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Chapter 4: Using the USD

chapter 4

Using the USD

Control Options

The USD can be controlled in three ways:
• from within Pro Tools
• using the front panel controls
• using USD Setup

Which methods you will use depends on
the type of Pro Tools system being used, if
any, and its serial connection between the
USD and your system

Pro Tools MIX/MIXplus and
Pro Tools 24 Systems

DigiSerial Port-equipped systems can use
Pro Tools and the front panel to control
USD. USD Setup can optionally be used for
access to specific features described
throughout this chapter.

Pro Tools III Systems

Pro Tools III and other systems without a
DigiSerial Port connection can use
Pro Tools and the front panel, or
USD Setup software.

Standalone

Remote installations (no connections to a
computer) will use the USD front panel
switches and displays.

USD Standalone with Remote Control

For software remote control from a sup-
ported Macintosh or Windows computer,
USD Setup provides access to all USD pa-
rameters.

For a listing of USD parameters supported
in each method, see “USD Controls in
Pro Tools, USD Setup, and Front Panel” on
page 28.

Summary of Contents for Digidesign USD

Page 1: ...fax 650 842 7999 Technical Support USA 650 842 6699 650 856 4275 Product Information USA 650 842 6602 800 333 2137 Fax on Demand USA 1 888 USE DIGI 873 3444 World Wide Web www digidesign com Digidesign FTP Site ftp digidesign com Universal Slave Driver User s Guide Version 5 0 1 ...

Page 2: ... 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 PN 932707422 00 Rev A 5 00 ...

Page 3: ...alling the USD 7 Connecting USD to a Computer 7 Connecting USD to Pro Tools 10 Connecting AC Power 10 Connecting Machines Decks and Other Devices 11 Software Installation 13 Getting Started 13 Updating USD Firmware 14 Configuring OMS 15 Troubleshooting 16 Chapter 3 USD Hardware and Software Overview 17 USD Front Panel 17 USD Rear Panel 20 USD Setup Software 22 ...

Page 4: ...generating Time Code 44 Generating a Window Burn 51 Chapter 5 Additional Operational Information 55 Front Panel Generator Parameter Controls 55 Managing and Selecting Video Inputs 61 Using Fader Start 63 Calibrating the USD Oscillator 64 Restoring Factory Settings 65 Appendix A Additional Synchronization Information 67 Appendix B Technical Specs 73 Appendix C Wiring Diagrams Pin Assignments 81 Ind...

Page 5: ...d time code char acter generator Throughout this guide the term standalone refers to systems utiliz ing USD but not using Pro Tools USD Setup USD Setup is a remote control application for the USD USD Setup can be used with or without Pro Tools on any supported Mac intosh or Windows computer System Requirements Macintosh Pro Tools Systems Digidesign qualified Macintosh com puter 17 inch or larger c...

Page 6: ...ements on page 2 for details USD Serial Port Requirements Pro Tools MIX MIXplus and Pro Tools 24 Systems The USD must be connected to the DigiS erial Port on the Digidesign MIX or d24 card if multiple use the card in the lowest slot USD with the G3 and G4 Under certain circumstances for example when running the USD Setup utility appli cation the USD must be connected to a conventional serial port ...

Page 7: ...dalone with Remote Control For software remote control using the USD Setup application see USD Setup on page 3 USD Cables USD Serial Cable A USD Serial cable is in cluded to connect the USD to a Macin tosh or Windows based Pro Tools DigiSerial Port Pro Tools MIX MIXplus or Pro Tools 24 systems This cable can also be used to connect the USD to r a Macintosh serial port or equivalent serial port ada...

Page 8: ...st from your system Important Notices include information that could affect your data or the performance of your system Cross References point to related sections in other Digidesign guides USD Synchronization Support Supported Positional Reference Sources LTC VITC Bi Phase Tach Internal Time Code Generator Serial Time Code requires Digidesign s MachineControl option and Pro Tools software version...

Page 9: ...DI Time Code MTC Other Features Front panel controls and a large LED dis play of time code and parameters Integrated control of USD from Pro Tools Time Code Character Generator Fader start provided through GPI out put for remote transport control from select Pro Tools fader movement USD Setup software for Macintosh and Windows USD firmware that can be updated at any time for future upgrades ...

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Page 11: ...Setup require a connection to a Mac intosh serial port or Windows COM port Firmware updating is explained in Updat ing USD Firmware on page 14 In addition USD Setup can be used for soft ware remote control of all USD features USD Setup requirements are listed in Soft ware Installation on page 13 About the USD Serial Cable The USD includes a 4 meter approximately 12 foot cable designed to connect t...

