Avid Technology Digidesign USD User Manual
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Avid Technology Digidesign USD User Manual

Avid Technology Digidesign USD User Manual

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Universal Slave Driver
User's Guide
Version 5.0.1
Digidesign Inc.
3401-A Hillview Avenue
Palo Alto, CA 94304 USA
tel: 650·842·7900
fax: 650·842·7999
Technical Support (USA)
Product Information (USA)
Fax on Demand (USA)
1-888-USE-DIGI (873-3444)
www.digidesign.com
Digidesign FTP Site
ftp.digidesign.com
650·842·6699
650·856·4275
650·842·6602
800·333·2137
World Wide Web

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  • Page 1 Universal Slave Driver User’s Guide Version 5.0.1 Digidesign Inc. 3401-A Hillview Avenue Palo Alto, CA 94304 USA tel: 650·842·7900 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...
  • Page 2 Copyright This User’s Guide is copyrighted ©2000 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.

  • Page 3: Table Of Contents

    contents Chapter 1. Introduction ............1 System Requirements .
  • Page 4 Chapter 4. Using the USD ........... 27 Control Options .

  • Page 5: Chapter 1. Introduction

    chapter 1 Introduction The Universal Slave Driver (USD) is a mul- System Requirements tipurpose synchronization device. It sup- ports all major time code and clock refer- Macintosh Pro Tools Systems ence standards used in audio, video, film, and multimedia production. •...
  • Page 6 USD Setup Macintosh and Windows USD Serial Port Requirements USD Setup provides standalone software Pro Tools MIX/MIXplus and Pro Tools 24 control of the USD, and firmware updating Systems capabilities. USD Setup can be used with or The USD must be connected to the DigiS- without Pro Tools for complete control of erial Port on the Digidesign MIX or d24 all USD features.

  • Page 7: Compatibility Information

    USD Cables USD Setup USD Setup requires its own connection USD Serial Cable •A USD Serial cable is in- from the USD to your computer for remote cluded to connect the USD to a Macin- control of the USD: tosh- or Windows-based Pro Tools DigiSerial Port (Pro Tools MIX, MIXplus, Macintosh A serial port (modem or printer, or Pro Tools 24 systems).

  • Page 8: About This Guide

    The following symbols are used to high- About This Guide light important information: This guide assumes you understand the ba- User Tips are helpful hints for getting the sics of synchronization and time code, most from your system. know how to operate devices that send or receive time code such as a video tape re- Important Notices include information that corder, and how to connect your studio.
  • Page 9 Output and Generation • Digidesign Super Clock (256x sample clock) • Word Clock (1x sample clock); • AES/EBU null clock (AES “digital black”) • VITC (if a video input is present) • LTC • MIDI Time Code (MTC) Other Features •...
  • Page 10 Universal Slave Driver...

  • Page 11: Chapter 2. Installing The Usd

    chapter 2 Installing the USD For USD with Pro Tools, installation in- intosh serial port or Windows COM port. cludes the following steps: Firmware updating is explained in “Updat- ing USD Firmware” on page 14. • Connect the USD to your Pro Tools sys- In addition, USD Setup can be used for soft- •...
  • Page 12 Pro Tools MIX/MIXplus or USB Blue and White G3/G4 Example Pro Tools 24 Systems Connect the USD Mac Serial port to the DigiSerial port. (Macintosh and Windows) Connect MachineControl™ (optional) to a GeeThree, Griffin, or Keyspan serial To connect the USD to a Macintosh or port adaptor (see “USD Serial Port Require- Windows Pro Tools MIX/MIXplus or ments”...
  • Page 13 Install USD Setup (see “Software Installa- Rules for Using the DigiSerial Port for USD in Expanded Pro Tools Systems tion” on page 13). The active DigiSerial Port will be on the Digidesign MIX or d24 card connected to USD Setup the primary Pro Tools audio interface.

  • Page 14: Connecting Usd To Pro Tools

    If using more than one interface, connect Standalone Mode the Slave Clock output of your primary in- In standalone mode (when USD is not con- terface to the Slave Clock input of the sec- nected to Pro Tools), no computer or serial ond interface, and so on for each connection is required except for additional Interface (but do not loop Slave...

