Blackmagic Design Spares - Camera URSA EVF - SDI/Power Cable
This spare part is a specialized "Y-cable" assembly designed specifically for the Blackmagic URSA Viewfinder. It provides the essential bridge between the camera body and the EVF, carrying both the 3G-SDI video signal and the 12V power required to drive the high-brightness OLED display.
Cable Architecture
The cable is designed as a single unit to reduce clutter and prevent the accidental tangling often associated with using separate SDI and XLR cables.
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Camera End: Features a standard 3G-SDI BNC connector for video and a 4-pin XLR (Male) for power. These plug directly into the Viewfinder ports at the rear of the URSA or URSA Mini body.
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EVF End: Features a high-density, multi-pin circular connector (frequently a specialized LEMO or Hirose-style variant in spare parts terminology) that provides a secure, locking connection to the Viewfinder chassis.
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Strain Relief: The cable includes molded strain relief at all junction points to prevent internal wire breakage during the constant tilting and extending of the viewfinder mount.
Technical Compatibility
This spare part is intended for the original URSA Viewfinder (used on URSA, URSA Mini, URSA Mini Pro, and URSA Broadcast models).
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Video Standard: Supports uncompressed 3G-SDI, ensuring the 1920 x 1080 resolution of the OLED screen is fully utilized without latency.
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Power Delivery: Rated for standard 12V DC operation, pulling power directly from the camera’s accessory port.
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Metadata Support: The cable maintains the data path for camera metadata, allowing the EVF to display technical information like shutter angle, ISO, and battery percentage.
Replacement Indicators
This specific cable assembly is the primary "wear item" for the URSA Viewfinder system. You should consider this spare part if:
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Intermittent Signal: The EVF image flickers or "snows" when the viewfinder is tilted or moved.
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Power Loss: The OLED screen fails to turn on, or the internal proximity sensor (which turns off the screen when your eye isn't present) becomes unresponsive.
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Physical Damage: The braided outer jacket is frayed, or the BNC/XLR pins have become bent or recessed due to frequent rigging changes.
Installation Insight
Replacing the cable usually requires a small precision screwdriver (typically a Philips #00 or a small Hex key) to remove the small retention plate at the base of the EVF. Once the plate is removed, the old cable can be unplugged and the new spare threaded through the viewfinder mount.
Note: This cable is distinct from the newer URSA Cine EVF Cable Set, which utilizes a proprietary USB-C locking connector for the latest generation of URSA Cine cameras. Ensure your viewfinder uses the traditional BNC and 4-pin XLR connections before ordering this specific spare part.
