Antelope Audio OCX-HD Isochrone Master Clock

Intuitive and Powerful - The Antelope Audio OCX-HD Isochrone Master Clock

The perfect solution for mastering, recording and project studios, film-scoring, post-production and live sound. For over a decade, Antelope’s legendary OCX Master Clock has been a dominant force in the audio world. The legacy continues.

• 4th-generation AFC jitter management algorithm
• Output of 5 distinct sample rates enabled by onboard multipliers and dividers
• Additional connectivity via 4 AES/EBU, 2 S/PDIF clocking outputs (up to 192 kHz)
• Comprehensive audio gearboxing
• Universal video input (BNC connector)
• Atomic clock input for optimized accuracy and calibration
• 3 recallable presets
• Control panel Rate Lock protects your settings while in session
• User-friendly front panel control

SPECIFICATIONS

• Sample Rates Generated: 32, 44.1, 48, 88.2, 96, 176.4, 192, 352.8, 384, 705.6, 768 kHz
• Master Clock Outputs
• 10 x Word Clock Outputs up to 768 kHz
• 4 x AES/EBU Outputs up to 192 kHz
• 2 x S/PDIF Outputs up to 192 kHz
• Inputs
• 2 x Word Clock Inputs up to 768 kHz
• 1 x Video Input accepting wide range of SD and HD video signals
• 1 x Atomic Input
• 2 x S/PDIF Inputs up to 192 kHz
• 1 x AES/EBU Input up to 192 kHz
• 1 x USB Input for control
• Humidity: 30 – 80% RH non-condensing
• Clocking System
• 4th Generation Acoustically Focused Clocking
• 64-bit DDS
• Oven Controlled Crystal Oscillator
• Clock Calibration: < +/-0.001 ppm
• Clock Stability: <+/- 0.02 ppm, oven controlled at 64.5 C/148.1 F
• Clock Aging: < 1 ppm per year
• Atomic Clock Input: 1 x 10M Atomic Clock Input @ 75 Ohms 3Vpp on BNC
• Sample Rates (KHz): 32, 44.1, 48, 88.2, 96, 176.4, 192, 352.8, 384, 768 kHz
• Operating Temperature: 0 – 50°C, 32-122°F
• Weight: 2.65 kg/5.84 lbs
• Dimensions: 482.6 (W) х 230 (D) х 44 (H) mm, 19 (W) x 9.05 (D) x 1.75 (H) inches
• Power Supply: AC Universal Input ~95-245 V, 20 Watts Max

We are Chuck Levin's Washington Music Center

Since 1958, Chuck Levin’s Washington Music Center has been the trusted destination for musicians and audio professionals across Maryland, Virginia, and Washington, D.C. Family-owned and operated, our legendary music store delivers Everything in Music®—from instruments and recording gear to pro audio, rentals, and repair services.

Our team of musicians and industry experts lives and breathes gear, helping you build the perfect setup for your next performance, studio session, or installation. As an authorized dealer for top brands, we also offer our award-winning CHUCKSCLUSIVE line—exclusive, limited-edition instruments and collaborations recognized with the NAMM Top 100 Dealer Innovation Award for redefining what a music retail experience can be.

Chuck Levin’s isn’t just a store—it’s a community built by players, engineers, and creators who share a lifelong passion for sound. Stop by our legendary Wheaton, MD showroom or contact us anytime for expert advice, product questions, or the best possible deal on your next piece of gear.