  • Page 15: Connecting Machines, Decks, And Other Devices

    Connecting LTC Connecting Machines, The USD provides LTC input and output Decks, and Other Devices connectors. The following sections describe connec- To Input LTC to the USD: tions required for different applications. Connect the LTC signal from your ma- chine, synchronizer or other source to the Connecting a Video Source USD LTC In port.
  • Page 16 Keep in mind that Word Clock contains no OMS, Pro Tools, and the USD positional information; if you want devices When a CPU is connected to the USD Mac to play or record in sync, you’ll still need to Serial port, Pro Tools does not need any ad- provide them with a positional reference.

  • Page 17: Software Installation

    Optionally, USD Setup can be installed to Additional MIDI Requirements provide access to the complete set of USD Macintosh-based systems using Pro Tools parameters, and for remote control of USD version 4.1 or earlier will also need to de- independent of Pro Tools. fine an OMS device for the USD so that it can provide MTC to other OMS-compatible devices.

  • Page 18: Updating Usd Firmware

    Software Configuration for Software Configuration for Pro Tools and USD USD Setup Pro Tools provides USD initialization, con- To configure USD Setup: figuration and firmware update controls. Make sure the USD is connected to your computer according to the instructions in To configure USD for Pro Tools MIX, MIXplus “Connecting USD to a Computer”...

  • Page 19: Configuring Oms

    To display the current USD firmware version To update USD firmware using USD Setup: using the front panel: Make sure the USD is connected to the Current firmware version is shown dur- computer as explained in “USD Setup” on ing power up in the time code LED display. page 9.

  • Page 20: Troubleshooting

    OMS settings for the USD: Troubleshooting Create a new device for the USD. Enable both Receives and Sends MIDI This section describes common synchroni- Time Code. zation problems and some possible solu- tions. Deselect Receives/Sends MIDI Beat Clock, and Receive/Sends MIDI Machine Status LEDs Control.

  • Page 21: Chapter 3. Usd Hardware And Software Overview

    chapter 3 USD Hardware and Software Overview USD Front Panel POSITIONAL REFERENCE CLOCK REFERENCE FRAME RATE 44.1 kHz VIDEO 48 kHz PULL UP VITC 29.97 PULL DOWN LOCKED DIGITAL BI-PHASE SPEED CAL PILOT REMOTE MODE GENERATE BI-PHASE/TACH RUN/STOP INTERNAL/VSO DOWN UNIVERSAL SLAVE DRIVER CLEAR 9 10...
  • Page 22 4. Sample Rate LEDs 6. LED Time Code Display Green LEDs show the current USD sample This 7-segment, multifunction LED is the rate. USD time code and parameter display. Time Code The current positional refer- The table below shows how the four Sam- ple Rate LEDs indicate the current USD ence (internal or external), is displayed in sample rate.
  • Page 23 ever there is a mismatch between the cho- 8. Positional Reference LEDs sen sample rate and the actual output Yellow LEDs display the active positional sample rate. reference. For example, if the Clock Reference is set to In Auto Switch LTC/VITC mode, both the LTC, and being fed by LTC from an analog LTC and VITC LEDs light while the USD tape that is running somewhat off-speed,...

  • Page 24: Usd Rear Panel

    USD Rear Panel INTERNALLY 85-264VAC, 47-63HZ, 115 W TERMINATED BI-PHASE / TACH / GPI / PILOT 9-PIN IN / ACC PC SERIAL VIDEO REF MAC SERIAL VIDEO MTC OUT WORD CLOCK SUPER CLOCK (256X) 9-PIN OUT 6 7 8 13 14 15 16 17 18 Figure 2.
  • Page 25 generated in Generate mode, in which case 5. Mac Serial Port MTC output follows generator run/stop. A bidirectional (in/out) port designed for Intended to supply MTC from the USD to use exclusively with the DigiSerial Port external sequencers or other MIDI devices. found on all Pro Tools MIX and d24 cards, or to a modem/printer port on a compati- Connector: Female standard, DIN 5-pin...

