NOTE: In Halogen version 5.0.1 and later, you cannot create a new configuration for the unsupported HAL1
device.
Remote Audio Devices
The primary purpose of a Remote Audio Device (RAD) is to amplify, digitize, and transmit a digital audio signal
via shielded CAT 5e cable to a HAL host device. RADs can also receive a digital signal from the HAL and then
convert it to analog before sending it to its attached audio equipment. RADs are capable of transmitting and receiv-
ing up to four channels of digital audio (two in each direction). To better fit your needs, however, Rane offers var-
ious RAD models. Most RAD models are designed to fit in a standard U.S. two, three, or four gang switchbox.
The HAL System offers a variety of RAD models, each of which serves a unique purpose. For example, a RAD1
contains two microphone input channels. When you design an audio system, you choose the RAD models that are
appropriate for your application. You must then provide configuration information to HAL so that it knows which
RAD models to expect on each port and what information to send to each RAD. For more information, see "Avail-
able RADModels" in the Halogen Help System. You can also read about the available RAD models on the Rane
website.
How the shielded CAT 5e Cabling is Utilized
The shielded CAT 5e cable that connects the RAD to HAL also provides power to the RAD as well as a path for
data communications. Data communications makes it possible to control the RAD’s configuration settings, view
status information, and update a RAD’s firmware – all from the host HAL device. The following picture illustrates
how the four twisted pairs within the shielded CAT 5e cable are utilized.
CHAPTER 2: Hardware Component Details
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