Kramer VM-4UX
1:4 4K 12G SDI Distributor


The Kramer VM-4UX is a compact, high performance 1:4 4K distributor for standard broadcast-grade SDI signals of up to 12G transmitted data rate. The VM-4UX auto-adapts to the data rate of one SDI input signal, equalizes and re-clocks the signal to improve transmitted signal reach, and distributes the signal to four identical SDI outputs.


  • SDI video production studios
  • Broadcast studio and field SDI video production events
  • Staging and rental deployments
  • Medical facilities with highly reliable video deployments

Kramer VM-4UX Includes:

  • Power supply
  • Mounting bracket
  • 2 male BNC 75 ohms terminators

Kramer VM-4UX Features:

  • 1:4 SDI distributor
  • Resolution: Up to 4K (4:2:2) 30bpp
  • Data rate: Auto–adapting, up to 12Gbps
  • Input Reach: Up to 80m (260ft) at 12Gbps
  • Compliance: SMPTE standards
  • Lockable connections
  • Size: DigiTOOLS® — Mount 3 units side–by–side in a 1U rack space with the optional RK–3T rack adapter
  • Audio — E

Kramer VM-4UX Specifications:

  • Inputs: 1 SMPTE 259M (SD–SDI), 292M (HD–SDI), 344M (ED–SDI), 424M (3G HD–SDI), ST–2081 (6G–SDI) and ST–2082 (12G–SDI) compliant serial video, 75 ohms on a BNC connector
  • Outputs: 4 equalized and reclocked SMPTE 259M (SD–SDI), 292M (HD–SDI), 344M (ED–SDI), 424M (3G HD–SDI), ST–2081 (6G–SDI) and ST 2082 (12G–SDI), outputs 75 ohms on BNC connectors
  • Cable Equalization Reach: 12Gbps: Up to 80m (260ft), 3Gbps and 6Gbps: Up to 100m (330ft), 1.5Gbps: Up to 200m (660ft), SD: Up to 300m (980ft)
  • Video: Up to 4K@60Hz (4:2:2) 30bpp resolution, 270Mbps to 12Gbps data rate
  • Maximum Output Level: 800mVpp /75ohms
  • Coupling: AC
  • Standards Compliance: SMPTE 259M (SD–SDI), 292M (HD–SDI), 344M (ED–SDI), 424M (3G HD–SDI), ST–2081 (6G–SDI), ST–2082 (12G–SDI)
  • Power Consumption: 5V DC, 250mA
  • Power Source: 5.2V/4A
  • Enclosure: Tools size, Aluminum type
  • Cooling: Convection ventilation
  • Operating Temperature: 32° to 104°F (0° to +40°C)
  • Storage Temperature: –40° to 158°F (–40° to +70°C)
  • Humidity: 10% to 90%, RHL non–condensing
  • Options: RK–3T 19” rack adapter
  • Dimensions (WxDxH): 
    • Product: 4.72" x 2.81" x 0.96" (12.00 x 7.15 x 2.44cm)
    • Shipping: 9.13" x 4.72" x 3.50" (23.20 x 12.00 x 8.90cm)
  • Weight:
    • Product: 0.4lbs (0.2kg) approx
    • Shipping: 1.5lbs (0.7kg) approx
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