Page 12: ...erface or HUI to a GeeThree or Griffin serial port adaptor see USD Serial Port Require ments on page 2 DigiSerial Port General Info Pro Tools MIX and d24 cards feature a DigiSerial Port Though this port is identi cal in appearance to the serial ports on your CPU it is designed to only be used for the USD proprietary serial connection or a serial to 9 pin cable in combination with the MachineContro...

Page 13: ...the modem or printer port or serial port adaptor of your Macintosh 4 Restore power to the USD and restart your computer 5 Connect the rest of your equipment to the USD as described in the following sec tions of this chapter 6 Install USD Setup see Software Installa tion on page 13 USD Setup USD Setup requires a serial connection from the USD to a Macintosh or Windows computer For compatibility inf...

Page 14: ...ve Clock connection from the USD to a single Pro Tools audio interface Computer 1 ANALOG OUTPUT ANALOG INPUT AES EBU OUTPUT AES EBU INPUT Computer 2 8 CH Mode 2 x 4 CH Mode S PDIF IN S PDIF OUT SLAVE CLOCK IN SLAVE CLOCK OUT 7 8 5 6 3 4 1 2 7 8 5 6 3 4 1 2 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 MTC OUT MAC SERIAL 85 264VAC 47 63HZ 115 W PC SERIAL BI PHASE TACH GPI VIDEO REF 9 PIN OUT 9 PIN IN ACC WORD CL...

Page 15: ...video signal to the USD Video Ref In port 2 Use another BNC cable to connect the USD Video Ref Thru port to the Video In port 3 Connect the USD Video Out port to other video devices Connecting LTC The USD provides LTC input and output connectors To Input LTC to the USD Connect the LTC signal from your ma chine synchronizer or other source to the USD LTC In port To output LTC from the USD Connect t...

Page 16: ...ro Tools 4 1 and earlier a MIDI In terface and OMS were required for Pro Tools to recognize the USD as a ge neric synchronization device If you need to supply MTC from the USD to another MTC compatible device connect the device as described below To connect an MTC compatible device to receive MTC from USD Connect the USD MTC Out port to the appropriate MIDI input on the device using a standard MID...

Page 17: ...endent of Pro Tools Pro Tools III Systems Check to make sure you have already in stalled the most recent Pro Tools and USD Setup software from your Pro Tools In staller CD ROM Optionally USD Setup can be installed to provide access to the complete set of USD parameters and for remote control of USD independent of Pro Tools USD Setup To install USD Setup 1 Make sure the USD is connected to your com...

Page 18: ...ccording to the instructions in Connecting USD to a Computer on page 7 2 Launch USD Setup 3 Choose Preferences USD Setup Prefer ences 4 If not already selected choose the appro priate serial port for your USD to CPU con nection 5 Close the Preferences window Updating USD Firmware The USD contains a flash EEPROM that al lows you to update the firmware in your unit at any time As Digidesign continue...

Page 19: ...Click Update USD Firmware 4 Follow the instructions on screen to complete the update Configuring OMS Macintosh Only If you are not using the USD Mac Serial port to connect USD to a DigiSerial Port or CPU serial port then you will need to define an OMS device for Pro Tools so that Pro Tools can receive MTC from the USD This ap plies only to Pro Tools 4 1 and earlier An OMS device is not required fo...

Page 20: ...n to deactivate this con nection 7 If necessary select the appropriate MIDI port for USD Troubleshooting This section describes common synchroni zation problems and some possible solu tions Status LEDs The status LEDs LOCKED and SPEED CAL on the USD Front Panel may help you iso late potential problems See 11 Status LEDs on page 19 for details about these in dicators and their meaning Use the Curre...

Page 21: ...wn USD power is on Up O power is off 2 Clock Reference Switch Selects the USD clock reference with green LEDs Clock References VIDEO LTC DIGITAL PILOT BI PHASE TACH INTERNAL VSO 3 Clock Reference LEDs Green LEDs display the active clock refer ence as selected with the Clock Reference Switch Figure 1 USD Front Panel CLOCK REFERENCE FRAME RATE VIDEO LTC DIGITAL PILOT 30 29 97 25 24 UNIVERSAL SLAVE D...

