CHD 1412

4K HDMI to 12G-SDI Converter + Frame Synchronizer

Datasheet Quickreference


The CHD 1412 is a versatile and compact HDMI to SDI converter with integrated frame synchronizer. It is an ideal solution for any application which requires a fully synchronized SDI input from an external asynchronous HDMI source.

The flexible reference sync input will accept any analog video sync format including SD bi-level sync, black burst, colorbars and tri-level sync. The sync input is auto detecting and fully cross lock compatible. For example:  An SDTV reference can be used to frequency lock an HD HDMI input.  If no reference is present, the converter performs a standard asynchronous HDMI to SDI conversion. It can also lock to the HDMI input. A pair of stereo analog inputs can be embedded into any AES channel.  Audio inputs can be either professional balanced audio with selectable full scale level, or unbalanced consumer line level audio. Currently, PCM and AC3 audio present in HDMI stream are transparently passed through/ Embedded in selflock mode “Ref Source= Auto / HDMI” into the SDI output.

The module is also compatible with LynxCentraal and yelloGUI software packages, which provide access to a host of additional internal settings including adjustable video delay for timing purposes.

An SDI fiber output is also provided with a variety of plug in SFP options available.

Note: For legal reasons, HDMI capture devices from LYNX Technik AG are designed not to capture, convert or transmit video or audio from HDCP copy-protected sources (e.g. Satellite receivers, Cable receivers, BD players etc.)


  • Supports 12G / 6G / 3G / 1.5G / SD-SDI Signals
  • 3G-SDI Level A And Level B Support
  • Integrated Frame Synchronizer
  • Multi-Format Sync Reference Input - Cross Lock Compatible
  • 2 x SDI Outputs With Optional SDI Fiber Output
  • HDMI Embedded PCM and AC3 Audio Passes Transparently
  • Balanced Analog Audio, Unbalanced Line Level Audio, Or AES Input
  • Selectable AES Channel For Embedding External Audio
  • HDMI, Reference And Audio Present LED Indication
  • LynxCentraal & yelloGUI Compatible For Additional Internal Settings

Ordering Information

CHD 1412 4K HDMI to 12G-SDI Converter + Frame Synchronizer
OH-TX-12G-LC 12Gbit SDI Optical Transmitter
OH-TX-12G-XXXX-LC 12Gbit SDI Optical Transmitter - CWDM (XXXX=Wavelength 1270nm to 1610nm)
OH-TX-1 LC/SC/ST 3G Fiber Optic Basic Transmitter Option - 10km
OH-TX-4-XXXX-LC 3Gbit SDI Optical Transmitter - CWDM (XXXX=Wavelength 1270nm to 1610nm)
OH-TX-4-12G-LC 12G-SDI Single Channel Optical Transmitter with CDR
OH-TX-8-XXXX-LC Fiber Optic CWDM Transmitter Option 80km (XXXX=Wavelength 1270nm to 1610nm)