HD/SD Frame-Sync with 4K Up-Conversion

FS3 is a full-featured HD/SD frame-synchronizer, with HD/SD up/down/cross-conversion and realtime 4K up-conversion. FS3 syncs to analog, HD tri-level sync, SD Blackburst or to the incoming SDI signal. FS3 also provides integer frame rate conversion (3:2, 1:2, 2:1). Included are all the industry proven features provided in AJA frame synchronizers, such as full Video Proc Amp and RGB color correction, region of interest scaling, extensive audio controls and routing, web UI control, GPI triggers and more.

The growth of 5.1 and 7.1 audio has further increased the number of audio channels that must be managed in a production. FS3 accepts embedded SDI audio on all four SDI inputs (two coax and two optional fiber) and has an internal 64 x 64 audio matrix that allows routing of all embedded audio channels. Besides audio level, phase, and delay controls, FS3 also provides for 5.1 and 7.1 mixdown to stereo.

$2,995 US MSRP*

* Pricing is for US only. International pricing will vary.


FS3 utilizes standard BNC as well as optional fiber inputs and outputs to integrate easily into a variety of workflows and facilities. Embedded audio can be routed using the internal matrix router to align audio channels as needed.

FS3 has BNC and fiber* inputs to accept HD or SD resolution SDI signals. The up-converted 4K signal is output to two sets of BNC and fiber* connections, allowing the output to be routed to multiple locations simultaneously without the need for any external signal distribution.

A looping Reference input allows the FS3 to be locked to your house reference signal for rock-solid stability.

* Fiber inputs and outputs are optional.

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Multiple Format Support

FS3 is a HD/SD frame synchronizer combined with high quality 4K/UltraHD up-conversion technology.

Seamlessly incorporate HD and SD signals into 4K/UltraHD workflows or operate as a standard 3G-SDI, HD and SD up, down, cross synchronizer. AJA’s adaptive scaling algorithms, paired with our well-known conversion technology, ensures your converted images will have the maximum quality possible.

Input HD or SD resolution via BNC or fiber and send HD, SD or up-converted 4K/ UltraHD to multiple BNC and fiber outputs simultaneously. Utilizing AJA’s remarkable conversion algorithms, FS3 supports up-conversion to 4K or UltraHD video carried on quad 3G-SDI BNCs, dual 3G-SDI BNCs, or optional fiber LC SFP outputs. Both Quadrant (Square Division) and 2SI (Two Sample Interleave) output formats are supported.

AJA Hardware Conversion Technology

We bring the same AJA conversion technology to FS3 as we have to all our other conversion products, ensuring your legacy material can move with you to 4K with the highest image quality for your productions. 

Fiber I/O option

FS3's Fiber I/O option allows fiber cable runs of up to 10 kilometers to be connected directly to the FS3 without the need for separate fiber to SDI conversion. Multiple wavelength CWDM options are also available.

Fiber connector supported:

Single-channel LC connector modules
Single-channel SC connector modules
Dual-channel LC connector modules

Remote Configuration and Control

FS3 is network ready and supports SNMP monitoring and web-based remote control. Units can be connected to any Ethernet network via the built-in 10/100/1000 Ethernet port, allowing control and configuration of multiple FS units from any web browser on a connected computer. Configurations can be saved and applied to multiple units, ensuring consistency and quick configuration in large installs.

To integrate smoothly with the existing automation of a facility, FS3 can also receive external GPI commands to trigger a variety of functions.

Closed Captioning conversion

FS3 supports closed captioning and the conversion of closed captioning between HD/SD and 4K formats - including full conversion of CEA-608 and CEA-708 standards. FS3 can preserve closed captioning even when converting between formats, removing the need to reinsert captions after conversion.

Active Format Description

Automatically sets Active Format Description (AFD) information to match the converted signal. This means AFD information does not have to be inserted after conversion and provides accurate information for devices that understand AFD.


