92 Digital I/O Guide Digidesign 2001 Junipero Serra Boulevard Daly City, CA 94014-3886 USA tel: 650·731·6300 fax: 650·731·6399 Technical Support (USA) 650·731·6100 650·856·4275 Product Information (USA) 650·731·6102 800·333·2137 International Offices Visit the Digidesign Web site for contact information Web Site www.digidesign.
Copyright This guide is copyrighted ©2002 by Digidesign, a division of Avid Technology, Inc. (hereafter “Digidesign”), with all rights reserved. Under copyright laws, this manual may not be duplicated in whole or in part without the written consent of Digidesign. DIGIDESIGN, AVID and PRO TOOLS are trademarks or registered trademarks of Digidesign and/or Avid Technology, Inc. All other trademarks are the property of their respective owners. All features and specifications subject to change without notice.
contents Chapter 1. Introduction to the 192 Digital I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 192 Digital I/O Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 What’s Included . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 System Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
iv 192 Digital I/O Guide
chapter 1 Introduction to the 192 Digital I/O The Digidesign 192 Digital I/O is a 16-channel, all-digital audio interface for use in a Pro Tools|HD system. The 192 Digital I/O supports the major digital audio I/O formats (AES/EBU, S/PDIF, ADAT Lightpipe, and TDIF) and sampling rates of up to 192 kHz.
What’s Included • 192 Digital I/O with power cable • This guide • DigiLink cable (1.5ft. [0.46m]) • BNC cable (1.5ft. [0.46m]) System Requirements The Digidesign 192 Digital I/O requires: • A Pro Tools|HD system on a qualified Macintosh or Windows computer • Pro Tools software, version 5.3 R3 or higher About This Guide This guide provides a basic overview of the 192 Digital I/O’s features and functionality.
chapter 2 192 Digital I/O Overview 192 Digital I/O Front Panel The 192 Digital I/O has the following front panel features: 192 Digital I/O front panel Power Switch and LED Ring Loop Master LED This button turns the 192 Digital I/O on and off. The LED ring around the power button will light green to indicate that the unit has powered up successfully and is connected to an active HD system. If the LED ring is orange, the unit has power, but the computer it is connected to is shut down.
192 Digital I/O front panel Sync Mode LEDs Meters The Sync Mode LEDs indicate different clock source modes for each I/O (as set with the Clock Source choice in Pro Tools Hardware Setup dialog). These four-segment LEDs indicate signal level for each of the sixteen channels. The top row of meters indicates input levels, and the bottom row shows output levels. These meters are calibrated at –42 dB, –18 dB, –6 dB, and 0 dB, respectively. Only one HD I/O can be Loop Master at a time.
192 Digital I/O Rear Panel The 192 Digital I/O has the following rear panel features: Bay 1: Digital I/O Card (Channels 1–8) Enclosure Ports Bay 2: Digital I/O Card (Channels 9–16) 192 I/O rear panel Inputs and outputs are provided by the two Digital I/O Cards, and the built-in Enclosure ports. The two empty bays (located in the middle of the rear panel) are not expandable. The TDIF and ADAT outputs will output up to 48 kHz. The AES/EBU output can output supported sample rates from 44.1 kHz to 192 kHz.
For AES/EBU input, each Digital I/O card can accept up to 192 kHz and downsample the information to any other supported sample rate. See “Digital Format Settings and Sample Rate Conversion” on page 14. Enclosure Connectors Dual-Wire mode uses two pins to transmit a single channel, or four pins to transmit two channels of digital audio. Dual-wire is only supported via the DB-25 AES/EBU connector.
S/PDIF Digital In and Out EXT. CLOCK In and Out These are an additional pair of unbalanced, twoconductor RCA jacks that accept and output a stereo S/PDIF digital data stream. S/PDIF supports up to 24-bit audio, at sample rates up to 96 kHz. To avoid RF interference during S/PDIF transfers, use 75-ohm coaxial cable. The External Clock I/O ports are standard BNC connectors that receive and output word clock. These ports can be used to synchronize the 192 Digital I/O with any word clock-capable device.