Page 22: ...ours minutes seconds frames Decimal points indicate additional time code infor mation Odd even field distinction is indicated using a decimal point to the right of the frames display A lit decimal point to the right of frames indicates an even num bered field no decimal point indicates odd numbered When the USD is in Auto Switch LTC VITC mode the decimal point to the right of minutes illuminates P...

Page 23: ... sen sample rate Speed Cal flashes when ever there is a mismatch between the cho sen sample rate and the actual output sample rate For example if the Clock Reference is set to LTC and being fed by LTC from an analog tape that is running somewhat off speed this indicator will flash quickly if too fast or slowly if too slow The Speed Calibra tion LED will be lit steadily only if the out put clock re...

Page 24: ...ect a 75 ohm terminator included with the USD to the unused loop through connector Video Reference Thru on the back panel or Ensure that another terminated video device is fed from the loop through con nector Connector Female BNC 4 Video Reference Thru A parallel unbuffered connection output for any video source connected to the Video Reference In port allows black burst or other video reference t...

Page 25: ... at this output MTC output can be regenerated while the USD is locked to any supported positional reference and clock reference or internally generated in Generate mode in which case MTC output follows generator run stop Intended to supply MTC from the USD to external sequencers or other MIDI devices Connector Female standard DIN 5 pin 9 LTC In Receives a Linear Time Code LTC source balanced or un...

Page 26: ...own as Slave Clock Connector Female BNC 18 Super Clock Out Outputs Super Clock 256x sample rate in formation for Digidesign Audio Interfaces for clock reference purposes only Can be generated internally or can be converted from an external clock reference Also known as Slave Clock Connector Female BNC 19 AC Power In Receives AC mains power 85 to 264 volts 47 to 63 Hz auto switching Connector IEC S...

Page 27: ...colon Odd even status is only available while reading VITC and only when VITC is within a speed range from zero to about 50 of playback speed 2 Clock Reference Selects the USD clock reference which in clude Video Video Reference Input Video Video Input Linear Time Code LTC Digital AES EBU Digital Super Clock Digital Word Clock Pilot Tone Bi Phase Tach Internal VSO 3 Sample Rate Selects the USD sam...

Page 28: ... nicate with the USD 7 LTC Output Level Adjusts the analog audio level of the USD LTC output from 24 dBu to 9 dBu 8 Freewheel Duration Sets the period of time for which the USD will continue to supply positional refer ence data after an external source is inter rupted or stopped Also referred to as Time Code Freewheel in Pro Tools 9 Video Format Indicates the format NTSC or PAL for both the incomi...

Page 29: ...ures These con trols are also available from within the Pro Tools Peripherals dialog Complete Window Dub instructions are provided in the section Generating a Win dow Burn on page 51 16 Bi Phase Tach Parameters Used for specialized applications that in volve film or other equipment that output Bi Phase Tach information These parame ters must be set to match the Bi Phase or tach source to achieve l...

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Page 31: ...USD USD Setup can optionally be used for access to specific features described throughout this chapter Pro Tools III Systems Pro Tools III and other systems without a DigiSerial Port connection can use Pro Tools and the front panel or USD Setup software Standalone Remote installations no connections to a computer will use the USD front panel switches and displays USD Standalone with Remote Control...

Page 32: ...on Setup all all Sample Rates all Session Setup all all Frame Rates all Session Setup all all LTC Output level no yes yes Freewheel duration yes Session Setup yes yes Video Format NTSC PAL no yes yes VITC Read Lines no yes yes VITC Generate Lines no yes yes VITC Insertion Enable no yes yes Pitch Memory no yes yes Window Dub all Peripherals Sync on off only yes all Bi Phase Tach no yes yes Gen Bi P...

Page 33: ... s Front Panel Controls The front panel provides access to all USD features except the following which can be controlled using Pro Tools or USD Setup Remote Only Mode Front Panel Lockout Firmware update Changing Window Burn Size Vertical Position Horizontal Position and Color GPI General Purpose Interface func tions Choosing between Video In or Video Ref In connector for the Clock Reference source...

Page 34: ...state of the USD you may see a readout other than SE7 GEn To scroll parameter choices Press Up or Down as needed to scroll through available parameters Holding the switch scrolls through the parameters To select a parameter to edit When the desired parameter is displayed press Set This will access that parameter s current setting To edit parameter values With parameter values displayed press Up or...

Page 35: ...gh available sample rates shown in the LED display See 4 Sample Rate LEDs on page 18 for more information about USD sample rates and displays 3 When the required rate is displayed press Set to confirm it as the current USD sample rate Sync Setup This section describes how to configure the USD for the specific requirements of your system or current project Instructions are organized by task and cov...

