Active Silicon

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Harrier SDI Adapter

Part Number: AS-ADP-SDI-001-A

  • Single channel host-end USB 3.0 acquisition solution for 3G/HD-SDI.
  • Compatible with Active Silicon’s Camera Interface Boards for Tamron and Sony block cameras.
  • Auto-sensing and decoding of HD-VLC™ compressed input signals for long cable length applications.
  • BNC input connector for coaxial cable applications.
  • RJ45 input connector for twisted-pair cable applications.
  • Auto-sensing of active input.
  • SuperSpeed USB Video Class (UVC) v1.1 output.
  • HDMI output.
  • 3G/HD-SDI BNC output with separate HD-VLC™ control.
  • Simultaneous display on all outputs.
  • RS-485 remote camera control via UVC or USB-UART.
  • Built-in standalone test pattern generator.
  • Mode selection switches and status LEDs.
  • Compliant with SMPTE 274M and SMPTE 296M.
  • Bus-powered via USB or header.
  • RoHS compliant.
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  • Description

  • Product Specs

  • Downloads

  • Other Information


Products Specs


Other Information

The Harrier SDI Adapter is designed for format conversion of 3G-SDI and HD-SDI video streams. The input signal is supplied via the BNC connector, or as a twisted-pair via the RJ45 connector. Three output formats are supported: 3G-SDI / HD-SDI output (via BNC), HDMI output, and SuperSpeed USB Type-C output providing USB Video Class (UVC) v1.1 compliant video streaming. A remote camera may be controlled using RS-485 comms via either the SuperSpeed USB port using a compatible UVC application, or via the separate USB-UART Micro-B interface. The RS-485 port and twisted-pair input share the RJ45 connector.

As well as standard 3G / HD-SDI streams, the unit automatically decodes HD-VLC™ encoded video streams which may typically come from a Tamron or Sony block camera fitted with one of Active Silicon’s Harrier Camera Interface Boards. Using this end to end HD-VLC™ solution allows for long cable lengths (see Active Silicon’s White Paper on long-reach HD digital video solutions with this technology).

The unit is available as a board (as in product image), or as a cased version for use with a PC or laptop.

General information

Power Options

In both the board and cased versions, the unit may be bus powered from either USB port. The board version also has a power header for a fixed system power supply. If multiple power sources are connected, an internal power switch selects the appropriate source with the following priority:

1. System power header.
2. USB-C port.
3. USB Micro-B port.

Application Information

For maximum cable length applications, the input signal should be supplied to the BNC input using a good quality coaxial cable. For shorter cable length applications, the input signal may alternatively be supplied to the RJ45 input using twisted pair cable.

The unit auto-detects which input is connected, and if both are connected it gives priority to the BNC.

The input video format and frame rate are automatically detected, as is HD-VLC™ compression. The
selected input, speed (3G/HD) and use of HD-VLC™ are indicated on the status LEDs.

The RS-485 communications to the camera may be controlled via the USB Micro-B control port, or via the
USB-C port which serves as both video output and UVC control input. This selection is made via DIP switch.

The HDMI and SDI outputs are always enabled. The USB-C Video output is enabled when the port is
connected to a host SuperSpeed USB 3.x port. Connection to a host USB2.0 port will display an error.

The SDI output has a separate HD-VLC™ control, which means the unit can also be used to compress a standard 3G/HD-SDI input video stream.

Host Software

An example application with full source code is available from Active Silicon to demonstrate how to receive, record, display and save image data from the USB Video Class driver.

Mechanical Overview

See “Other Information” tab above for mechanical overview diagram.

Cased Version

A cased version of the board is available. An image is available under the “Other Information” tab above and in the datasheet.

Connector specifications

BNC Input Connector (SDI RX1)

The coaxial cable input is a standard 75 Ohm BNC. This input accepts 3G-SDI, HD-SDI and HD-VLC encoded SDI video streams.

Connector type: 75 Ohm BNC

RJ45 Input Connector (SDI RX0)

The twisted pair input uses a standard RJ45 connector. This input accepts 3G-SDI, HD-SDI and HD-VLC encoded SDI video streams.

Connector type: RJ45

See datasheet for pin assignment.

BNC Output Connector (SDI TX)

The output BNC is a standard 75 Ohm BNC connector. This provides 3G-SDI, HD-SDI and HD-VLC
encoded SDI data.

Connector type: 75 Ohm BNC

HDMI Output Connector (HDMI TX)

This connector provides HDMI output for display.

Connector type: HDMI Type A

USB 3.1 Connector (USB VIDEO TX)

This USB connector provides standard UART serial interface for camera control. This is typically used to enable the VISCA camera control protocol to be used with block cameras from Sony and Tamron.

Connector type: USB Micro-B

System Power Header (PWR)

This internal connector can be used to power the board when USB is not used.

Connector type: 2-pin boxed header.

SDI Test Connectors

These two micro-coax connectors are used in manufacturing for circuit verification.

Connector type: Micro-coax.

JTAG Connector

Test connector used in manufacturing for circuit verification.

Mode switch and LED specifications

Mode DIP Switches (SW1)

The unit is fitted with a 4-way DIP switch to select various modes.

See datasheet for the details and configuration of the DIP switch SW1.

Status LEDs (LED1, LED2, LED3, LED4)

The unit is fitted with four LEDs to provide device status.

See datasheet for the details on function and states of the LEDs.



Compliant with SMPTE 274M and SMPTE 296M.


To meet EMC and FCC requirements the interface board has been designed to meet these requirements when housed in a suitable enclosure:

CE – CE-marked and compliant with the relevant EU directives as listed below.

RoHS – Conforms to RoHS3, the European Union’s Restriction on Use of Certain Hazardous Substances (RoHS) in Electrical and Electronic Equipment Directive 2015/863/EU.

EMC – Compliant with EN 55022:2010 (class A) and EN 55024:2010 in accordance with EU Directive 2014/30/EU Electromagnetic Compatibility.

REACH – Compliant with the requirements of REACH (Registration, Evaluation, Authorization and Restriction of Chemicals, EC 1907/2006), the European Union’s chemical substances regulatory framework for Substances of Very
High Concern.

UL – All printed circuit boards used in this product are manufactured by UL recognized manufacturers and have a flammability rating of 94-V0.

FCC – Compliant with FCC Rules for Class A digital devices.

Physical and environmental details


120mm by 79mmm.


Board only: 62g

Housed unit: 248g

Power Supply:

5V ±5%.

Power Consumption:

J7 (USB Type C) or J1 (System Power Header): Maximum 3W

J3 (USB Micro-B): Maximum 2.5W

Storage Temperature:

-20°C to +70°C.

Operating Temperature:

-5°C to +60°C (ambient environment).

Relative Humidity:

10% to 90% non-condensing (operating and storage).

Ordering Information

Part number Description


Harrier SDI Adapter – Board only.


Harrier SDI Adapter – Cased version.

Download File Type File Size


Harrier SDI Adapter pdf 787.75 KB

Manuals & Quicks Start Guides

Harrier SDI Adapter Quick Start Guide pdf 218.05 KB

Other Downloads

HarrierSDK Software Development Kit zip 11.81 MB
USB devices browser by Microsoft zip 265.28 KB
Technical note - Harrier SDI Adapter: Known issues with Media Foundation pdf 62.52 KB