Legacy Port This port is used to connect MIX-series Digidesign audio interfaces to the 192 Digital I/O. You can connect two eight-channel interfaces (such as the 888|24 or 882|20) or a single sixteenchannel interface (1622 I/O, 24-bit ADAT Bridge I/O, or the original ADAT Bridge I/O) for expanded input and output options, using their original cables. DigiLink cables make the vital connection between your HD Core or HD Process card and your HD ports.
chapter 3 Installation Overview Complete instructions for connecting and configuring your Pro Tools|HD system are located in the Getting Started with HD Guide. If you are connecting the 192 Digital I/O to a new Pro Tools|HD system, refer to that guide now. If you are adding the 192 Digital I/O to an existing Pro Tools|HD system, you will probably find everything you need to get up and running in this chapter.
3 Connect the DigiLink expansion cable that came with your I/O from the Expansion port on the 192 Digital I/O to the Primary port on the 96 I/O. The 96 I/O does not support 192 kHz, and you will not be able to run a session at 192 kHz unless a 192 Digital I/O or a 192 I/O is the first interface connected to the HD Core card.
To check or reconfigure I/O: 1 Start up your computer (see “Powering Up Your System” on page 11). 2 Launch Pro Tools and choose Setup > Hardware Setup. 3 Select your 192 Digital I/O in the Peripherals column, and click on the Identify checkbox. This will confirm that you have properly installed the 192 Digital I/O. You can similarly identify and verify any other connected HD I/O units by repeating these steps for each I/O peripheral.
Hardware Setup The Hardware Setup dialog lists all audio interfaces in the system, as well as I/O routing and clock selections for your HD I/Os. The Hardware Setup also allows you to set special options unique to the 192 Digital I/O. Hardware Setup automatically configures itself to default settings for each HD-series card and peripheral it detects. The Hardware Setup dialog also lets you change default settings, and configure expansion audio interfaces (including Legacy peripherals).
To configure audio interfaces: 1 In Pro Tools, choose Setups > Hardware. 2 From the Peripherals list, select your 192 Digital I/O. If you only have a single 192 Digital I/O in your system, it will already be selected by default. 3 Make sure Main tab is chosen. When the Hardware Setup dialog is open, the Left and Right arrows scroll through the tabs; the Up and Down arrows scroll through the Peripherals list. 4 From the Digital Format radio buttons, select the desired format for the enclosure digital I/O.
Digital Format Settings and Sample Rate Conversion The following example shows how to configure an HD system with one 192 Digital I/O and one 96 I/O in the Hardware Setup dialog: To configure digital formats and sample rate conversion: 1 From the Peripherals list, choose the 192 Digital I/O (which must be your primary I/O for any sample rates higher than 96 kHz). By default, the Main tab will be selected, and options and controls for the selected I/O will be available.
Configuring I/O Setup I/O Setup dialog provides tools to label and map Pro Tools input, output, bus, and insert signal paths. To route Pro Tools channels to multiple 192 Digital I/O outputs: 1 In the Hardware Setup dialog, click the pop-up menu for the Pro Tools output pair you wish to multi-assign (for example, 1–2, 3–4, 15–16). By default, all pairs are assigned to a 192 Digital I/O output pair; Outputs 1–2 are by default mirrored to the two-channel Digital [Encl] pairs.
Synchronization Mode and Clock Source The 192 Digital I/O lets you synchronize your Pro Tools|HD system to most digital clock references in use in today's complex, multi-unit production environments. The Hardware Setup dialog lets you specify among digital input sources and select a Clock Source. Choices for Clock Source vary depending on Sample Rate and Digital Format (AES/EBU, S/PDIF, or Optical S/PDIF).
For example, to record digitally from an optical S/PDIF device connected to the Enclosure Optical In port, enable the Optical (S/PDIF) option for Digital Format. INT (Internal) This is the 192 Digital I/O standard clock setting. In this mode, the 192 Digital I/O sample clock is generated by its internal crystal oscillator, as determined by the session Sample Rate.
If at least two channels are not assigned from the selected digital port in the Main page of the Hardware Setup dialog, or if no valid clock source is detected at this port, 192 Digital I/O will switch to INT and the DIG LED will flash. LOOP (Loop Master) This LOOP LED indicates that the 192 Digital I/O is synchronized to another HD I/O through Loop Sync. By default, until you select another HD I/O by selecting its Clock Source, the Loop Master will be the HD I/O connected directly to the HD Core card.
appendix a Card Removal and Replacement Removing an I/O Card In the event of a problem with either of the digital I/O cards in your 192 Digital I/O, you can remove the card and send it to Digidesign for repair. The modular nature of the HD system allows you to simply return the specific card, instead of the entire 192 Digital I/O. Your HD system will continue to function while missing a single card. It will not function if more than one of the factory-installed cards is removed.