Page 36: ...the Video Ref In or the Video In connector for more details see Limitation When Using Front Panel Clock Reference Switch on page 32 For House Sync Black Burst Use the USD Video Ref Input For Incoming Video Use the Video In con nector Serial Time Code with MachineControl MachineControl equipped Pro Tools sys tems can utilize serial time code When us ing MachineControl with serial time code as the p...

Page 37: ...lock and Super Clock To resolve Pro Tools USD to external AES EBU Word Clock or Super Clock From Pro Tools Select the appropriate digital clock refer ence from the Clock Reference pop up in the Pro Tools Session Setup window Using the front panel controls 1 Press the front panel Clock Reference switch to select Digital as the clock refer ence 2 Press Set 3 Press Up or Down until Digital Reference ...

Page 38: ...s You should resolve the USD to Super Clock any time you are trans ferring digital audio from one Digidesign workstation to another For additional digital clock signal informa tion see Digital Clock Signal Types on page 69 LTC and Clock Reference LTC can provide both positional and clock information as part of the time code signal LTC cannot be read when the reference deck is stopped or playing ba...

Page 39: ... Clock Reference switch select Pilot Using USD Setup 1 Connect your Pilot Tone reference source to the USD s Bi Phase Tach GPI Pilot port 2 Select Pilot Tone under the USD Setup s Clock Ref pop up menu If the Pilot Tone reference source is not valid for any reason such as a poor con nection or other signal transmission prob lem the Locked LED on the far right of the USD front panel will flash on a...

Page 40: ...uare waves that the USD can use as its clock ref erence at nearly any speed including still paused The USD uses the phase relationship be tween the two square waves to determine the device s direction forward or reverse However this is relevant only when the USD is using the Bi Phase signal as a posi tional reference Tach A Tach signal is a variation of Bi Phase With Tach s two signals one is used...

Page 41: ...varispeed value using the on screen slider Using USD Setup 1 In the USD Setup s Variable Speed Over ride section check the VSO Enabled box An X indicates that varispeeding is en abled 2 Use the sliders to adjust the varispeed values in semitone or cent increments The actual output word clock frequency is shown near the sliders or 3 Enter the value in semitones and cents using the editable fields I...

Page 42: ...again until changed Positional References Positional Reference relates to the USD time code readers and generator and to the Bi Phase reader Whereas the clock connections and Clock Reference setting serve to keep your sys tem s components all operating at exactly the same rate over time the Positional Ref erence is the facility for working with a par ticular time address The Positional Reference s...

Page 43: ...k In any case LTC is deliv ered to USD as a series of audio pulses re gardless of how it is stored or generated LTC can function simultaneously as a posi tional reference and a clock reference To use LTC as the USD s positional reference From Pro Tools In the USD Setup area of the Session Setup window choose LTC from the Posi tional Ref pop Using the front panel controls Using the front panel Posi...

Page 44: ... video frames VITC is less prone to tape drop outs and in this sense is inherently more reliable than LTC VITC can be embedded into any video signal including digital video signals tape or nonlinear without requiring an extra audio track to carry time code Tape Protection Mode and VITC In order for VITC to be read when a video tape is paused the picture must remain vis ible However to save wear an...

Page 45: ... the best time code signal This is indicated on the front panel by the LTC and VITC positional reference LEDs both will be lit and by a decimal point between the minutes and seconds on the front panel time code dis play VITC cannot be read at high speeds shuttle speeds for example while LTC can and LTC cannot be read at slow speeds while VITC can be read at slow speeds and when parked Auto Switch ...

Page 46: ...a starting frame address and a specific pulses per frame value Each of these re lated settings are explained in the follow ing sections To use Bi Phase Tach for positional reference from Pro Tools Select Bi Phase from the Positional Refer ence menu located in the Session Setup window To use Bi Phase Tach for positional reference from the front panel Using the front panel Positional Refer ence swit...

Page 47: ...ered the proper start ing frame click Set Bi Phase Tach Signal To define the direction for a Bi Phase Tach input signal using the front panel 1 Using the Set Down and Up switches select Bi Phase Tach Input Signal bIPH 5I6 2 Press the Set switch The LED Time Code Display will switch to display one of the four parameter values A LEAd b Bi Phase FWD A leads B Here when the A square wave is ahead of t...

