Antelope Audio Isochrone OCX, a high-resolution audio master clock in a 1U 19-inch rackmount chassis. It uses an oven-controlled crystal oscillator with Antelope's Jitter Management Module for very low jitter. Supports sample rates from 32 to 192 kHz with front-panel sample rate selectors and a display, eight BNC word clock outputs (outputs 7 and 8 can run at independent rates, including 256x Superclock for Pro Tools systems), two AES/EBU outputs and two S/PDIF outputs. A rear 10 MHz atomic clock input and thru lets it lock to an external atomic reference such as the Isochrone 10M. Oven indicator LED and display contrast control. Fully working, used in a professional studio. Local pickup in Miami, FL; shipping available.