10.
Logic In ports
Use these TTL 5-volt digital logic input ports to communicate to the HAL System via an exter-
nal control device. You can configure each Logic In port to control a selector, toggle, or com-
mand within the HAL System. For example, you might use a Logic In port to select between
two audio channels, or to mute the whole system.
11.
Mic/Line Input ports
Use these ports to connect up to 8 analog microphones or line input devices. Note that the Mic
In ports support phantom power.
12.
Line Output ports
Use these ports to connect up to 8 analog line output devices, such as amplifiers.
Front Panel Description
1.
Mic/Line Inputs LEDs
Provides status information about the mic/line analog inputs connected to the HAL. The
numbers 1 through 8 correspond to the mic/line input ports 1 through 8 on the rear panel.
These LEDs provide information on the following:
l
Overload LED
(red) – indicates that the mic/line input is experiencing a signal overload
l
Signal LED
(green) – indicates the presence of an audio signal on the mic/line input
2.
Line Outputs LEDs
Provides information about the HAL analog outputs. The numbers 1 through 8 correspond to
the line output ports 1 through 8 on the rear panel.
These LEDs provide information on the following:
l
Overload LED
(red) – indicates that the line output is experiencing a signal overload
l
Signal LED
(green) – indicates the presence of an audio signal on the line output
3.
Digital Remotes LEDs
Indicates which Digital Remotes are enabled. Each numbered LED corresponds to the Digital
Remote port with the same number. If a Digital Remote is connected on a port but its Enabled
LED is off, there is likely a problem with the CAT 5 connection or with the Digital Remote
itself. If an Enabled LED is flashing, it indicates that the physical Digital Remote model does
not match the Digital Remote model specified for this port in the HAL configuration.
CHAPTER 2: Hardware Component Details
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