Page 48: ...h will advance the time ad dress one frame Each press of the Down switch will retard the time address by one frame Remember how many presses you ve accumulated so that you can go back and trim the starting address you pre viously programmed in Generating and Regenerating Time Code The USD generates LTC VITC and MTC si multaneously obtaining time addresses from a variety of sources When the Positio...

Page 49: ... time See Bi Phase Tach Start ing Frame on page 42 for more informa tion Generator Preset Mode In this mode the USD generates time code internally from a start time based upon the Generator Preset Time Using either USD Setup or the front panel controls you can start stop resume and reset time code generation When generating time code in Generator Preset Mode the USD time code generator is resolved...

Page 50: ...ously 5 Repeat until you have finished setting the USD to the desired generator start time When you are done press the Set switch again The USD will retain the setting even when the unit is powered off and on again until it is changed LTC Generation Regeneration Regenerating LTC The USD will regenerate LTC whenever the external positional reference is moving at normal 1x forward speed 10 Make sure...

Page 51: ... press and release the Run Stop Clear switch To generate LTC using USD Setup 1 In USD Setup s Positional Ref pop up menu select Generate 2 In USD Setup s Generator Bi Phase Preset window type in the desired time code start time in Hrs Min Sec Frm To reset click Zero 3 To begin generating click Run 4 When you have finished generating the desired length of LTC click Stop VITC Generation Regeneration...

Page 52: ...ional refer ence you ll need to select both a clock ref erence and a positional reference To regenerate VITC based on an external positional reference from the front panel 1 Connect the video source to the USD Video Ref connector and loop to the USD Video Input connector 2 Select VITC Insertion VI7C In5 using the Set Down and Up switches 3 Press the Set switch again The LED Time Code Display displ...

Page 53: ...ed based upon an up stream video reference you may encounter repeated or skipped VITC frames Be sure to check VITC Timing Rule on page 50 and VITC Video Source Rule on page 47 To generate VITC internally using the front panel controls 1 Ensure that the USD is connected in line with a video source and video destination 2 Select VITC Insertion VI7C In5 using the Set Down and Up switches For de taile...

Page 54: ...e code ad dresses will begin to increment 9 Click Stop when you want to pause or stop the generating process Regardless of whether you are generating or regenerating an active video signal will need to be present at one of the USD s video inputs If in doubt always check if the machine is paused stopped or unlaced VITC Timing Rule The following rule is in effect whenever you are generating or regen...

Page 55: ...on of VITC or Bi Phase either of which might be operating at slow or still speeds Thus you can still use a connected MIDI device for Auto Spotting from VITC or Bi Phase Optionally this constant output can be set to mute when time code LTC is idle To mute idle time MTC output from the front panel 1 Use the front panel Set Up and Down switches to display Idle MTC IdLE 7C 2 Press Set to display the c...

Page 56: ...ar ed iting system or other video device must be present at one of the USD s video input connectors Video In or Video Ref In When generating a window dub the two VITC Timing and VITC Video Source Rules apply USD Output The signal from the USD s Video Out connector must be routed to a video destination such as another VTR or nonlinear editing system To burn a window dub onto a video signal from Pro...

Page 57: ...indow Burn Display Options If you need to change the appearance of the window dub in terms of size vertical position horizontal position and color you ll need to use Pro Tools or USD Setup These parameters cannot be adjusted from the USD s front panel controls Size Sets the relative size of the window dub The choices are Small or Large The default setting is Large Vertical Position Sets the vertic...

Page 58: ...r 54 bers are displayed directly on top of the video signal without a contrasting back ground box The default setting is White on Black Bkgnd Default Window Burn settings are listed in Restoring Factory Settings on page 65 ...

Page 59: ...llowing table identifies each of these abbreviations To select USD front panel parameters 1 Press Set 2 Use the Up and Down switches to scroll through available parameters described below Detailed instructions for the multi func tion Generator Parameter switches can be found in the section Using the Front Panel Generator Parameter Switches on page 29 USD LED display of abbreviated parameter names ...

Page 60: ...Pull Up Down The USD Pull Up and Pull Down features are not designed to perform conversion be tween 24 fps and 25 fps VITC Insertion When selected VITC will be inserted onto the outgoing video signal assuming that a video signal is present at one of the USD video inputs and that the USD is in a valid mode for inserting VITC To configure the USD to insert VITC using the front panel 1 Select VITC In...

