92 I/O™
Legal Notices Warning This guide is copyrighted ©2007 by Digidesign, a division of Avid Technology, Inc. (hereafter “Digidesign”), with all rights reserved. Under copyright laws, this guide may not be duplicated in whole or in part without the written consent of Digidesign. This product contains chemicals, including lead, known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.
Important Safety Instructions When using electric or electronic equipment, basic precautions should always be followed, including the following: • Read all instructions before using this equipment. • To avoid the risk of shock, keep this equipment away from rain water, and other moisture. Do not use this equipment if it is wet. • The equipment should only be connected to the correct rating power supply as indicated on the 192 I/O. • Do not attempt to service the equipment.
contents Chapter 1. Introduction to the 192 I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 What’s Included . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 System Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 About This Guide. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
vi 192 I/O Guide
chapter 1 Introduction to the 192 I/O The Digidesign 192 I/O™ 16-channel digital audio interface is for use in a Pro Tools|HD system and features 24-bit analog-to-digital (A/D) and digital-to-analog (D/A) converters. The 192 I/O supports sample rates of up to 192 kHz for superior dynamic range and low noise floor. 192 I/O Features • 16 discrete channels of input and output, with 4-segment LED Meters to monitor input and output on each channel.
System Requirements The Digidesign 192 I/O requires a Digidesignqualified Pro Tools|HD system. Conventions Used in This Guide Digidesign guides use the following conventions to indicate menu choices and key commands: : Compatibility Information Convention Action Digidesign can only assure compatibility and provide support for hardware and software it has tested and approved.
About www.digidesign.com The Digidesign website (www.digidesign.com) is your best source for information to help you get the most out of your Pro Tools system. The following are just a few of the services and features available. Product Registration Register your purchase online. See the enclosed Digidesign Registration Information Card for instructions.
4 192 I/O Guide
chapter 2 192 I/O Overview This chapter describes the front and back panel features of the 192 I/O. See the Pro Tools|HD Getting Started Guide for complete system installation and configuration instructions. If you are adding the 192 I/O to an existing system, see the Expanded Systems Guide. 192 I/O Front Panel 192 I/O Front Panel Power Switch and LED Ring Sample Rate This button turns the 192 I/O on and off. These LEDs display the current sample rate of the 192 I/O internal crystal oscillator: 44.
Loop Master LED The LOOP MASTER LED indicates which Pro Tools|HD audio interface is the master Pro Tools peripheral. The Loop Master LED will be continuously lit on the current Loop Master peripheral only, and unlit on all other peripherals. (Only one Pro Tools|HD I/O can be Loop Master at a time.) The Loop Master LED will always be lit with a single interface. Loop Master defaults to the first Pro Tools|HD peripheral connected to the primary, or “core” Pro Tools|HD card.
192 I/O Back Panel Bay 1: Analog In Card Bay 3: Digital I/O Card Enclosure Empty Bay for Optional Card Bay 2: Analog Out Card 192 I/O back Panel Although the 192 I/O is a 16-channel audio interface, it has up to 50 inputs and outputs available through its various back panel connectors. Input and Output Cards The 192 I/O features four bays for I/O cards. Bays 1–3 contain Analog In, Analog Out, and Digital I/O cards, respectively.
Input Trims Digital I/O Two dedicated Input Trims per analog input channel provide further calibration options and flexibility. Depending on how you utilize the two DB–25 input ports, you can use the A and B trim settings for numerous applications. See “Input Trims” on page 11. This section contains connectors for eight channels each of AES/EBU I/O, TDIF I/O, and Optical (ADAT) I/O. Only one digital format can be used at a time. In addition, the soft-clip limiter function helps avoid digital clipping.
Enclosure Connectors Optical (ADAT) [Encl] The right half of the back panel of 192 I/O features a set of non-removable connectors that are mounted to the enclosure. These are Optical ports that accept up to eight channels of Optical (ADAT) input and output, or two channels (stereo) optical S/PDIF input and output. Optical (ADAT) mode supports sample rates up to 48 kHz. In TOS-Link mode, supports two-channel Optical input and output at sample rates up to 96 kHz.
EXT. CLOCK In and Out DigiLink Length Specifications The External Clock I/O ports are standard BNC connectors that receive and output a word clock signal. These ports can be used to synchronize the 192 I/O to any device that requires (or provides) word clock. There are five different lengths of DigiLink cables. External Clock In and Out are configured by your choice for Clock Source in Pro Tools.
