Rane HAL1x Design Guide - Page 25
Remote Audio Devices, How the shielded CAT 5e Cabling is Utilized
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CHAPTER 2: Introduction to the HAL System 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 receiving up to four channels of digital audio (two in each direction). To better fit your needs, however, Rane offers various 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 "Available RAD Models" 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. 21