Antelope Audio OCX-HD 768 kHz HD Master Clock
Description
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 ensures rock-solid synchronization across mastering, recording, film scoring, and live sound sessions. Its compact footprint—just 482.6 mm wide and 44 mm tall—integrates seamlessly into any studio setup while maintaining the precision and connectivity that professional tracking and mixing 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 eliminates jitter-induced phase distortion that muddies recordings and degrades mix translation, keeping every track locked tight throughout multitrack sessions and mastering work.
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 for complex studio setups. 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 DAWs, interfaces, outboard converters, and external reference sources in virtually any configuration.
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 mastery in clock design, combining Antelope's proven jitter elimination with modern sample rate support and comprehensive connectivity—essential infrastructure for any studio where timing precision directly determines recording and mix quality.
More Information
| Condition | New |
|---|---|
| Country of Manufacture | Bulgaria |
Reviews
At a Glance
The Antelope Audio OCX-HD is a mastering-grade master clock with 4th-generation Acoustically Focused Clocking and 64-bit DDS, supporting sample rates to 768 kHz and offering unprecedented routing flexibility for multitrack recording, mastering console integration, and DAW sync. Home engineers and producers use it to eliminate jitter-induced artifacts that blur mixes, especially at high sample rates and when chaining multiple converters or interfaces. It's the reference standard when your monitoring chain, tracking setup, or mastering workflow demands timing accuracy that directly translates to cleaner, more transparent audio.
Frequently Asked Questions
What sample rates does the OCX-HD support?
The OCX-HD generates and distributes clock signals at 32, 44.1, 48, 88.2, 96, 176.4, 192, 352.8, 384, 705.6, and 768 kHz. Word Clock outputs support all rates up to 768 kHz, while AES/EBU and S/PDIF outputs max out at 192 kHz.
How many output connections does it have, and what types?
The OCX-HD provides 10 Word Clock outputs on BNC connectors, 4 AES/EBU outputs, and 2 S/PDIF outputs, giving you the flexibility to clock multiple interfaces, converters, and mixing consoles simultaneously.
Can it sync to external clock references or video?
Yes. The OCX-HD accepts 2 Word Clock inputs up to 768 kHz, an atomic clock input (10 MHz), a universal video input for SD/HD formats, and 2 S/PDIF inputs, allowing integration with virtually any external sync source or reference standard.
What makes the OCX-HD's clock accuracy special?
It uses 4th-generation Acoustically Focused Clocking with a 64-bit DDS engine and oven-controlled crystal oscillator, achieving calibration accuracy better than ±0.001 ppm and stability locked at ±0.02 ppm—eliminating jitter-induced artifacts in critical listening and mastering applications.
Does it fit standard rack configurations?
Yes. The OCX-HD occupies just 1U of rack space (482.6 mm wide × 44 mm tall × 230 mm deep) and draws a maximum of 20 watts from a universal AC supply, making it compatible with any standard 19-inch rack.
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