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XIP-3901-FS Frame Sync & Gearbox

Dual-channel 12G/Quad Link 3G/3G/HD-SDI Frame Synchronizer and Gearbox with HDR Application for XIP-3911 and XIP-3901

The XIP-3901-FS application is a dual-channel 12G/quad link 3G/3G/HD-SDI frame synchronizer with gearbox functionality, which is designed to synchronize and convert color space between ITU-R BT.2020 and ITU-R BT.709 in 4K UHD, 1080p and HD broadcast productions. The XIP-3901-FS application will delay 12G/3G/HD embedded audio and metadata to maintain synchronization with video. 


  • Independent dual processing channels
  • HD 720p/1080i, 3G 1080p, quad link 3G and 12G 2160p inputs and outputs
  • 12G-SDI Mode 1 and Type 1
  • Quad link 3G in 2SI and square division
  • 3G level A & level B dual link
  • 12G-SDI to/from quad link 3G in 2SI/square division
  • Integrated frame synchronizer (freeze to last valid frame on error)
  • Minimum processing delay mode available when input and output formats are the same
  • Audio/video deglitcher to handle video hot switch at the input
  • XIP-3901-UDC-HDR option provides HDR conversion supporting both Wide Color Gamut BT.709/ BT.2020 and High Dynamic Range: HLG, PQ and S-Log3:
    • All processing operates in full 10-bit video signals with ability to pass sub-blacks and super-whites in SMPTE narrow video 
    • Choice between Grass Valley conversions algorithms, BBC HLG LUT v1.4 and user defined 3D-LUT support 
    • ITU R BT 2111 HLG/PQ color bar test patterns 
  • External reference or URS frame reference
  • Embedded audio and metadata delay and synchronization
  • GV Orbit for configuration, control and monitoring
  • Individual XIP-3911 and XIP-3901 applications licensed, purchased as needed
  • Rapid switching between applications


SDI (Inputs/Outputs) 

Physical: 16 HD-BNC connectors: 8 in, 8 out 

SDI Standard: 

  • SMPTE ST 292 (1.485, 1.485/1.001 Gb/s) 
  • SMPTE ST 424 (2.970, 2.970/1.001 Gb/s) 
  • SMPTE ST 2082-1:2015 (in 1 & 5, out 1 & 5)

Supported Input/Output Formats: 

  • HD: SMPTE ST 274: 1080i59.94, 1080i50 
  • HD: SMPTE ST 296: 720p59.94, 720p50 
  • 3G: SMPTE ST 425 level A (mapping 1), level B dual link: 1080p59.94, 1080p50 
  • 4K UHD: Quad Link 3 Gb/s SMPTE ST 425-5: 1080p59.94, 1080p50 
  • 12G: SMPTE ST 2082-10: 2160p59.94, 2160p50 

Cable Length (Belden 1694A): 

  • HD: 250m (820 ft.) at 1.485 Gb/s 
  • 3G: 150m (492 ft.) at 2.970 Gb/s 
  • 12G: 55m (180 ft.) at 11.88 Gb/s 


  • HD/SD: <0.2 UI (alignment jitter) 
  • 3G: <0.3 UI (alignment jitter) 
  • 12G: <0.3 UI (alignment jitter) 
Reference Input 

Physical: SMPTE ST 170/SMPTE ST 318/ITU 624-4 blackburst 

Ethernet Port for Media 

Not used by this application 

Ethernet Port for Control 

Physical: One electrical RJ45 port 

Standard: IEEE 802.3 1000 Mb/s 

Video Processing Performance 

Signal path: 10 bits minimum 


Power: 60W maximum


Application Software


12G/3G/HD SDI Dual Frame Sync and Gearbox application

Application Option


HDR processing option


Densité 3+ Frame


Agile SDI/IP processing platform


Double rear panel for Densité 3+ with HD-BNC

Remote Control

GV Orbit version 1.2, iControl or iControl Solo (version 7.50 or higher required)




Densité 3+ XIP-3901-FS is an application that provide a dual-channel 12G/quad link 3G/3G/HD frame synchronizer with gearbox functionality, which is designed to synchronize and convert color space between ITU-R BT.2020 and ITU-R BT.709 in 4K UHD, 1080p and HD broadcast productions.


The Densité 3+ XIP-3901 from Grass Valley is an agile processing platform that focuses on high-quality live production for HD, 1080p, 4K UHD and HDR.

This platform is a bridge for the hybrid world, consisting of today's proven SDI technology and the IP connectivity of tomorrow. To meet customers' needs both now and in the future, the XIP-3901 uses a flexible "virtualized" hardware platform. Based on a powerful FPGA engine, the XIP-3901 can be reconfigured with software updates for different applications as requirements change.



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