FS3 is designed to meet the demands of broadcast engineering and live event production while providing incredible flexibility. Select any of the various inputs for conversion and route to all available outputs simultaneously.

Dual, redundant power supplies ensure uninterrupted power even in the event of a power supply failure.

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Industry-Leading Support

AJA’s technical support is recognized as among the best in the industry and is available to all AJA customers. If you need assistance with any aspect of your FS installation, configuration, operation or encounter any technical issue,  AJA Support will work with you to get up and running.

FS products are covered by a generous five year warranty.

Tech Specs

Video Input Digital

  • Four 3G-SDI inputs, 2 BNC and up to 2 fiber (optional)
  • 4x1 selector feeds video processor
  • SD/HD/3G-SDI, SMPTE-259/292/424, 8 or 10-bits
    • 3G-SDI Level A, Level B-DL, or Level B-DS
    • Dual Link HD-SDI (2x 1.5G), SMPTE -372
    • Single Link SD/HD/3G-SDI
  • Fiber SDI, SMPTE-297, 8 or 10-bits (optional)
    • Dual Channel LC connector modules
    • Single Channel LC connector modules
    • Single Channel SC connector modules
  • Formats and frame rates
    • (2K) 2048 x 1080p 23.98, 24, 25, 29.97, 50, 59.94
    • (HD) 1920 x 1080p 23.98, 24, 25, 29.97, 50, 59.94
    • (HD) 1920 x 1080PsF 23.98, 24, 25, 29.97, 50, 59.94
    • (HD) 1920 x 1080i 50, 59.94
    • (HD) 1280 x 720p 50, 59.94
    • (SD) 625i 50
    • (SD) 525i 59.94
    • YCbCr, 4:2:2, 10-bit

Video Output Digital

  • Twelve 3G-SDI outputs, 8x BNC and up to 4x fiber (optional)
  • Video processor feeds all outputs
  • SD/HD/3G-SDI, SMPTE-259/292/424, 8 or 10-bits
    • Quadrant (Square Division) or 2SI (Two Sample Interleave) 4K/UltraHD pixel mapping
    • 3G-SDI Level A, Level B-DL, or Level B-DS
    • Quad 3G-SDI for 4K/UltraHD p50/59.94 (3 copies on Quad SDI)
    • Dual 3G-SDI for 4K/UltraHD p23.98/24/25/29.97 (6 copies on Dual SDI)
    • Single Link SD/HD/3G-SDI (12 copies on single SDI)
  • Fiber SDI, SMPTE-297, 8 or 10-bits (optional)
    • Dual Channel LC connector modules
    • Single Channel LC connector modules
    • Single Channel SC connector modules
  • Formats and frame rates:
    • (4K) 4096 x 2160p 23.98, 24, 25, 29.97, 50, 59.94
    • (UltraHD) 3840 x 2160p 23.98, 24, 25, 29.97, 50, 59.94
    • (2K) 2048 x 1080p 23.98, 24, 25, 29.97, 50, 59.94
    • (HD) 1920 x 1080p 23.98, 24, 25, 29.97, 50, 59.94
    • (HD) 1920 x 1080PsF 23.98, 24, 25, 29.97, 50, 59.94
    • (HD) 1920 x 1080i 50, 59.94
    • (HD) 1280 x 720p 50, 59.94
    • (SD) 625i 50
    • (SD) 525i 59.94
    • YCbCr, 4:2:2, 10-bit

Audio Input Digital

  • 64-Channels via four 16-Channel audio disembedders (1 disembedder per SDI input)
  • SD/HD/3G-SDI, SMPTE-272/299
  • 20-bit SD, 24-bit HD/3G, 48 kHz sample rate
  • Drop/repeat sample rate conversion to match output reference

Audio Output Digital

  • 64-Channels via four 16-Channel audio embedders
  • SD/HD/3G-SDI, SMPTE-272/299
  • 20-bit SD, 24-bit HD/3G, 48 kHz sample rate
  • 64 x 64 mono audio matrix