Page 61: ...6 15 17 16 18 17 19 18 20 19 21 20 22 3 Use the Down and Up switches to scroll through the parameter values 4 When you have chosen your desired op tion press Set VITC Generate Lines This setting determines the line pair of the video signal at the Video Out connector onto which the USD inserts VITC Nor mally this should be left at the default set ting of 14 16 To choose the VITC generate lines 1 Se...

Page 62: ...Default Window Dub Settings The USD time code character generator de faults to the following display settings Freewheel Length Duration Freewheel Length sets the period of time for which the USD will continue to regen erate time code when incoming time code is interrupted See Freewheel Duration on page 39 for an explanation of this feature The follow ing describes the choices list in the front pan...

Page 63: ...l when resolving USD to off speed free running LTC When Pitch Memory is enabled the USD will re main at a pitch sample rate that corre sponds to the last known clock reference speed Without Pitch Memory Hold USD reverts to the selected sample rate Turn off Pitch Memory if you want to digitally transfer to another device and to ensure the receiving device gets the correct sample rate Also turn pitc...

Page 64: ...showing time code numbers The USD will retain the setting even when the unit is powered off and on again until it is changed Bi Phase Tach Input Signal This selection is also used for specialized applications that involve film or other equipment that output Bi Phase Tach in formation Here the parameter values will be used to define the direction of the Bi Phase Tach signal For complete instruction...

Page 65: ...Clock Refer ence the resolver sample clock master ref erence and use the other input for working with VITC time code and the character generator window dub Don t worry if you have just a single video source The USD provides a very simple method for connecting your single video source to both of the video inputs See Us ing Video Inputs with VITC and the Char acter Generator on page 62 In a typical ...

Page 66: ...e is one of the two video inputs and the Positional Reference is Generate then VITC and character gen erator functions are applied to the video ar riving at the Video Ref input connector This helps you avoid re patching video ca bles whenever you want to stripe a video tape with your reference black burst or color bars along with internally generated time addresses for VITC and or LTC and or CG du...

Page 67: ...n the Mix win dow top to bottom in the Edit window Example Fader Start Application In a typical scenario the Fader Start feature controls playback of a CD player The CD player outputs are routed into a Pro Tools stereo Aux Input As the Aux channel fader is moved above 120 dB playback of the CD player is automatically triggered Like wise as the fader is moved below 120 dB playback is automatically ...

Page 68: ...stal To put this in perspective most digital audio products are accurate to within 20 to 50 ppm and drift with temperature The USD s accuracy is possible because it con tains a low jitter high stability tempera ture controlled crystal oscillator Warm Up USD Before Recalibrating Before you begin the calibration procedure power on the USD and allow it to warm up for at least five minutes The tempera...

Page 69: ...ings See USD Defaults on page 65 for default values To reset all parameters to default settings 1 Switch off power to the USD and wait at least 10 seconds 2 Hold down the Up and Down front panel switches and switch on power to the USD do not release the Up and Down switches until the display reads FAC CFG Resetting factory settings does not reset the USD oscillator See Calibrating the USD Oscillat...

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Page 71: ...ronization capability including con sumer grade VCR or some entry level PC based editing systems Simple Setups In a modest setting with one or two VTRs Pro Tools and the USD using the video signal as the clock reference is of ten satisfactory In these situations proper sync can be achieved using the video signal as clock reference Why VITC is Unavailable for Clock Reference VITC itself does not pr...

Page 72: ...deo black burst generator Auto Switch LTC VITC Auto Switch LTC VITC lets USD automati cally select between these two time code sources LTC and VITC both provide useful and unique capabilities For instance it is im possible to read LTC off a paused video tape Consequently using only LTC there s no way you can use Pro Tools to perform Auto Spotting of regions when the tape is paused However VITC con...

Page 73: ...cable controls the play and record speed Using just Word Clock it is possible to cre ate a chain of digital devices in your stu dio by picking one source as the Word Clock master and configuring other sources as Word Clock slaves AES EBU Some professional digital audio products use AES EBU null clock which is an AES EBU data stream that contains only clock information only and no audio infor matio...

Page 74: ... slightly different As you may recall Tach also uses two signals The A signal is a square wave that provides clock informa tion the B signal is in a steady state high or low that indicates the direction Unfor tunately not all Tach generating equip ment uses the B signal in the same way Fortunately the USD s Input Signals op tions allows you to choose the appropriate method Tach Fwd B is Low or Tac...

Page 75: ... Tone as a kind of in expensive and readily available house sync for location production Increas ingly it s being replaced by time code since new generation film cameras as well as many portable DAT recorders are time code capable Please note that Pilot Tone contains no po sitional information it is simply a clock reference Most 1 4 inch machines have a center track for time code or pilot ...

