Decimator Design DMON-12S

1 to 12 Channel Multi-Viewer with SDI and HDMI OUTPUTS for 3G/HD/SD and Custom Layouts

The DMON-12S from Decimator Design is a low cost, miniature 12 to 1 Multiviewer. The 12 SDI inputs are independent of each other, meaning you can monitor a mix of 3G/HD/SD feeds.  Select from a variety of screen layouts depending on the number of feeds you wish to monitor.

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£1,548.00 £1,290.00
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The Decimator Design DMON-12S Multi-Viewer features 12 independent inputs capable of supporting 3G, HD or SD-SDI. This converter can be deployed either as a one-to-12-channel multi-viewer or 12-to-one-input multiplexer, compatible up to 1080p on input and output.

The DMON-12S is a condensed multi-viewer, complete with an LCD menu accessed via the front panel. It’s appropriate for both the field and studio applications because there’s no need for a computer or DIP switch to make selections and adjust settings.

The DMON-12S provides each window with 16-channel audio metering overlay, complete with individual enables, custom positioning and size. RS-422 and RS-485 support control the UMD position and size and enable the selection of tally display. In addition, its three outputs provide 3G, HD, HDMI or SD-SDI connectivity.

Activating the DMON-12S’ multi-view output mode enables the simultaneous selection and display of inputs with different formats and frame rates. Pass-through mode allows any of the 12 inputs to be selected for output via the SDI and HDMI outputs. Preset display layouts are available but you can also design and save your own custom layouts. 32 GPI provides the possibility to interface with additional devices for tally and remote switching.

  • Low cost miniature (3G/HD/SD)-SDI 1 to 12 Multi-Viewer or 12 to 1 input multiplexer
  • Custom Layouts with various standard layouts
  • Fast switching between inputs using Full-Screen scaling
  • Selectable output format in both Full-Screen Multi-viewer mode
  • Low latency buffering for each input allowing non-synchronous inputs
  • Linked (3G/HD/SD)-SDI and HDMI outputs
  • 12 x (3G/HD/SD)-SDI inputs with auto detection(26 Formats supported in total)
  • Each quadrant is independent of the others, allowing any 3G/HD/SD format of any frame rate to be displayed simultaneously
  • Variable aspect ratios per quadrant
  • In Pass-Through mode the selected input is passed through to both the (3G/HD/SD)-SDI and HDMI outputs
  • The DMON-12S is a truly portable converter, that incorporates our new easy to use LCD and button control system. This gives you easy access to most of the amazing features without using complicated LED/button control, dip switches or having to carry around a computer to change a simple setting.


This unit also includes

  • 32 GPI on 37-pin DSUB for Tallies
  • RS422/485 on 37-pin DSUB for Tallies
  • USB port for control and firmware updates
  • Heavy duty metal box
  • Metal Thread Locking DC Power Socket
  • Power Supply, HDMI Cable and USB Cable

More Information

SDI Input and Output Formats

3G:SMPTE [email protected] and 2.967Gb/s

  • 1080p@60/59.94/50Hz

HD:SMPTE 292M/274M/[email protected] and 1.435Gb/s

  •  1080i@60/59.94/50Hz
  •  1080p/psf@30/29.97/25/24/23.98Hz
  •  720p@60/59.94/50/30/29.97/25/24/23.98Hz 

SD:SMPTE 259M@270Mb/s

  •  625i50
  •  525i59.94

HDMI Output Formats

  • 1080p@60/59.94/50Hz
  • 1080i@60/59.94/50Hz
  • 1080p@30/29.97/25/24/23.98Hz
  • 720p@60/59.94/50/30/29.97/25 
  • 625i50
  • 525i59.94

LCD/Button Menu Buttons

  • HDMI output type
  • Multiviewr layout
  • Multiviewer or source selection
  • Multiviewer output format selection
  • Multiviewer output aspect and type of 16:9 or 4:3 at either 90 or 100% of screen size 
  • Multiviewer individual aspect format for each input of Same as output, Letter-box or Pillar-box
  • Multiviewer mode reference


  • 12 x (3G/HD/SD)-SDI Inputs
  • Input Equalization > 100M using Belden 1694A 
  • USB for control and updates


  • HDMI Type A
  • Optional SDI Active Loop Out of inputs 1, 3, 5, 7 or 9

LED Status

  • Power
  • 10 x Signal lock and rate


  • +5V to +32V DC
  • Positive Centre Pin


  • 220mm x 103.7mm x 29.5mm (8.7” x 4.1” x 1.2”)