Hardware Setup Changes 6 Look into the empty bay to locate the guide rails for the card to slide in on. . Removing a Card In this case, the Hardware Setup dialog will reflect the change by setting the removed inputs and outputs to None. The remaining inputs and outputs will function normally. For example, if you remove one of the Digital I/O cards, the second Digital tab will disappear from the Hardware Setup dialog.
9 Locate the raised ridge in the middle of the 50pin cable which connects to the 192 Digital I/O chassis. This ridge is only on one side of the connector, and there is a matching groove on only one side of the 50-pin connector on the card. 14 When you power on the unit, the power LED should turn orange. 15 Start up the computer. 16 When you boot up the computer, the power ring should turn from orange to green. – or – If it doesn’t, see “Troubleshooting” on page 21.
22 192 Digital I/O Guide
appendix b Pinout Diagrams for the DB-25 Connectors AES/EBU DB-25 1-2 RCV 3-4 RCV 5-6 RCV 7-8 RCV 1-2 XMT 3-4 XMT 5-6 XMT 7-8 XMT CH12_RCV_HOT CH12_RCV_COLD CH12_RCV_GND CH34_RCV_HOT CH34_RCV_COLD CH34_RCV_GND CH56_RCV_HOT CH56_RCV_COLD CH56_RCV_GND CH78_RCV_HOT CH78_RCV_COLD CH78_RCV_GND CH12_XMT_HOT CH12_XMT_COLD CH12_XMT_GND CH34_XMT_HOT CH34_XMT_COLD CH34_XMT_GND CH56_XMT_HOT CH56_XMT_COLD CH56_XMT_GND CH78_XMT_HOT CH78_XMT_COLD CH78_XMT_GND 24 12 25 10 23 11 21 9 22 7 20 8 18 6 19 4 17 5 15
TDIF DB-25 CH12_RCV_DATA GND1 3-4 CH34_RCV_DATA GND2 5-6 CH56_RCV_DATA GND3 7-8 CH78_RCV_DATA GND4 1-2 CH12_XMT_DATA GND5 3-4 CH34_XMT_DATA GND6 5-6 CH56_XMT_DATA GND7 7-8 CH78_XMT_DATA GND8 RCV CLK+CTRL RCV_LRCK RCV_EMPHASIS RCV_FS1 RCV_FSO XMT CLK+CTRL XMT_LRCK XMT_EMPHASIS XMT_FS1 XMT_FSO XMT DATA RCV DATA 1-2 GND9 MH1 MH2 13 25 12 24 11 23 10 22 1 14 2 15 3 16 4 17 9 21 8 20 5 18 19 6 7 26 27 NC= NC= NC= DB25F_RA_TDIF FB30 FB31 22PF 22PF GND_C GND_C 24 192 Digital I/O Gui
index Numerics 192 I/O Back Panel 5 Front Panel 3 Overview 3 Digital Input format 17 Digital mode 17 Digital tab 14 DigiTest 10 E A AC Power connector 7 Accessory Port 8 AES/EBU 5 B BNC cable 10 C Clock Source 7, 13, 16, 17, 18 and Loop Master 16 and Synchronization mode 16 pop-up menu 16 Connecting the 192 I/O to an Existing HD System 9 D DB–25 connectors 5 DIG (Digital) mode 17 DigiLink cable 9 connections 9 Length Specifications 8 DigiLink Connections 8 Guidelines for 9 DigiSetup file 11 Digital Fo
L P LED ring 3 legacy I/O Setup 14 peripheral port limitations 8 port 8 Lightpipe Optical port 6 Loop LED 10, 18 Master 3, 4, 18 Master LED 18 mode 18 Slave mode 4 Loop Master 16 and Clock Source 16 Clock Source and 16 LED 3, 4, 16 mode 3 Loop Sync 10 chain 10 Connections 10 sample rates 7 Peripherals list 14 Pinout Diagrams 23 Playback Engine 3, 17 Power Switch and LED ring 3 power up 11 Powering Up Your System 11 Primary audio interface 9 DigiLink 7 M Meters 4 MIX-series 8 multiple outputs 15 routing