Antelope Audio OCX-HD 768 kHz HD Master Clock

Antelope Audio OCX-HD 768 kHz HD Master Clock

The OCX-HD sits elegantly in a single 1U rack space, delivering the master clock stability that has made Antelope Audio's OCX line legendary across mastering, recording, film scoring, and live sound environments for over a decade. Its compact footprint—just 482.6 mm wide and 44 mm tall—fits seamlessly into any technical setup while maintaining the precision and connectivity that professional studios demand.

Clocking Performance & Accuracy

Built on 4th-generation Acoustically Focused Clocking (AFC) technology paired with a 64-bit DDS engine and oven-controlled crystal oscillator, the OCX-HD delivers clock calibration better than ±0.001 ppm with stability locked at ±0.02 ppm. This level of precision ensures rock-solid sync across your entire signal chain, eliminating jitter-induced artifacts that degrade audio fidelity in critical listening and mastering applications.

Connectivity & Flexibility

The OCX-HD provides exceptional routing flexibility with 10 Word Clock outputs (up to 768 kHz), 4 AES/EBU outputs (up to 192 kHz), and 2 S/PDIF outputs (up to 192 kHz), making it the most versatile master clock available. Comprehensive input options—including 2 Word Clock inputs, video sync input for SD/HD formats, atomic clock input, 2 S/PDIF inputs, and 1 AES/EBU input—enable integration with virtually any studio ecosystem and external reference source.

Key Features

• Sample rate generation: 32, 44.1, 48, 88.2, 96, 176.4, 192, 352.8, 384, 705.6, 768 kHz
• 10 Word Clock outputs up to 768 kHz on BNC connectors
• 4 AES/EBU outputs (up to 192 kHz) for DAW and mastering console integration
• 2 S/PDIF outputs (up to 192 kHz) for consumer and semi-pro gear
• 2 Word Clock inputs (up to 768 kHz) for external reference sync
• Universal video input accepting SD and HD formats with pull-up/pull-down rates
• Atomic clock input (10 MHz) for calibration via Antelope's 10MX atomic reference
• 4th-generation Acoustically Focused Clocking with 64-bit DDS and oven-controlled oscillator
• Clock accuracy < ±0.001 ppm with stability < ±0.02 ppm at 64.5°C
• Compact 1U form factor: 482.6 mm W × 230 mm D × 44 mm H; 2.65 kg
• Universal AC power supply (95–245V); maximum 20 watts consumption
• 3 recallable presets with Rate Lock protection for live session stability

The OCX-HD represents the evolution of master clock technology, combining Antelope's proven jitter management with modern sample rate support and comprehensive connectivity—essential architecture for any facility where timing precision directly impacts audio quality.