  • Page 26: Usd Setup Software

    12. AES/EBU Out 18. Super Clock Out Outputs a silent (all bits OFF) AES/EBU au- Outputs Super Clock (256x sample rate) in- dio signal whose sample rate exactly formation for Digidesign Audio Interfaces, matches the USD Word Clock BNC output. for clock reference purposes only.
  • Page 27 Overview of USD Setup 2. Clock Reference Controls Selects the USD clock reference, which in- clude: The following section identifies each con- Video (Video Reference Input) trol of USD Setup. Details on configuring Video (Video Input) parameters can be found in Linear Time Code (LTC), Chapter 4: Using the USD.
  • Page 28 6. Status 8. Freewheel Duration Shows the current state of USD Setup soft- Sets the period of time for which the USD ware in relation to the USD and external will continue to supply positional refer- devices. ence data after an external source is inter- rupted or stopped.
  • Page 29 inserting VITC. The only invalid positional 16. Bi-Phase/Tach Parameters reference modes are VITC or Auto Switch Used for specialized applications that in- LTC/VITC. The USD can’t read VITC and volve film or other equipment that output generate new VITC at the same time. Bi-Phase/Tach information.
  • Page 30 Universal Slave Driver...

  • Page 31: Chapter 4. Using The Usd

    chapter 4 Using the USD Standalone Control Options Remote installations (no connections to a The USD can be controlled in three ways: computer) will use the USD front panel switches and displays. • from within Pro Tools • using the front panel controls USD Standalone with Remote Control •...

  • Page 32: Usd Controls In Pro Tools, Usd Setup, And Front Panel

    USD Controls in Pro Tools, USD Setup, and Front Panel USD Controls in Pro Tools, USD Setup, and the Front Panel Available from/in: Parameters Pro Tools Front Panel USD Setup Firmware Update yes (Peripherals/Sync) Clock References all (Session Setup) all, except Video In versus Video Ref in Positional References all (Session Setup)
  • Page 33 • Changing Window Burn Size, Vertical About Remote-Only Mode Position, Horizontal Position, and Color (USD Setup Only) • GPI (General Purpose Interface) func- tions When the default Remote-Only Mode • Choosing between Video In or Video Ref (Front Panel Lockout) is enabled in the In connector for the Clock Reference USD Setup Preferences window, none of source...
  • Page 34 When a parameter name is visible Pushing Depending upon the last state of the USD, the Down and Up switches scrolls through you may see a readout other than SE7 GEn. the parameter names (for example, from To scroll parameter choices: SET GEn to VIdEo SY).

  • Page 35: Sync Setup

    Press the Down or Up switches until the When the required rate is displayed, LED Time Code Display shows LTC Gain press Set to confirm it as the current USD (L7C 6AIn). sample rate. Press the Set switch again. The LED Time Code Display will now show the current parameter value for LTC Gain in dBu val- Sync Setup...

  • Page 36: Clock References

    Clock Reference Options Clock References The following sections provide specialized When used with an external clock refer- instructions for each clock reference ence, the USD functions as a resolver—so choice. that Pro Tools and other devices can be synchronized, or resolved, to a common Video Clock Options clock source.
  • Page 37 If you have only a single video source, and Using the front panel controls since USD uses different video inputs de- Press the front panel Clock Reference pending on configuration, you may want switch to select Digital as the clock refer- to follow the wiring tip below to ensure ence.
  • Page 38 Word Clock (1x) Word Clock is a digital LTC and Clock Reference clock reference signal that runs at 1x sam- LTC can provide both positional and clock ple rate, which is the same rate as the clock information as part of the time code signal. signal carried within an AES/EBU or S/PDIF LTC cannot be read when the reference data stream.
  • Page 39 If the Pilot Tone reference source is not Pilot Tone valid for any reason (such as a poor con- The USD can resolve to an external Pilot nection or other signal transmission prob- Tone signal for clock reference, for syn- lem), the Locked LED on the far-right of chronizing to (or transferring audio from) the USD front panel will flash on and off.
  • Page 40 The USD uses the phase relationship be- Using the front panel controls: tween the two square waves to determine Using the front panel Clock Reference the device’s direction (forward or reverse). switch, select BI PHASE/TACH. However, this is relevant only when the Select the appropriate Pulse Per Frame USD is using the Bi-Phase signal as a posi- and Input Signals parameters, as described...
  • Page 41 To resolve the USD to its internal clock: Using USD Setup In the USD Setup’s Variable Speed Over- From Pro Tools ride section, check the VSO Enabled box. In the USD Setup area of Pro Tools Ses- An “X” indicates that varispeeding is en- sion Setup window, select Internal from the abled.

