Tascam CG-1800 – Video Sync/Master Clock Generator

The CG-1800 from Tascam is specifically designed for small to large-scale video/audio synchronization systems. An OCXO (oven-controlled crystal oscillator) is used for its high precision and because it’s not affected by the temperature of the environment. With a clock frequency precision of 0.01 ppm the unit delivers high-precision synchronization with a frequency stability of +/-0.005 ppm or less per day.

External clock jitter is reduced using an original circuit design that incorporates a high-performance video clock generator engineered with a FPGA and a PLL (phase-locked loop) circuit with a discrete filter. This enables a stable clock signal to be provided to the video/word outputs, improving system stability.

Features

• Internal clock uses a high-precision OCXO (oven-controlled crystal oscillator) that is not influenced by the temperature of the environment
• External input connector that supports 10 MHz, allowing creation of systems with even higher precision
• Glitch-free relocking circuit prevents noise and skipping during clock dropouts and recovery
• Numerous output connectors, including twelve Wordclock outputs, enabling the use in large-scale audio synchronization systems
• Supports input and output of a variety of video signal formats, including NTSC, PAL and HD Tri-level
• AES3 and AES11 signals can also be used for external master clock input sources
• Analyzer function that can measure output device termination
• Optimal levels can be provided to other devices by adjusting Wordclock output levels
• Self-calibration function using an external oscillator (Atomic/GPS 10MHz, GPS PPS) (requires a separate PPS-output 10 MHz oscillator with a built-in GPS antenna)
• Wordclock performance up to 192 kHz
• 0.1% pull-up/down for 24F (Film) and 29.97F (NTSC), and 4% pull-up/down for 24F (Film) and 25F (PAL)
• Up to four system settings can be saved to buttons for recall, and saved settings can be imported and exported via USB
• Durable Amphenol manufactured nut-coupling BNC connectors
• Independent circuit boards for each connector prevents contact failures due to twisting
• Panel-lock switch can be used to prevent inadvertent changes to unit operation
• 128 x 64-pixel organic EL display with a wide viewing angle
• Firmware updates possible using the USB port
• 1U rackmount
• RoHS-compliant

Specifications