Video Processing

  • Proc amp controls
  • Color corrector
  • Legalizer
  • Frame rate conversion (3:2, 1:2, 2:1)
  • Delay 0-6 frames with H and V controls
  • Closed Captioning conversion (CEA-608/CEA-708)
  • AFD input detection, down-convert control, and output pass through or overwrite
  • Freeze (manual or on input signal loss) to black or last good frame
  • Matte generator for background fill
  • Video test generator
  • Nominal video delay
    • 4K/UltraHD, 3 frames (LFR), 6 frames (HFR)
    • HD/SD, 2 frames (LFR), 4 frames (HFR)

Format Conversion

  • Convert any supported input HD/SD format to any supported 4K/UltraHD/HD/SD output format, as long as the input and output frame rates are of the same frame rate family. These three families are:
    • 59.94, 29.97, 23.98
    • 50, 25
    • 24


  • Zoom in and out
  • Reposition
  • Region of Interest


  • SD/HD/2K to UltraHD/4K
  • SD to HD/2K
  • Hardware 10-bit
  • Zoom 14:9: results in a 4:3 image zoomed slightly to fill a 14:9 image with black side bars
  • Zoom Letterbox: results in image zoomed to fill fullscreen
  • Zoom Wide: results in a combination of zoom and horizontal stretch to fill a 16:9 screen; this setting will introduce a small aspect ratio change


  • HD/2K to SD
  • Hardware 10-bit
  • Anamorphic: fullscreen
  • Letterbox: image is reduced with black top and bottom added to image area with the aspect ratio preserved
  • Crop: image is cropped to fit new screen size

Aspect Ration Conversion

  • Letterbox: This transforms SD anamorphic material to a letterboxed image
  • H Crop: Will produce a horizontally stretched effect on the image; transforms anamorphic SD to full frame
  • SD Pillarbox: Will produce an image in the center of the screen with black borders on the left and right sides and an anamorphized image in the center
  • V Crop: Will transform SD letterbox material to an anamorphic image

Audio Processing

  • 64 x 64 mono audio matrix, route 1 to 1, 1 to many
  • Independent controls for each channel
    • Gain +18 to -18 dB in 0.5 dB steps
    • Delay -16ms to 256 ms in 20.8 us steps
    • Phase invert
  • 5.1 or 7.1 to stereo mixdown with gain adjust
  • Audio test generator


  • SDI RP188 via SDI BNC

Reference Input

  • Blackburst or tri-level sync
  • Looping, nonterminating

Network Interface

  • 10/100/1000 Ethernet (RJ-45)
  • Embedded web server for remote control

Machine Control

  • GPI in/out, 15-pin D-connector
    • Pinout is as follows :
      1 GND 9 GPI OUT 2
      2   GPI IN 1 10   GPI I/O GND 3          
      3 GPI IN 2 11 GPI I/O GND 4
      4 GPI IN 3 12 GPI OUT 3
      5 GPI I/O GND 1           13 GPI OUT 4
      6 GPI I/O GND 2 14 NC
      7 GPI IN 4 15 GND
      8 GPI OUT 1    


  • RS-422, Sony 9-pin protocol (reserved for future use)

Size (w x d x h)

  • 17.5” x 16.0" x 1.75" 1RU (444.5 x 406.4 x 44.45 mm)


  • 7.9 lb (3.6 kg)


  • 100-240 VAC 50/60 Hz (Dual, redundant power supplies), 55W typical; 80W max.


  • Safe Operating Temperature: 0 to 40 C (32 to 104 F)
  • Safe Storage Temperature (Power OFF): -40 to 60 C (-40 to 140 F)
  • Operating Relative Humidity: 10-90% noncondensing
  • Operating Altitude: <3,000 meters (<10,000 feet)