Technical data

ASTi DACS: Operation & Maintenance Manual (Version 4, Rev. B.1) www.asti-usa.com

DACS Hardware Components

The 2U and 4U DACS processing nodes consist of a number of hardware components, and can be

conﬁgured in many different ways depending on the requirements of the particular application.

Components available include the main model processor, various audio processors such as Wave-

form Synthesizers, TDM controllers, Remote Interface Units, Distributed Digital Interfaces, net-

work interfaces such as the Host Interface and DIS/HLA Interface, and general purpose I/O

including Digital Inputs, Digital Outputs, and Analog Inputs.

The MicroDACS uses a single TDM controller, Remote Interface Units, Distributed Digital Inter-

faces, and a dual network interface card.

These components are discussed in more detail in the following sections.

Engineering drawings are supplied with each DACS which identify the overall system conﬁgura-

tion as well as each line-replaceable component. Additional documentation is included with indi-

vidual Remote Interface Units and Distributed Digital Interfaces.

Chassis

The 2U and 4U chassis are supplied with rackmount brackets for mounting in a 19”-wide rack.

The power switch, ﬂoppy drive, and reset switch on the front of the chassis; monitor, keyboard

and power cord connectors are in the back.

All 2U and 4U chassis come with PCI backplanes to support 10/100Mbs auto-sensing ethernet

cards.

The MicroDACS can be rackmounted using a 2U-high bracket, which accommodates two (2)

MicroDACS’, and must be purchased separately.

Power Supply

Power supply speciﬁcations may vary slightly between platforms. In general, however, the power

supply is a standard 250 watt PC-style power supply. The supply accepts 120V/60Hz, and can

also be conﬁgured to accept overseas voltages such as 220V/50Hz. Some platforms contain a

switch on the rear of the chassis in the vicinity of the power supply which must be set for the

proper voltage. Other systems will have an autosensing supply indicated by a label on the rear of

the chassis.

Model Processor

The model processor is the main processing unit for the DACS processing node. In 2U and 4U

systems, the model processor includes the chassis, power supply, hard drive, ﬂoppy drive, and

CPU.

CPU type, memory size, and hard disk size vary from system to system. Consult your DACS engi-

neering drawings to determine the conﬁguration of the model processor installed in your system.

ASTi’s Model Builder model generation software as well as support software such as a DOS oper-

ating system and disk caching routines are installed and operate on the model processor.

During DACS operation, the model processor runs the Model Builder software environment and

the audio simulation models developed by the user.