Legacy and Expansion Peripheral Port Limitations Because both the Legacy port and the Expansion port use channels 17–32, you can only use one at a time. The Legacy port is not available in any session in which the sample rate is set for higher than 48 kHz. Accessory Port This port is not supported.
Soft Clip Limiting The 192 I/O provides an optional “soft” limiter for each input. The Soft Clip limiter can be used to attenuate incoming analog signals to provide extra protection from temporary clipping transients and digital distortion. With Soft Clip enabled, 192 I/O supports an additional 4 dB of headroom by rounding off the top 4 dB to the clip point. For more information on Soft Clip Limiting and other 192 I/O settings, see the Pro Tools|HD Getting Started Guide.
appendix a Adding or Removing I/O Cards The 192 I/O comes with one available expansion bay on the back of the unit. This bay lets you add another 192 AD Card, 192 DA Card, or 192 Digital Card (all sold separately) to increase the amount of available I/O on the unit. Installing an I/O Card Installing an optional card in the expansion bay To insert or replace a card: The expansion bay is the only bay that allows for another card.
4 Lift off the top of the 192 I/O and set it aside. 5 Remove the five screws on the cover over the empty bay. Do not misplace these screws; note that they are a different size and shape from the top cover screws. guide rails Placing the edge of the card into the guide rails 7 Slide the edges of the card into the guide rails on each side of the bay. 8 Gently push the card back into the bay, lifting slightly to keep components underneath the card from touching the back panel.
10 Locate the raised ridge in the middle of the 50-pin cable which connects to the 192 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 Connect the 192 I/O to your Pro Tools|HD system. 15 Power on your 192 I/O. 16 When you power on the unit, the power LED should turn orange. 17 Start up the computer. 18 When you boot up the computer, the power ring should turn from orange to green.
Hardware Setup Changes After Adding a Card The additional inputs and/or outputs provided by the new card will appear in the Hardware Setup dialog, with the same controls and parameters as for the original card of the same type. For example, if you add an Analog Input card to the original three cards, a second Analog Input tab will appear in the Hardware Setup dialog.
6 Pull the card out by gripping the edges between your thumb and forefinger. Pull straight back, lifting very slightly to avoid contact between components on the underside of the card and the 192 I/O back panel faceplate. When you pull a card out, pay particular attention to keeping components on the surfaces of the card from bumping into any of the internal components or the back panel faceplate on the 192 I/O.
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appendix b Pinout Diagrams for the DB-25 Connectors Analog Output DB-25 Analog Input (+4 dBu) DB-25 +4" Analog Outputs 1 2 3 4 5 6 7 8 CH1_HOT CH1_COLD CH1_GND CH2_HOT CH2_COLD CH2_GND CH3_HOT CH3_COLD CH3_GND CH4_HOT CH4_COLD CH4_GND CH5_HOT CH5_COLD CH5_GND CH6_HOT CH6_COLD CH6_GND CH7_HOT CH7_COLD CH7_GND CH8_HOT CH8_COLD CH8_GND NC_1 MH1 MH2 24 12 25 10 23 11 21 9 22 7 20 8 18 6 19 4 17 5 15 3 16 1 14 2 13 26 27 1 2 3 4 5 6 7 8 CH1_HOT CH1_COLD CH1_GND CH2_HOT CH2_COLD CH2_GND CH3_HOT CH3_COLD C
Analog Input (–10dB(V)) DB-25 1 2 3 4 5 6 7 8 20 192 I/O Guide CH1_HOT CH1_COLD CH1_GND CH2_HOT CH2_COLD CH2_GND CH3_HOT CH3_COLD CH3_GND CH4_HOT CH4_COLD CH4_GND CH5_HOT CH5_COLD CH5_GND CH6_HOT CH6_COLD CH6_GND CH7_HOT CH7_COLD CH7_GND CH8_HOT CH8_COLD CH8_GND NC_1 MH1 MH2 24 12 25 10 23 11 21 9 22 7 20 8 18 6 19 4 17 5 15 3 16 1 14 2 13 26 27 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_GN
XMT DATA RCV DATA TDIF DB-25 1-2 3-4 5-6 7-8 1-2 3-4 5-6 7-8 RCV CLK+CTRL XMT CLK+CTRL CH12_RCV_DATA GND1 CH34_RCV_DATA GND2 CH56_RCV_DATA GND3 CH78_RCV_DATA GND4 CH12_XMT_DATA GND5 CH34_XMT_DATA GND6 CH56_XMT_DATA GND7 CH78_XMT_DATA GND8 RCV_LRCK RCV_EMPHASIS RCV_FS1 RCV_FS0 XMT_LRCK XMT_EMPHASIS XMT_FS1 XMT_FS0 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 GND_A GND_C GND_A Appendix B: Pinout D
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appendix c 192 I/O Calibration Mode Instructions Before you use the 192 I/O audio interface, you may want to calibrate its input and output levels to the level of your mixing console. The 192 I/O has +4 dBu and –10 dB(V) inputs, and +4 dBu outputs, each with their own trim pots for proper calibration. The 192 I/O is factory-calibrated so that its +4 dBu input operating level is set for 18 dB headroom above +4 dBu (maximum input/output +22 dBu).
