Lynx Yellobrik CHD 1812 HDMI to SDI Converter with Frame Synchronizer

Product SKU: CHD-1812

Lynx Yellobrik CHD-1812, Supports SD/HD/3G -SDI formats, 3D support, Integrated Frame Synchronizer, 2 x SDI outputs with optional SDI fiber output

£777.60 (inc. VAT)

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Lynx Yellobrik CHD 1812
Lynx Yellobrik CHD 1812 HDMI to SDI Converter with Frame Synchronizer

£777.60 (inc. VAT)

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Lynx Yellobrik CHD-1812 HDMI to SDI Converter with Frame Synchronizer

The Lynx Yellobrik CHD 1812 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 HD 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. 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. By default any audio present in the HDMI stream will be embedded into the SDI output or it can be replaced with the external audio signals.

The module is also compatible with the yelloGUI software package, which provides 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.


  • Supports SD/HD/3G -SDI formats
  • 3D support
  • Integrated Frame Synchronizer
  • Multi-format sync reference input – cross lock compatible
  • 2 x SDI outputs with optional SDI fiber output
  • HDMI embedded audio passed transparently
  • 2 x external analog audio inputs
  • Professional balanced analog audio inputs or unbalanced line level
    audio inputs
  • Selectable AES channel for embedding external audio
  • HDMI, reference and audio present LED indication
  • yelloGUI compatible to access additional internal settings
HDMI Input

3D compatible input using type A connector
Up to 8 channels embedded audio in HDMI is passed transparently or replaced with external analog audio input

Reference Input

SDTV: Analog 525 or 625 bi-level sync, black burst or colorbars
HDTV: All tri-level sync standards (exceptions 1080p 50/59.94/60Hz)
Cross lock compatible
SMPTE 274M, SMPTE 296M – 75 Ohm BNC connector

Frame Synchronizer

Functional if valid reference is detected, otherwise operates in free run (asynchronous) mode. External audio and HDMI input are frequency locked to external reference, fully cross lock compatible across standards.One frame adjustable delay (in line and pixel increments) using yelloGU

SDI Outputs

2 x SDI video, 75 Ohm BNC. (both have the same signal – NOT dual link)
3G Level A & B-DL & B-DS according to SMPTE ST 425-1 and ST 425-2 (3D) with image formats 1280 x 720 and 1920 x 1080

Fiber Output

Optional plug in SFP for optical SDI output (see fiber options table)

Audio Inputs

Left and right analog audio using 1/4 inch jack plugs
10k Ohm differential balanced input mode with 24,22,20,18,15,12 dBu full scale (selectable)
Unbalanced mode with (line level) at -10 dBV(1/4 inch 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: <+/- 0.2dB 20Hz to 20KHz
48kHz A/D sample rate (free run or frequency locked to reference input)


+12VDC @ 4.7W nominal – ( supports 10 – 14VDC input range )


Size: 138mm x 90mm x 22mm (5.43” x 3.54” x 0.86”) including connectorsWeight: 230g (8.11oz


5 – 40ºC (41 – 104ºF) 90% Humidity (non condensing)


Module, AC power supply, RCA adapters, HDMI + USB cable

Converter Type

Frame Sync, HDMI Converters

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