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VISTEK V1626 User Manual

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VISTEK V1626
DIGITAL TO ANALOGUE
CONVERTER USER GUIDE
www.pro-bel.com
1

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Summary of Contents for VISTEK V1626

  • Page 1 VISTEK V1626 DIGITAL TO ANALOGUE CONVERTER USER GUIDE www.pro-bel.com...

  • Page 2: Table Of Contents

    VISTEK V1626 digital to analogue converter Contents OVERVIEW ......................3 INSTALLATION......................4 Introduction......................4 Installing Modules ....................4 Rear Panel Connections ..................5 Front Panel Controls ....................6 ON BOARD CONTROLS & ADJUSTMENTS ............7 Main Board ......................7 Matrix Sub-board ....................9 CALIBRATION OF V1626 DAC MODULE.............10 Introduction......................10 Test Equipment.....................10...

  • Page 3: Overview

    OVERVIEW The V1626 10 Bit Monitoring DAC Module provides 10 bit conversion between a Component Serial Digital input signal to RGB or YPbPr output (N10/SMPTE levels), a dedicated re-clocked Serial Digital output as DA and a separate Sync O/P is also provided.

  • Page 4: Installation

    INSTALLATION Introduction This section gives information on installing the V1626 DAC modules into the V1601 and V1603 interface frames and details on the connections which can be made to it. Information is also supplied on the function of each Preset adjustment and switch which are made available to the user on the front panel.

  • Page 5: Rear Panel Connections

    VISTEK V1626 digital to analogue converter Rear Panel Connections AII the input and output connections are available on the rear panel as shown below. Serial Digital Input: SD (IN) This BNC connector is internally terminated with 75 Ohms. The Serial Digital Input should be connected to this BNC.

  • Page 6: Front Panel Controls

    VISTEK V1626 digital to analogue converter Front Panel Controls A view of the front panel indicators and controls is shown below. Front Panel Indicators The +V lamp indicates that power is applied to the module. The REM lamp indicates that the module/control system communications link is accessing the module.

  • Page 7: On Board Controls & Adjustments

    VISTEK V1626 digital to analogue converter ON BOARD CONTROLS & ADJUSTMENTS Main Board Locations of switches and Preset potentiometers are shown in the figure below. To gain access to these controls and adjustments the board must be removed from the chassis. If the adjustments need to be made while the unit is powered up, an extender card needs to be used.
  • Page 8 VISTEK V1626 digital to analogue converter When reference is given to the direction / position of switch settings, it assumes that the module is in the vertical position as in the rack with its control panel on the left. Switch...

  • Page 9: Matrix Sub-Board

    VISTEK V1626 digital to analogue converter Matrix Sub-board The matrix sub-board is designed to convert a Y, Pb, Pr component N10 level signal into an RGB output. By means of switches on the sub-board, it is also possible to by-pass the matrix section and provide the Y, Pb, Pr output signal at N10 or Betacam levels.

  • Page 10: Calibration Of V1626 Dac Module

    VISTEK V1626 digital to analogue converter CALIBRATION OF V1626 DAC MODULE Introduction This section is intended to provide sufficient information to allow an engineer to calibrate the DAC system. Calibration should only be carried out if the unit has been mal-adjusted, or if drift has occurred over an extended period of time.

  • Page 11: Calibration Procedure

    VISTEK V1626 digital to analogue converter Calibration Procedure Initial Set-up: Ensure the following switches are set as detailed before starting calibration. Switch Setting Function SW1-1 10 bit operation enabled SW1-2 Black clip disabled SW1-4 Vertical interval data blanked SW5, 6, 7...

  • Page 12: N10/Smpte Level Adjustment (Including Syncs)

    700 mV peak to peak. Set the TSG 422 generator to provide 525 100% colour bars. Check that the Y, Pb, Pr levels have not deviated from those set above. This completes the V1626 DAC Module calibration. Issue 1...

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