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DMX in LD2000

 

  Enable DMX in software
  Output Control tab
  TTL, AUX and Shutter control tab

  DMX GENERAL
  About DMX512
  DMX devices
  Potential DMX problems
  DMX compared to other protocols
     
  DMX AND LASERSHOW DESIGNER
  DMX in LD2000
  Using DMX512 within Showtime
  Troubleshooting DMX
  
  DMX CONTROLLER BOARDS
  DMX price list

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  Using multimedia in Showtime 2000
  Combining two shows into one
  Running two projectors from one board
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  GENERAL INFO
 
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  About the ILDA Test Pattern
  About DMX512 (lighting control)
  Making 3D, floating images
  Laser Show Resource Guide
 
  TROUBLESHOOTING
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  Troubleshooting DMX
  Returning hardware to Pangolin

   
   
 

The QM2000 board has an on-board DMX port, so you can control external devices using the QM2000. Pangolin provides an adapter cable which goes from the QM2000's DB-15 connector (DB-9 on some early boards) to a DMX-standard female 5-pin XLR connector:

QM2OOO-to-DMX adapter cable
Other than the adapter cable, no additional hardware is needed to output DMX from any program that uses the QM2000 board.

Enable DMX in software

To use DMX output on the QM2000 board, it must first be enabled. This is done by selecting the Settings/DMX Settings menu from within LD or Showtime. The resulting screen is shown below. Note that there is only one tab because at this point, DMX is disabled.

DMX Settings screenshot

Once you click on "Enabled for output", then two additional tabs will become visible.

Output Control tab

The Output Control tab is where you select the number of output channels you want, along with various other output parameters that help ensure that DMX is being reliably transmitted.
        How can you tell whether DMX is being received by your devices? Most DMX receivers have an indicator light which will indicate whether or not DMX is being received. Indicator lights are implemented differently on every different DMX receiver. Some blink when reception is reliable, others are a solid color, and some even change colors. See the user's manual that comes with your DMX device for details on the DMX indicator light.
        If the receiver is not receiving the DMX signal reliably, you can try increasing all of the delay values to max and see if reliable reception is detected. If increasing the delay values to their maximum values does restore reliable operation, you can then decrease the delay sliders one by one, until reception becomes unreliable again, then increase it by a safety margin.
        If increasing the delay values to max does not help, you should troubleshoot the connectors, cabling and DMX receiver. If the cable is very long, one cause of the DMX not being received properly is that the end of the cable is not terminated. With DMX, as with other daisy-chain networks, the last device must be "terminated". This is done with a connector that has a 120 ohm resistor tied between pins 2 and 3.

TTL, AUX, and Shutter channels tab

In the TTL, Aux and Shutter channels tab, you can route the Showtime TTL and Aux Outputs to any DMX512 channel. In addition, you can also route the graphics shutter to a DMX channel if desired. This is the quickest way to get up and running with DMX on LD2000, if you have a show that you created on the older LD (QM32) system.
        Note that it is also possible to have the TTL, Aux output and Shutter output not routed to any DMX channel by selecting "(not output to DMX)" in the drop down list boxes.
        Also note that the DMX Graphics Shutter output is provided in addition to the analog graphics shutter output on pin 13 of the ILDA DB25 connector. The selection for the DMX channel routing of the graphics shutter only effects DMX output -- it has no effect on the analog voltage found on pin 13 of the ILDA DB25 connector.

DMX Settings/TTL, AUX, Shutter Channels screenshot

< Previous page: DMX compared to other protocols        Next page: Using DMX512 within Showtime >

   
  This page last updated: Thursday, June 25, 2009 12:00 AM

 
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     Using multimedia in Showtime 2000
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