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DigiDesign 888/24 I/O, Руководство по установке

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Using the 888/24 I/O

 

5

 

5. 50-pin Interface Connector

 

This 50-pin Computer connector is used to 
connect the 888/24 I/O to a MIX card, d24 
audio card, Disk I/O card, or a DSP Farm 
card. The necessary cable is supplied with 
your Audio Interface. If you plan to con-
nect two 888/24 I/O Interfaces to a MIX 
card or d24 card, a 16-channel peripheral 
cable adapter is necessary. (This cable is 
available from your Digidesign dealer.)

 

6. S/PDIF Digital Input/Output

 

The Sony Phillips Digital Interface Format 
(S/PDIF) is used in many professional and 
consumer CD players and DAT recorders. 
The 888/24 I/O S/PDIF in/out jacks are un-
balanced 2-conductor phono (RCA) jacks 
which utilize a full 24-bit digital data 
stream. To avoid RF interference, use 75-
ohm coaxial cable for S/PDIF transfers and 
keep the cable length to a maximum of 10 
meters.

Because input channels 1–2 of the 
888/24 I/O are software selectable between 
analog or digital format, input to these two 
digital channels is disabled when analog 
input is chosen or when AES/EBU digital 
format is chosen in the Pro Tools Session 
Setup window. Output is continuously ac-
tive on both the AES/EBU and S/PDIF out-
put jacks, regardless of which digital input 
format is selected for channels 1–2. To 
avoid RF interference, use 75-ohm coaxial 
cable for S/PDIF transfers and do not ex-
ceed a cable length of 10 meters.

 

7/9. Slave Clock In/Out

 

The Slave Clock Out jack is a standard BNC 
type connector that outputs a 256 times 
sample rate Super Clock signal for slaving 
and synchronizing multiple Digidesign In-
terfaces and synchronization peripherals 
together. 

When the 888/24 I/O Sync Mode is set to 
Internal, connecting a valid Slave Clock 
Out signal to this port will cause the 
888/24  I/O to automatically switch to Slave 
mode. When the 888/24 I/O is the master 
interface or the first interface in a chain, 
Digital sync mode overrides the Slave 
Clock input, and an incoming Slave Clock 
Out signal will not switch the 888/24 I/O 
to Slave mode.

Because crucial timing data is passed over 
these ports, you should use high-quality, 
75-ohm RG-59 cables for making connec-
tions, and keep total cable length to less 
than 3 meters between interfaces. 

 

8. Power Input

 

This connector accepts a standard AC 
power cable. The Interface is auto power-
selecting (100V to 240V) and will automat-
ically work with a standard modular cable 
to connect to AC power receptacles in any 
country.

Содержание 888/24 I/O

Страница 1: ...fax 650 842 7999 Technical Support USA 650 842 6699 650 856 4275 Product Information 650 842 6602 800 333 2137 Fax on Demand 1 888 USE DIGI 873 3444 World Wide Web www digidesign com Digidesign FTP Si...

Страница 2: ...was tested for CISPR compliance under conditions that included the use of peripheral devices and shielded cables and connectors between system components Digidesign recommends the use of shielded cabl...

Страница 3: ...t Sample Rate of the 888 24 I O in A D Stand Alone Mode 9 Changing the Default Word Clock Lock Port of the 888 24 I O in D A Stand Alone Mode 10 Muting the DAC Outputs of the 888 24 I O in A D Stand A...

Страница 4: ...888 24 I O iv...

Страница 5: ...endent stand alone 24 bit audio converter in your studio If you own a Pro Tools system most of the information in this guide is covered in your Pro Tools TDM Hardware Installation Guide The 888 24 I O...

Страница 6: ...rst Pro Tools card in your system This Audio Interface will act as the master inter face in your system All other Audio Inter faces will be slaved to it Because some digital audio devices do not outpu...

