon power up. The LCD display will indicate
the manual mode as well as the currently selected input channel and the active /
inactive status of that input on the top line. The lower line indicates the channel that will
be switched to the outputs when the green ENTER (check mark) key is pressed. The
UP and DOWN arrows are used to select the input channel. The activity status of that
channel is also shown to avoid switching to an inactive channel. When the select key is
pressed the new selection is stored to memory and the audio is switched. This setting is
NON VOLATILE. If the ATB-300 is power cycled this channel will be selected on power
up.