  • Page 42: Positional References

    analog recordings so as to have the record- Positional References ing made at the true nominal sample rate (for example, exactly 44.1 kHz.) Positional Reference relates to the USD If Pitch Memory is disabled and the se- time code readers and generator, and to the Bi-Phase reader.
  • Page 43 To select a positional reference using the To use LTC as the USD’s positional reference: front panel: From Pro Tools: Press the Clock Reference switch to cycle In the USD Setup area of the Session the USD through its available clock refer- Setup window, choose LTC from the Posi- ences.
  • Page 44 VITC is less prone to tape drop outs, and in To set freewheel duration from Pro Tools: this sense, is inherently more reliable than Choose Display > Session Setup. LTC. VITC can be embedded into any In the Time Code Freewheel section, en- video signal, including digital video signals ter a number of frames for time code free- (tape or nonlinear), without requiring an...
  • Page 45 VITC cannot be read at high speeds (shuttle To use VITC as the USD positional reference using the front panel: speeds, for example) while LTC can, and LTC cannot be read at slow speeds (while Use the front panel Positional Reference VITC can be read at slow speeds, and when switch to select VITC.
  • Page 46 • Make sure to have or stripe matching To use Bi-Phase/Tach for positional reference, from Pro Tools: code on both your LTC and VITC tracks (and your on-screen video window burn, Select Bi-Phase from the Positional Refer- if any). ence menu, located in the Session Setup window.
  • Page 47 To set the starting frame for Bi-Phase/Tach Bi-Phase/Tach Signal from the front panel: To define the direction for a Bi-Phase/Tach Select Set Gen (SE7 6En), using the Set, input signal using the front panel: Down, and Up switches. Using the Set, Down, and Up switches, Press the Set switch again to display time select Bi-Phase/Tach Input Signal (bIPH code numbers;...

  • Page 48: Generating And Regenerating Time Code

    Bi-Phase/Tach Pulses-per-frame (PPF) Generating and There are several different standards for the Regenerating Time Code number of pulses-per-frame output by Bi- Phase or Tach devices. Using USD Setup’s The USD generates LTC, VITC, and MTC si- Pulse Per Frame setting, you can set the multaneously, obtaining time addresses USD to operate from 2 to 254 pulses per from a variety of sources:...
  • Page 49 Requirements for Read/Regeneration of LTC, Generator Preset Mode VITC and MTC In this mode, the USD generates time code LTC The external positional reference must internally from a start time based upon the be moving at normal, 1x forward speed Generator Preset Time.
  • Page 50 When you are done, press the Set switch Pro Tools Systems again. The USD will retain the setting, even Pro Tools provides controls for virtually all when the unit is powered off and on again, USD generator controls. Instructions for until it is changed.
  • Page 51 Generating LTC To generate LTC using USD Setup: In USD Setup’s Positional Ref pop-up In Generator Preset mode, the USD can menu, select Generate. generate LTC using either an external or in- ternal clock reference. This allows the USD In USD Setup’s Generator/Bi-Phase Preset to function as a complete standalone time window, type in the desired time code start code generator.
  • Page 52 stream. Thus, VITC is never inserted when To regenerate VITC based on an external positional reference from the front panel: the Positional Reference is set to VITC or Auto Switch LTC/VITC. Connect the video source to the USD Video Ref connector and loop to the USD Example Video Input Configuration Video Input connector.
  • Page 53 To regenerate VITC based on an external To generate VITC internally using the front positional reference using USD Setup: panel controls: Ensure that the USD is connected in-line Ensure that the USD is connected in-line with a video source and video destination. with a video source and video destination.
  • Page 54 To pause or stop VITC from the front panel: Regardless of whether you are generating or Press and release the Run/Stop/Clear regenerating, an active video signal will need switch when you want to pause or stop the to be present at one of the USD’s video inputs. generating process.