Digital With a digital recording device such as the 192 I/O, in order to allow for headroom, you must align a 0 VU tone from the console to a value less than zero (or below dB full scale [–x dBFS]) on the 192 I/O, by exactly the amount of headroom that you want. For example, to have 12 dB of headroom above 0 VU with the 192 I/O, you must align the incoming 0 VU 1kHz tone to a level of –12 dBFS. For 18 dB of headroom, you would align it to –18 dBFS.
13 Create an additional mono Auxiliary Input track for each input you want to calibrate. Set the input assignment for each of these Auxiliary Inputs to its respective I/O input. Then set the output of each of these Auxiliary Inputs to an unused bus pair (for example Bus 3–4). In the template session the bus names are Null and Out. This makes sure feedback doesn’t occur when monitoring main outputs 1–2. 14 Connect an external VU meter to each of the I/O outputs in turn. (One at a time as you calibrate.
When you have properly aligned the incoming peak signal levels to match the calibration reference level, both Automatch indicator arrows will light: the up arrow red and the down arrow blue. Above the fader is a peak volume indicator. This indicator will show the dB level above and below your chosen headroom value. If the peak indicator is showing –19.1, you are –1.1 dB below a headroom value of –18 dB. If the display is showing –16.5, you are +1.5 dB above your headroom value of –18 dB.
index Symbols C +4 dBu 7, 8, 11 calibrate 24 calibrating the 888/24 I/O 24 calibration 11 Cards I/O 7 cards Analog In 7 Analog Out 7 Digital I/O 7 removal 16 clipping 23 Clock Source 10 connecting a mixer 11 Numerics –10 dBV 7, 8, 11 192 I/O Back Panel 7 Front Panel 5 Overview 5 96 I/O and level calibration 26 A A/D converters 7 AC Power connector 10 Accessory Port 11 Adding I/O Cards 13 AES/EBU 8 In/Out 9 Analog In card 7 Analog Input 7 (+4 dBu) DB-25 19 (+4 dBu) DB-25 Pinout Diagram 19 (–10dBV) DB-2
E AES/EBU AES/EBU 9 Enclosure Optical (ADAT) 9 Connectors 9 Expansion DigiLink 10 Peripheral Port Limitations 11 port 10 expansion bay 13 External Clock 10 I/O ports 10 In 6 port 6 H Hardware Setup 5, 7 headroom 12 adjustable settings 11 settings 8 Soft Clip limiter and 12 I I/O Cards Adding or Removing 13 Input Cards 7 Input Levels 11 Input Trims 7, 11 inputs calibrating 24 Internal clock mode 6 (INT) 6 Loop Master 6 Master LED 6 mode 6 Loop Master LED 6 mode 6 Loop Sync 6 sample rates 9 M Meters 6 MIX
S S/PDIF In/Out 9 Sample Rate 5 conversion 8 conversion, AES/EBU 12 conversion, Optical (ADAT) 12 conversion, TDIF and Optical (ADAT) 12 Session 6 Soft Clip limiter 12 and headroom 12 Sync Mode LEDs 6 synchronization 10 T TDIF 8 TDIF DB-25 Pinout Diagram 21 TOS-Link Optical port and 9 Trims Input 8 Output 8 Troubleshooting 16 W word clock 6, 10 Index 29
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