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Page 77: ...56 Hz Pull Down 44100 Hz 44144 Hz Pull Up 47952 Hz Pull Down 48000 Hz 48048 Hz Pull Up Frame Rates 30 fps frames per sec ond 30 fps drop frame 29 97 fps 29 97 fps drop frame 25 fps 24 fps Variable Speed Override 699 cents 58 25 Limited to absolute sample rate limits of 35 0 kHz and 50 0 kHz ...

Page 78: ...Hz 1 3 sec 50 Hz Frequency Reference Stability 5 ppm from 50 to 131 degrees F 10 to 55 degrees C Aging 2 ppm year typical Burn in Window Position 5 horizontal and vertical positions Size Large and small text Color Black or white text on white or black background or keyed Dimensions Height 1RU 1 75 4 45 cm Width 19 0 48 26 cm Depth 10 5 26 67 cm Weight 5 0 lbs 2 27 kg General ...

Page 79: ...e Temperature 40 to 176 degrees F 40 to 80 degrees C Relative Humidity 0 to 95 non condensing Power Requirements Voltage 85 to 264 VAC Frequency 47 to 63 Hz autoswitching Wattage 9 5 W typical 30 W maximum Connector 3 pin AC and ground IEC 950 320 3 2 4 Agency Compliance Meets FCC Part 15 Class A limits CE EN 55022A CE EN 60950 CE EN 55082 1 UL 1419 and CSA 22 2 General ...

Page 80: ...2 hot Impedance 200K ohms LTC Out Format SMPTE EBU 80 bit longitudinal drop frame non drop frame Connector 3 pin XLR male per IEC 268 12 Speed Range 10 of play speed Level 24 dBu thru 9 dBu RMS differential pin 2 hot Level Default 0 dBu RMS 1 52V p p 10mV Output Impedance 5K ohms Load Impedance min 600 ohms Rise Fall Time 42us 1us measured between 10 and 90 p p S N Ratio 60 dB RMS at 0 dBu level V...

Page 81: ...ation 100K ohms Description Passive loop thru of Video Ref in AES Clock In Level 5 V p p at 110 ohms pin 2 hot Connector 3 pin XLR female per IEC 268 12 AES Clock Out Level 5 V p p at 110 ohms pin 2 hot Connector 3 pin XLR male per IEC 268 12 Word Clock In Level 0 to 5 V low 2 0 to 6 0 V high Connector BNC Female Word Clock Out Level TTL 3 3 V typical Rear Panel Connectors Connector Specifications...

Page 82: ...ubminiature female DB25 GPI Pilot Bi phase Tach In Frequency Range 0 to 76 8 KHz Level 4 5 to 5 5 V opto isolated Current 10 mA max Polarity bi phase Both inputs are software programmable Polarity tach Direction polarity is software programmable Modulo Range 2 thru 254 Pilot In Level 100 mV to 5 5 V p p differential Frequency Range 50 60 Hz nominal Impedance 200K ohms Rear Panel Connectors Connect...

Page 83: ...ical Current 15 mA Frequency Frame rate max Latency Half frame max GPI Relay Description Four pairs of SPST contacts normally open Load while switching 5 A max at 200 VDC Load continuous 1 5 A max at 200 VDC Operate Release Time 1 ms Repetition Rate Frame rate max Latency Half frame max MIDI Time Code MTC Out Current Rating 15 mA current loop Rate 31 25 Kbaud Connector 5 pin DIN female Rear Panel ...

Page 84: ...eters max PC Serial Format PC compatible RS 232 serial port Connector 25 pin D subminiature female DB25 Cable Length 50 feet 15 meters max VITC In Format SMPTE 90 bit drop frame non drop frame Line Range 10 to 40 all line mode 10 to 22 single line mode VITC Out Format SMPTE 90 bit drop frame non drop frame Line Range Two lines 10 to 20 Rear Panel Connectors Connector Specifications ...

Page 85: ... In or LTC Out connectors Pin 1 and ground should be connected at the input only not at the output This will prevent ground loops between the shield and the Pin 1 conductor If you are connecting an unbalanced signal to the USD s LTC In or LTC Out connectors Connect only Pin 2 to the signal Connect both Pins 1 and 3 to ground at all inputs and outputs Refer to the following illustration for the cor...

