As an option, some Hippotizer V4 units are fitted with an SDI output as standard. This accomplished by converting the output as an HDMI signal to SDI. Each output is individually controlled, accessed by three buttons on each output.

Changing Resolutions

To change the resolution, press the adjust resolution button. This will toggle between output resolutions. The output is capable of scaling any input resolution to any output resolution using an on-board scaler.

As the button is pressed, the resolution light will change to indicate which SDI standard is being used: SD, HD or 3G. A small box appears on the output to indicate what the output resolution is being sent.

Note: There are several resolutions within each SDI standard, so it takes several button presses to move from SD to HD.

Supported SDI output Resolutions

  • 720 × 480i
  • 1280 × 720P
  • 1920 × 1080i
  • 1920 × 1080p
  • 2048 × 1080p

Changing Frame Rate

To change the frame rate, press the centre button. This will cycle between 50 and 60hz. It is advised to match the input and output framerates.
Output frame rates of 25, 30, 50, 59.97 and 60 are supported.

Note: All output frame-rates and resolutions are available in free run mode only.


The SDI output has two modes of frame generation: Free-Run and Self Genlock. In Free-Run mode, any single can be scaled to any resolution. However multiple outputs will not be in-sync with each other. In order to ensure all outputs are synchronised, set the boards to Self Genlock. In Self Genlock mode, the outputs lock to the vertical refresh of the incoming signal. This means that as long as the outputs are Genlocked then the SDI will be as well.

To toggle the Genlock Mode, hold the centre button for several seconds. A window will appear on screen to say “Self Genlock” or “Free Run”.

Note: For Genlock to work correctly, the Graphics card must also be Genlocked through the ATI FirePro control centre.

In Genlock Mode, the scaling is limited:

An input of 720×480, Can be output as: 720×480i, 1280×720p, 1920×1080i and 1920×1080p

An input of 1280×720 can only output 1280 × 720p

An Input of 1920 × 1080 can output as: 1280 × 720p, 1920 × 1080i or 1920 × 1080p

An Input of 2048 × 1080 can output as 2048 × 1080 only.


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