  • Page 55: Generating A Window Burn

    Press Up or Down to toggle Idle MTC to MTC Generation/Regeneration the Off setting. MTC (MIDI Time Code) is a serial digital Press Set again to exit and return USD to signal. In many ways, you can think of it as its previous state.
  • Page 56 A window dub can be very helpful for any- To burn a window dub onto a video signal from Pro Tools: one involved in audio-for-picture, since it gives you an instant, visual cue as to where Choose Setups > Peripherals and display you are in time.
  • Page 57 Ensure that all the proper video connec- Window Burn Display Options tions have been made, and that you’ve se- If you need to change the appearance of lected the correct positional reference. the window dub—in terms of size, vertical After you have completed these steps, position, horizontal position, and color—...
  • Page 58 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. Universal Slave Driver...

  • Page 59: Chapter 5. Additional Operational Information

    chapter 5 Additional Operational Information Detailed instructions for the multi-func- Front Panel tion Generator/Parameter switches can be Generator/Parameter found in the section “Using the Front Panel Generator/Parameter Switches” on Controls page 29. This section details the parameter features USD LED display of abbreviated parameter names available from the multi-function SET, UP, USD LED Parameter...
  • Page 60 The table below shows USD Sample Rate Set Generator Start Time indication with the four Sample Rate LEDs: See the section “Generator Start Time” on USD LED displays and Sample Rates page 46 for configuration instructions. USD LEDs ON Sample Rate 44.1 kHz 44.100 kHz 48 kHz...
  • Page 61 Use the Down and Up switches to switch When you have chosen your desired op- between the parameter values. tion, press Set. When you have chosen your desired op- VITC Generate Lines tion, press Set. This setting determines the line pair of the You may also need to select the line pairs video signal at the Video Out connector that you will generate VITC on, using the...
  • Page 62 Window Dub/Burn Freewheel Length/Duration By enabling this setting, you can superim- Freewheel Length sets the period of time pose a window dub onto an incoming for which the USD will continue to regen- video signal. erate time code when incoming time code is interrupted.
  • Page 63 LTC Output Level/Gain Pitch Memory/Hold Adjusts the audio level of the USD’s LTC Pitch Memory is useful when resolving output, from –24 dBu to +9 dBu. 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.
  • Page 64 formation. Here, the parameter values will Bi-Phase/Tach Pulses Per Frame be used to define the direction of the Bi- This selection is used for specialized appli- Phase/Tach signal. cations that involve film or other equip- ment that output Bi-Phase/Tach informa- tion.

  • Page 65: Managing And Selecting Video Inputs

    Use the Down and Up switches to switch Managing and Selecting between the parameter values. Video Inputs When you have chosen your desired op- tion, press Set. The USD has two independent video in- puts, referred to as “Video In” and “Video The LED Time Code Display will return to Ref”...
  • Page 66 front panel Clock Reference switch to se- The rule defining which video input is used lect VIDEO as the Clock Reference, it's re- for VITC and character generator functions ferring to the Video Ref connector, and is simple, and is explained in the following never to the Video In connector.

  • Page 67: Using Fader Start

    The clock reference (labelled Sample Clock Example Fader Start Application Resolver Circuit in Figure 3 on page 62) is In a typical scenario, the Fader Start feature selectable at all times. You can decide controls playback of a CD player. The CD which input signal to use to generate the player outputs are routed into a Pro Tools digital clock signal.

  • Page 68: Calibrating The Usd Oscillator

    USD’s accuracy is possible because it con- Calibrating the USD tains a low-jitter, high-stability tempera- Oscillator ture controlled crystal oscillator. The USD provides a feature for calibrating Warm Up USD Before Recalibrating the frequency of the on-board crystal oscil- Before you begin the calibration procedure, lator.

