tvONE 1T-VS-647 – 3G-SDI to HDMI Scaler with Loop-Thru is backordered and will ship as soon as it is back in stock.
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Product Overview
The tvONE 1T-VS-647 converts 3G-SDI, HD-SDI, and SD-SDI signals to HDMI output with integrated scaling, making it an essential tool for bridging broadcast SDI infrastructure with HDMI displays and monitors. It accepts all major SMPTE SDI standards at bit rates up to 2.970 Gb/s, covering resolutions from SD up to 1080p. An SDI loop-through output with equalization and reclocking allows the unit to double as an SDI signal repeater on the same cable run. Discrete analog and digital audio outputs provide flexibility for distributing the embedded SDI audio separate from the HDMI data stream.
Product Description

The 1T-VS-647 is built for broadcast and AV hybrid environments where SDI signals must interface with HDMI equipment. It handles all standard SDI transmission rates, supporting SMPTE 425 A&B, 424M (3G-SDI), 292M (HD-SDI), and 259M-C (SD-SDI). Automatic input video format detection identifies the incoming SDI signal without manual configuration, and SMPTE 425M Level B to Level A conversion is performed automatically. The scaling engine converts SDI timing to PC timing parameters, ensuring clean sync when driving computer monitors or HDMI displays. The SDI loop-through output includes equalization and reclocking, which regenerates signal integrity on the loop path — making the 1T-VS-647 function as an SDI repeater without requiring a separate device. Audio handling is a notable strength: the unit extracts audio embedded in the SDI signal and outputs it to both analog (stereo) and digital connectors, independent of the HDMI output stream. This allows audio to be routed separately to a mixer or amplifier without breaking the video chain. An on-screen menu display simplifies setup and configuration in the field.
Key Features
- 3G/HD/SD-SDI to HDMI Conversion — Converts all major SDI formats to HDMI output for display on consumer and professional monitors.
- SDI Loop-Through with Reclocking — Provides an equalized, reclocked SDI output that extends signal reach and acts as a signal repeater.
- Up to 2.970 Gb/s Processing — Handles 3G-SDI at full data rate, supporting resolutions through 1080p.
- SMPTE 425M Level B to Level A Conversion — Automatically converts dual-link Level B to single-link Level A 3G-SDI format.
- Automatic Input Format Detection — Identifies incoming SDI standard (SD/HD/3G) without manual configuration.
- Discrete Audio Outputs — Extracts SDI-embedded audio to separate analog and digital output connectors.
- SDI-to-PC Timing Conversion — Automatically converts broadcast SDI timing to PC sync parameters for HDMI display compatibility.
- On-Screen Display Menu — Accessible configuration interface for resolution selection and signal parameter adjustment.
Typical Applications
- Broadcast studios feeding SDI camera or router outputs to HDMI production monitors
- Live event production converting SDI program feeds to HDMI projection displays
- Sports venue video systems bridging SDI infrastructure with HDMI scoreboard displays
- Broadcast control rooms monitoring SDI signals on HDMI desktop displays
- Outside broadcast (OB) trucks requiring compact SDI-to-HDMI conversion with audio break-out
- Government and security facilities with SDI camera systems connecting to HDMI video walls
Technical Specifications
| Specification | Value |
|---|---|
| Model | 1T-VS-647 |
| Input | 3G-SDI / HD-SDI / SD-SDI (BNC) |
| SDI Loop-Through Output | Yes (equalized, reclocked) |
| Video Output | HDMI |
| Maximum Bit Rate | 2.970 Gb/s |
| SMPTE Standards | 425 A&B, 424M, 292M, 259M-C |
| SMPTE 425M Level Conversion | Level B to Level A (automatic) |
| Input Format Detection | Automatic (SD/HD/3G) |
| Audio Outputs | Analog stereo, Digital (coaxial) |
| Configuration Interface | On-Screen Display (OSD) menu |
Frequently Asked Questions
What SDI standards does the 1T-VS-647 support?
The unit supports SMPTE 425 A&B (3G-SDI), 424M (3G-SDI), 292M (HD-SDI), and 259M-C (SD-SDI), covering all standard SDI transmission formats.
Does the SDI loop-through reclock the signal?
Yes. The loop-through output includes equalization and reclocking, regenerating the SDI signal for further distribution without quality loss.
Can I extract audio from the SDI signal separately?
Yes. The 1T-VS-647 extracts embedded SDI audio and routes it to discrete analog stereo and digital audio output connectors, independent of the HDMI output.
Does it auto-detect the incoming SDI format?
Yes. Automatic input video format detection identifies SD, HD, or 3G-SDI signals without requiring manual configuration.
What is SMPTE 425M Level B to Level A conversion?
Level B is a dual-stream 3G-SDI format used in some broadcast equipment. The 1T-VS-647 automatically converts Level B to the more widely supported Level A format for downstream compatibility.
Can this unit be used as a standalone SDI repeater?
Yes. The reclocked SDI loop-through output extends signal reach on the SDI path, effectively functioning as a repeater without needing a separate device.
At Creartion Networks, we do everything we can to create an excellent customer experience. This includes fast shipping and easy returns.
- Most in-stock orders placed Monday-Friday ship within 24-48 hours. General restrictions apply; please see our full shipping policy here.
- We offer a 30-day return policy from the delivery date on many products. Product restrictions apply. Restocking fees for the return of open-box items. Please see our full return policy here for more information.
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