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Black compact converter box with HDMI input, dual BNC outputs and RCA audio ports

ATEN

ATEN VC840 HDMI to 3G-SDI Audio Video Converter

SKU CH-KAB7-SVSB1 MPN VC840

Converts HDMI to 3G-SDI with dual BNC outputs, analog and digital audio, and reclocking up to 300 metres

  • First connector1 x HDMI Type A Female
  • Second connector2 x BNC (Gold)
  • SoundAnalog: 2 x RCA (Red/White) Digital: 1 x RCA (Yellow)
  • Product typeHDMI to 3G-SDI/Audio Converter
  • Product colorBlack
  • Key featuresConverts an HDMI input signal to 3G/HD/SD-SDI formats in rea
  • Converts HDMI to 3G/HD/SD-SDI without signal loss
  • Dual BNC outputs drive two displays up to 300 m
  • Supports 8-channel audio at 48 kHz via analog and digital RCA
  • Automatic format detection handles SD-SDI, HD-SDI and 3G-SDI
  • Compact 1.20 x 4.21 x 4.80 inch unit weighs .64 lbs

Signal Conversion

The ATEN VC840 is an HDMI to 3G-SDI audio video converter designed for professional broadcast and AV installations. It accepts a single HDMI Type A input and provides dual BNC outputs alongside analog stereo and coaxial digital audio connections. The unit converts signals in real time while preserving quality through reclocking technology.

Installation Suitability

This converter suits engineers integrating HDMI sources into SDI infrastructure for live production, post-production or signal distribution over long cable runs. It supports automatic format detection across SD-SDI, HD-SDI and 3G-SDI standards. Buyers who need HDMI output, multi-input switching or embedded audio extraction from SDI should consider alternative devices.

Output Reach

The single specification that determines suitability is the maximum transmission distance over RG6 cable: up to 300 metres for SD-SDI, 150 metres for HD-SDI and 90 metres for 3G-SDI. These distances define whether the converter can bridge the required link between source and destination without additional repeaters or fibre extenders.

How it compares

Measured against everything we stock in Video Signal Converters, at today’s prices. Recalculated every night.

Price $156.99
Pricier than about 90% of the 1,459 comparable items (median $17.99).

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Specifications

Product
Brand nameATEN
Model nameVC840
Product typeHDMI to 3G-SDI/Audio Converter
Product colorBlack
Audio & video
SoundAnalog: 2 x RCA (Red/White)
Digital: 1 x RCA (Yellow)
Ports & slots
First connector1 x HDMI Type A Female
Second connector2 x BNC (Gold)
Size & build
Product dimensions1.2 in × 4.21 in × 4.8 in
Product weight0.64 lb (0.29 kg)
Shipping weight0.61 kg
Package size231 × 175 × 66 mm

Questions about this item

How much power does the VC840 draw and does it run hot when converting HDMI to 3G-SDI all day?

The VC840 is a compact passive converter measuring 1.20" x 4.21" x 4.80" and weighing 0.64 lbs with no fan, so it generates minimal heat and draws very little power during continuous operation.

What cables or sources must I already have to connect the HDMI input and the two BNC outputs on this converter?

You need an HDMI Type A source cable for the input and two BNC cables for the dual SDI outputs; analog stereo uses red and white RCA cables while coaxial digital audio uses a yellow RCA cable.

Will the VC840 work with my older SD-SDI monitor that only accepts 270 Mbps signals?

Yes, the VC840 automatically detects and supports SD-SDI at 270 Mbps (SMPTE 259M) up to 300 m over RG6, as well as HD-SDI at 1.485 Gbps and 3G-SDI at 2.97 Gbps.

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