  • Page 69: Restoring Factory Settings

    Use the Down and Up switches to scroll USD Defaults through the parameter values. Pressing and Parameter Name Default releasing the switches will change the 00:00:00:00 Set Generator Start Time value by just one incremental value. Press- ing and holding the switches will scroll at a AES-EBU Digital Reference faster speed.
  • Page 70 Universal Slave Driver...

  • Page 71: Appendix A. Additional Synchronization Information

    appendix a Additional Synchronization Information Simple Setups In a modest setting with one Video and VITC Signals or two VTRs, Pro Tools and the USD, using the video signal as the clock reference is of- Black Burst and House Sync ten satisfactory.
  • Page 72 If you plan to use LTC as a Clock Reference Auto-Switch LTC/VITC (whether or not you are also using it as a Positional Reference), you will need to en- Auto-Switch LTC/VITC lets USD automati- sure that your LTC is recorded at as high a cally select between these two (time code) level as possible without distortion, and sources.
  • Page 73 If a dropout occurs, the USD waits until the Using just Word Clock, it is possible to cre- freewheel duration has expired before at- ate a “chain” of digital devices in your stu- tempting to switch over to the opposite dio by picking one source as the Word source.
  • Page 74 clock from USD. Pro Tools audio interfaces Calculating the direction of a Tach signal is must always be connected to this separate slightly different. As you may recall, Tach Super Clock signal chain. also uses two signals. The “A” signal is a square wave that provides clock informa- tion;...
  • Page 75 is then used to clock-reference the ATR. The result is that both the camera and the ATR will run at the same speed. You can think of Pilot 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...
  • Page 76 Universal Slave Driver...

  • Page 77: Appendix B. Technical Specs

    appendix b Technical Specs General Nominal Sample Rates 44056 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...
  • Page 78 General Resolver Lock Time LTC: 750 msec Video: 1.5 sec Word Clock: 750 msec Super Clock: 1.5 s (1.0 s typical) AES/EBU: 750 msec Bi-phase: 1.0 sec Pilot: 1.1 sec (60 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...
  • Page 79 General Vibration Resistance 5 mm displacement, 10 to 55 Hz, each axis Shock 5 G max Operating Temperature 32 to 131 degrees F (0 to 55 degrees C) Storage Temperature -40 to 176 degrees F (-40 to 80 degrees C) Relative Humidity 0 to 95%, non-condensing Power Requirements...
  • Page 80 Rear Panel Connectors Connector Specifications LTC In Format: SMPTE/EBU 80-bit longitudinal, drop frame/non- drop frame Connector: 3-pin XLR female per IEC 268-12 Speed Range: 1/30 to 80X play speed, forward or backward Level: -24 dBu to +9 dBu, differential (pin 2 hot) Impedance: 200K ohms LTC Out...
  • Page 81 Rear Panel Connectors Connector Specifications Video (Main) Out Level: 1V p-p Source Impedance: 75 ohms Video (Ref) In Format: NTSC or PAL composite video Level: 1V p-p Termination: 100K ohms Video (Ref) Out Level: 1V p-p Termination: 100K ohms Description: Passive loop-thru of Video Ref in AES Clock In Level:...
  • Page 82 Rear Panel Connectors Connector Specifications Connector: BNC Female Super Clock In Level: 0 to .5 V (low), 2.0 to 6.0 V (high) Connector: BNC Female Super Clock Out Level: TTL (3.3 V typical) Connector: BNC Female Bi-phase/Tach/ Connector: 25-pin D-subminiature female (DB25) GPI/Pilot Bi-phase/Tach In Frequency Range:...
  • Page 83 Rear Panel Connectors Connector Specifications GPI In Description: Four opto-isolator inputs/returns Level: 4.5 to 5.5 V Current: 10 mA max Frequency: Frame-rate max Latency: Half frame max GPI Out (TTL) Description: Two TTL-level outputs Level: TTL (3.3 V typical) Current: 15 mA Frequency: Frame-rate max...
  • Page 84 Rear Panel Connectors Connector Specifications Cable Length: 50 feet (15 meters) max Mac Serial Format: Apple Macintosh-compatible serial printer port Connector: 8-pin mini DIN female Cable Length: 50 feet (15 meters) max PC Serial Format: PC-compatible RS-232 serial port Connector: 25-pin D-subminiature female (DB25) Cable Length: 50 feet (15 meters) max...

