1. Product Descripin
The HZT‑SDI-12G-4VV‑SM2CAS is a broadcast‑grade 4‑channel bi‑directional SDI‑to‑fiber conversion platform built for uncompressed UHD video transport. It supports simultaneous bi‑directional transmission of 3G‑SDI and 12G‑SDI signals over single‑mode fiber, featuring hardware‑based cascading ports for flexible system expansion without extra multiplexer hardware.
Designed for both fixed installation and temporary field deployment, this converter delivers zero‑compression, near‑zero‑latency video transmission. Each unit handles four independent bidirectional SDI streams, and multiple units can be daisy‑chained via dedicated cascading interfaces to scale total signal capacity. It adopts plug‑and‑play architecture; no host software or complex configuration is required for basic operation, lowering on‑site setup workload for system integrators and production crews.
The system supports mixed‑rate SDI workflows, allowing 12G‑SDI, 3G‑SDI, HD‑SDI and SD‑SDI streams to co‑exist within the same fiber link. Robust electromagnetic immunity from fiber transmission avoids coaxial‑cable‑related interference issues in large‑scale live‑production environments.
2. Key Features
- ‑Channel Fully Bi‑directional SDI Transport：Four independent 75Ω BNC ports, each configurable for transmit or receive direction; supports mixed 12G‑SDI / 3G‑SDI / HD‑SDI / SD‑SDI signal flows in both directions.
- Hardware‑Driven Cascading Expansion：Dedicated cascading I/O ports support daisy‑chaining multiple converter units. Expand aggregate SDI channel count by stacking devices, enabling distributed signal routing across a single fiber pair. System capacity can grow incrementally according to project scale without replacing existing hardware.
- Uncompressed Near‑Zero‑Latency Transmission：No video compression; hardware re‑clocking ensures minimal signal latency, compliant with live‑broadcast timing requirements. Embedded audio and ancillary SDI metadata pass through transparently without alteration.
- Auto‑Rate Detection & Signal Re‑clocking：Automatically detects incoming SDI bit‑rates from 270 Mbps up to 11.88 Gbps; built‑in output re‑clocking improves signal integrity for long‑haul BNC cabling.
- Broad SDI Standards Compatibility：Supports SMPTE ST‑2082 (12G‑SDI), ST‑2081 (6G‑SDI), ST‑424M (3G‑SDI), ST‑292M (HD‑SDI), ST‑259M (SD‑SDI), as well as DVB‑ASI transport streams.
- Robust Aluminum Enclosure：Compact rack‑mountable / desktop‑capable chassis with good heat dissipation, suitable for OB‑van, venue and control‑room environments.
- Plug‑and‑Play Deployment：No driver or PC software mandatory for normal signal conversion; direction settings can be adjusted via DIP switches on unit side panel.
3. Typical Applications
- Live broadcast & OB‑van production：Sports events, concerts and large‑scale live shows for multi‑camera UHD signal extension and return feed delivery.
- Television studio signal routing：Inter‑room SDI signal transport between studio floor, control room and master‑control areas.
- House‑of‑worship & large venue AV systems：Multi‑camera video distribution for auditoriums, conference centers and performance venues.
- Temporary event production：Festivals, exhibitions and outdoor live production where signal count needs frequent re‑configuration and expansion.
- Command‑and‑control & media monitoring：Multi‑source UHD video aggregation over fiber for monitoring walls and dispatch centers.
- Post‑production facilities：Lossless long‑distance SDI signal sharing between editing and grading workstations.
