CHD 1412

HDMI to 12G-SDI Converter with Frame Synchronizer

The CHD 1412 is a versatile and compact HDMI to 12G-SDI converter with an 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 accepts any analog video sync format including Black burst, Bi-Level, Color bars and Tri-Level. 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. 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.
PCM and AC3 audio present in the HDMI stream are transparently passed-through/embedded in selflock mode “Ref Source = Auto / HDMI” into the SDI output.

The 12G-SDI fiber output can be used with a wide variety of plug-in SFP options.

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.)

The module is fully compatible with yelloGUI and LynxCentraal, which provides access to a host of additional internal settings including adjustable video delay for timing purposes. It can be configured, controlled and updated using Windows or MacOS.

Key Features

Supports 12G/6G/3G/1.5G/SD-SDI Standards
Integrated Frame Synchronizer
“Cross-Lock” Compatible Reference Input
HDMI Embedded PCM and AC3 Audio passes transparently
Balanced Analog Audio, Unbalanced Line Level Audio and AES Inputs
HDMI, Reference and Audio Status LED

Video Formats
  4K  4096x2160p  23.98, 24, 25, 29.97, 30, 47.95, 48, 50, 59.94, 60 
  UHD 3840x2160p  23.98, 24, 25, 29.97, 30, 47.95, 48, 50, 59.94, 60 
  2K 2048x1080p   23.98, 24, 25, 29.97, 30, 47.95, 48, 50, 59.94, 60 
  HD 1920x1080p   23.98, 24, 25, 29.97, 30, 47.95, 48, 50, 59.94, 60
  HD 1920x1080PsF 23.98, 24, 25, 29.97, 30  -- --  --  --  -- --  -- 
  HD 1920x1080i   -- --  --  --  -- --  --  -- --  --  50, 59.94, 60 
  HD 1280x720p    23.98, 24, 25, 29.97, 30, -- --  --  50, 59.94, 60
  SD 720x625i     -- --  --  --  -- --  --  -- --  --  50, -- --  --
  SD 720x525i     -- --  --  --  -- --  --  -- --  --  --  59.94  --

Video Input Digital
  • 1x HDMI Type A connector, HDMI v2.0b
  • RGB 4:4:4
  • YCbCr 4:4:4/4:2:2/4:2:0
  • 8,10,12-bit

Video Output Digital
  • 2x 12G-SDI BNC (12G/6G/3G/1.5G/SD-SDI)
  • RGB 4:4:4
  • YCbCr 4:4:4/4:2:2
  • 8, 10, 12-bit
  • 3G-SDI Level A or B Dual Link
Audio Pass-Through
  • HDMI PCM Audio
  • HDMI AC3 Audio (passed transparently in HDMI self-lock mode)
Audio Input Analog
  • 2x 3.5mm mini Jack sockets for Left and Right audio
    Selectable AES channel for audio embedding (1 through 8)
    (Overwrites any HDMI embedded audio present in selected channel)

Left and right analog audio using 3.5mm jack plugs
10k Ohm differential balanced input mode with 24,22,20,18,15,12 dBu and User
defineable full scale level (selectable)
Unbalanced mode with (line level) at -10 dBV
(3.5mm Jack Plug to RCA connection adapters supplied)
Selectable AES channel for audio embedding (1 through 8)
(Overwrites any HDMI embedded audio present in selected channel)
Frequency response: <+/- 0.1dB 20Hz to 20KHz
48kHz A/D sample rate (frequency locked to SDI output)


Reference Input
  • 1x BNC Black Burst/Bi-Level or Tri-level sync
Fiber I/O
  • 1x Optional SFP
  • 12G-SDI
  • Duplex Single-mode
  • LC/PC Connection

Fiber Output
Optional SFP: 1x 12G-SDI Fiber LC connector, SMPTE-297M-2006/292M/424M/2081-1/2082-1

Key Features

Supports 12G/6G/3G/1.5G/SD-SDI Standards
Integrated Frame Synchronizer
“Cross-Lock” Compatible Reference Input
HDMI Embedded PCM and AC3 Audio passes transparently
Balanced Analog Audio, Unbalanced Line Level Audio and AES Inputs
HDMI, Reference and Audio Status LED

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