Page 86: ...Universal Slave Driver 82 BiPhase GPI Pilot Bi phase Tach Inputs Bi Phase GPI Pilot Bi phase Tach ...

Page 87: ...Appendix C Wiring Diagrams Pin Assignments 83 GPI Relay Outputs GPI TTL MTC Outputs GPI Relay Output GPI TTL MTC Output ...

Page 88: ...Universal Slave Driver 84 GPI opto Inputs TPI opto Input ...

Page 89: ...ction Pin 2 HSKiB 2 RTS_IN Request To Send input to USD Pin 1 HSKoB 3 RX_OUT Transmitted data output from USD Pin 5 input RXDB 4 GND Chassis ground Ground 5 TX_IN Received data input to USD Pin 3 output TXDB 6 GND Chassis ground Pin 8 input RXDB 7 CTS_OUT Clear To Send output from USD Pin 7 input GPiB 8 NC No connection Pin 6 TXDB Shell GND Chassis ground Ground ...

Page 90: ...PI Pilot Port Accessory Port Pin Name Description 1 GPOUT0 GPI TTL level output 0 2 GPOUT1 GPI TTL level output 1 3 GPOUT0_A GPI Relay 0 contact A 4 GPOUT0_B GPI Relay 0 contact B 5 GPOUT1_A GPI Relay 1 contact A 6 GPOUT1_B GPI Relay 1 contact B 7 GPOUT2_A GPI Relay 2 contact A 8 GPOUT2_B GPI Relay 2 contact B 9 GPOUT3_A GPI Relay 3 contact A 10 GPOUT3_B GPI Relay 3 contact B 11 OPTRETURN Return f...

Page 91: ...erature and current The typical time to trip at 1 5 A is 5 minutes Time to trip at 8 A is 5 seconds After tripping the fuse will return to its low resistance state when the current is reduced sufficiently 15 PILOT_IN Pilot tone input negative 16 PILOT_IN Pilot tone input positive 17 RET0 Return from GPI opto isolator 0 18 GPIN0 Input to GPI opto isolator 0 19 RET1 Return from GPI opto isolator 1 2...

Page 92: ...rmation 0 relay Play 1 relay Record Ready 2 relay fader start 1 3 relay fader start 2 4 TTL Stop 5 TTL Record Logical GPI numbers 0 through 3 are asso ciated with GPI relay outputs 0 through 3 pins 3 through 10 GPI numbers 4 and 5 are associated with GPI TTL outputs 0 and 1 pins 1 and 2 GPI TTL WIring The circuit can drive approximately 2 mA through a load of 1 6K and maintain a logic high level o...

Page 93: ...ical signal information 70 black burst 11 house sync 20 BNC 34 back panel 20 terminator for Video Ref Thru 20 C character generation see Window Dub clock reference and resolving 32 choosing digital source 33 front panel LEDs 17 front panel switch 17 selecting a clock source 32 USD Setup 23 Color for window dub 53 Connected to USD 24 D DASH 34 DAT signals 69 DB 25 20 DF LED 19 DigiSerial Port 2 8 d...

Page 94: ...onnecting 11 I Idle MTC Enabled front panel 51 in USD Setup 51 installation USD and a CPU 7 internal clock 36 K kHz sample rates 18 L LED Time Code Display 18 LEDs 17 18 Locked 19 LED and troubleshooting 19 LTC 11 and clock reference 34 generation regeneration 46 In back panel 21 Out back panel 21 output level USD Setup 24 output level gain front panel 59 positional reference 39 wiring diagrams 81...

Page 95: ...29 Remote Only Mode 29 Resolver Locked 24 RUN STOP CLEAR 30 S sample rate and Speed Cal status display 19 choosing front panel 31 front panel sample frequency 56 front panel LED displays 18 SECAM 24 use PAL 60 serial port for Macintosh 21 for Windows 20 serial time code and clock reference 32 special clock information 32 using for positional reference 42 Set Generator Start Time 46 Slave Clock see...

Page 96: ...ng 11 specifying over Video In 32 Video Ref Thru and terminator for 20 back panel connector 20 connecting 11 VITC as positional reference 48 connector for positional reference 21 default line pair 48 Generate Lines USD Setup 24 Generate Lines front panel details 57 Insertion Enabled USD Setup 24 Insertion front panel details 56 monotonic 50 positional reference 40 Read Lines USD Setup 24 Read Line...

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Summary of Contents for Digidesign USD

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Avid Technology Digidesign USD, User Manual, Page: 31 / 96

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Summary of Contents for Digidesign USD

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