Decimator Design DMON-4S

Quad 3G/HD/SD-SDI to HDMI Multiviewer and converter

The DMON-4S is a truly portable converter, that incorporates a new easy to use LCD and button control system. This gives you easy access to all of the amazing features without using complicated LED/button control, dip switches or having to carry around a computer to change a simple setting.

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£578.00 £481.67
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The Decimator Design DMON-4S converter, with quad multi-viewer functionality, successfully condenses four independent SDI to HDMI converters into a tight, on-location friendly package. The DMON-4S empowers the user to convert four separate SDI streams to either four independent mini HDMI outputs, or combine them into a quad-split HDMI output.

The converter supports SD, HD and 3G-SDI formats and is capable of automatically detecting the quality of any input signal. The built-in LCD info screen and button controls also provide the ability to set output options without resorting to DIP switch settings, or connecting the unit to a desktop workstation.

Decimator Design’s DMON-4S can be set to one of several conversion options. From four SDI inputs to four HDMI outputs, four SDI inputs combined into a quad-split HDMI output on one, or all four of the HDMI outputs. It’s also possible to set the unit to translate two SDI inputs to HDMI and use the other two SDI inputs as loop through outputs.

From quad-split mode, you can assign the audio from any input to be deployed as the audio for every output. A threaded locking power socket assists in the prevention of accidental power loss from kickouts and the like.

Includes 4 independent mini HDMI outputs that can each output any of the four (3G/HD/SD)-SDI inputs or a Quad-Split of all them

For example you could use the unit to have:

  •  4 independent SDI to HDMI converters
  •  3 independent SDI to HDMI converters with a quad-split output
  •  2 independent SDI to 2 x HDMI converters with loop through
  •  A single SDI or Quad-Splt to 4 x HDMI outputs


Inputs 2 and 4 can be individually changed to output active loop copies of inputs 1 and 2 respectively.


Quad-Split mode allows selection of audio from any input.


This unit also includes

  • 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 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 Options

  • Status for all 4 inputs
  • HDMI output type and source selection from SDI inputs 1 to 4
  • Quad-Split output format selection
  • Quad-Split output aspect and type of 16:9 or 4:3 at either 90 or 100% of screen size 
  • Quad-split individual aspect format for each input of Same as output, Letter-box or Pillar-box
  • Quad-split Border Enable
  • Quad-split mode reference of either Free-run or inputs 1 to 4


  • Up to 4 x (3G/HD/SD)-SDI Inputs
  • Input Equalization > 100M using Belden 1694A 
  • USB for control and updates


  • 4 x mini HDMI Type C
  • Optional SDI Active Loop Out of inputs 1 and/or input 3


  • +5V to +32V DC, 6 Watts
  • Positive Centre Pin


  • 79.5mm x 123mm x 29.5mm (3.1” x 4.8” x 1.2”)