  • Page 85: Appendix C. Wiring Diagrams Pin Assignments

    appendix c Wiring Diagrams Pin Assignments Balanced to Balanced Connection The USD’s LTC In and LTC Out connectors LTC Out Connector Device are balanced XLRs with Pin 2 wired “+” or “hot,” Pin 3 wired “–” or “cold,” and Pin 1 N.C.
  • Page 86 BiPhase/GPI/Pilot Bi-Phase/GPI/Pilot Bi-phase/Tach Inputs Bi-phase/Tach Universal Slave Driver...
  • Page 87 GPI Relay Outputs GPI Relay Output GPI (TTL)/MTC Outputs GPI TTL/MTC Output Appendix C: Wiring Diagrams Pin Assignments 83...
  • Page 88 GPI (opto) Inputs TPI (opto) Input Universal Slave Driver...
  • Page 89 Connector Pin Assignments Connector Pin Assignments Mac Serial Port Pin # Name Description Mac Connection No connection Pin 2 (HSKiB) RTS_IN Request To Send (input to USD) Pin 1 (HSKoB) RX_OUT Transmitted data (output from USD) Pin 5 input (RXDB-) Chassis ground Ground TX_IN...
  • Page 90 Connector Pin Assignments PC Serial Port Pin # Name Description Connected to chassis ground TX_IN Received data (input to USD) RX_OUT Transmitted data (output from USD) RTS_IN Request To Send (input to USD) CTS_OUT Clear To Send (output from USD) No Connection Connected to chassis ground 8-25...
  • Page 91 Connector Pin Assignments PILOT_IN- Pilot tone input, negative PILOT_IN+ Pilot tone input, positive RET0 Return from GPI opto-isolator “0” GPIN0 Input to GPI opto-isolator “0” RET1 Return from GPI opto-isolator “1” GPIN1 Input to GPI opto-isolator “1” RET2 Return from GPI opto-isolator “2” GPIN2 Input to GPI opto-isolator “2”...
  • Page 92 For Tach, the “rate” input is “BIPHA_I” GPI TTL WIring and the “direction” input is “BIPHB_I.” The circuit can drive approximately 2 mA The polarity of “BIPHB_I” is software pro- through a load of 1.6K and maintain a logic grammable and defaults to “low” for “for- high level of 3.3V.

  • Page 93: Index

    index Numerics 14/16 VITC line pair 48 character generation (see Window Dub) 1x 69 clock reference and resolving 32 256x 22, 69 choosing digital source 33 9-pin connectors 22 front panel LEDs 17 front panel switch 17 selecting a clock source 32 absolute time code (and LTC) 39 USD Setup 23 AC Mains Power Switch 17...
  • Page 94 firmware updating USD 14 kHz (sample rates) 18 flatbed and Bi-Phase/Tach 35 fps 23 frame edge 63 LED Time Code Display 18 frame rate LEDs 17, 18 configuring, front panel 31 Locked 19 front panel switch 19 LED and troubleshooting 19 USD Setup 23 LTC 11 freewheel duration 24...
  • Page 95 Resolver Locked 24 RUN/STOP+CLEAR 30 OMS 15 oscillator reset 64 sample rate and Speed Cal status display 19 choosing, front panel 31 about 24 front panel (sample frequency) 56 or NTSC, selecting 60 front panel LED displays 18 PC Serial port 20 SECAM 24 pin-outs 86 use PAL 60...
  • Page 96 related settings for 41 timing rule 50 Universal Slave Driver 1 video source rule 47 checking status in USD Setup 24 VSO 25 control options for 27 front panel operation 17 Up switch 29 updating USD firmware 14 window dub USD (see Universal Slave Driver) front panel enable 58 generating 51...

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