Installation guide

NOTE: The Remote Audio Device status indicators on the front panel differ from those on the rear

panel. The front panel LEDs provide information about signal activity on each audio channel. See

the Front Panel description for more details.

4. Expansion Bus Jacks and Link LED

Use one of these jacks to connect the EXP1x to the HAL1x, using a shielded CAT 5e (or better) cable.

Use the other jack to connect the EXP1x to another Expansion Unit, thus forming a daisy chain.

The Link LED lights when the HAL1x is communicating with the EXP1x.

5. Remote Audio Device Ports

Use these ports to connect each RAD to the EXP1x via a shielded CAT 5e (or better)cable. You must use

a shielded Ethernet cable for this connection. There are 8 RAD ports on an EXP1x device.

Front Panel

1. Remote Audio Devices LEDs

Provide information about the RAD audio channels. The numbers 1 through 8 at the top of the front panel

correspond to the RAD ports 1 through 8 on the back of the EXP1x. For example, the LEDs for number 1

provide information about the RAD connected on port 1.

Under each RAD number are LEDs for four audio channels, two input and two output. These represent

the maximum number of channels a RAD is capable of transporting. However, not all RAD models use all

four channels. For example, the RAD1 model provides two microphone inputs, so for that model, only the

two columns of indicators labeled IN would be active.

These LEDs provide information on the following:

Overload LED (red)–indicates that the channel is experiencing a signal overload

Signal LED (green)–indicates the presence of an audio signal on this channel

Enabled LED (yellow)–indicates the availability of the associated audio channel. If a RAD is con-

nected on this port and all Enabled lights are off, this indicates a problem with the shielded CAT

5e connection or with the RAD. If the Enabled LEDs are flashing, this indicates that the physical

RAD model does not match the RAD model specified for this port in the HAL configuration.

2. Expansion Bus LED

If lit, indicates that the Expansion Unit is properly connected to the HAL. If Expansion Units are properly

connected to one another and to the HAL port yet this status LED remains dark, there is likely a problem

with the connection between the last device in the chain (HAL or Expansion Unit) where this LED is lit

and the first Expansion Unit in the chain where this LED remains dark.

3. Locate and Power LEDs

CHAPTER 2: Introduction to the HAL System