Страница 7: ...are monitored on screen in the Pro Tools software The 888 24 I O is factory calibrated so that a meter reading of 18 dB corresponds to the 888 24 I O nominal operating level which can be set to either...

Страница 8: ...osen for that channel The 888 24 I O analog audio connectors are balanced XLRs with pin 2 wired hot or pin 3 cold or and pin 1 ground 3 AES EBU Digital Outputs 1 8 The 888 24 I O AES EBU output jacks...

Страница 9: ...inuously ac tive on both the AES EBU and S PDIF out put jacks regardless of which digital input format is selected for channels 1 2 To avoid RF interference use 75 ohm coaxial cable for S PDIF transfe...

Страница 10: ...dBu levels it should be placed over the rear two prongs For 10 dBV levels it should be placed over the front two prongs 6 After you have made the desired changes replace the top of the 888 24 I O 7 R...

Страница 11: ...ut levels It is important that you determine which line level mode is appropriate for your stu dio In 4 dBu operating mode the 888 24 I O is a 24 bit digital audio device capable of producing audio si...

Страница 12: ...erter 1 Turn off any digital devices that may send a word clock signal to the 888 24 I O channel 1 2 digital input ports 2 Turn on the 888 24 I O The 888 24 I O searches briefly for a word clock signa...

Страница 13: ...ools Changing the Default Sample Rate of the 888 24 I O in A D Stand Alone Mode The default sample rate of the 888 24 I O in stand alone A D mode is 44 1kHz If you wish to change this default setting...

Страница 14: ...2 With a Phillips screwdriver remove the screws from the top of the 888 24 I O 3 Using the 1 16 inch hex wrench in cluded with the 888 24 I O carefully re move the front four panel screws as noted on...

Страница 15: ...tput mute setting of the 888 24 I O in stand alone D A mode 1 Make sure that your computer and 888 24 I O are turned off 2 With a Phillips screwdriver remove the screws from the top of the 888 24 I O...

Страница 16: ...888 24 I O 12...

Страница 17: ...s Sample Rate 44 1 kHz or 48 kHz 10ppm Clock Reference Super Clock 256x sample clock In Out BNC connectors additional clock refer ences supported via Digidesign s Universal Slave Driver SMPTE Slave Dr...

Страница 18: ...01dB 1kHz 20 Hz 20 kHz band limited Maximum Output Level 26 dB channel bridging loads Frequency Response 1dB 20 Hz 20 kHz Physical Specifications Power requirements 90 260 VAC 47 63 Hz 30 VA auto swi...

Страница 19: ...an interface such as the 888 24 I O the meters are calibrated in decibels below peak digital clipping level Headroom The concept of headroom is slightly differ ent for analog and digital devices Analo...

Страница 20: ...ro Tools 4 x for calibration in structions The Pro Tools Installer includes several pre configured calibration session templates that cover most common calibration set ups You can use these in additio...

Страница 21: ...gn the inputs to match the reference level When the level is properly matched the track name will stop flashing The Automatch indicator arrows on each track show the direction of adjustment re quired...

Страница 22: ...888 24 I O 18...

Страница 23: ...an interface such as the 888 24 I O the meters are calibrated in decibels below peak digital clipping level Headroom The concept of headroom is slightly differ ent for analog and digital devices Analo...

Страница 24: ...lica tion available on your Pro Tools Installer CD ROM to calibrate the outputs and in puts of the 888 24 I O If you are using Pro Tools 5 0 or later refer to Appendix B Calibrating the 888 24 I O Pro...

Страница 25: ...brate the 888 24 I O with Calibration Tool using an external source 1 Start the Calibration Tool application 2 In the Headroom field enter the amount of headroom you desire The default setting for the...

Страница 26: ...I O with Calibration Tool using an external VU meter 1 In the Calibration Tool software select 1 kHz from the Frequency pop up menu and click the oscillator setting to On 2 Adjust the 888 24 I O Outpu...

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