Tascam CG-1800

Abundant Input and Output Connectors Support Use in Large-scale Audio/Video Synchronization Systems Numerous output connectors, including 12 word clock outputs In addition to 12 word clock outputs and 4 video outputs, the digital outputs include 2 AES3/AES11 and 2 S/PDIF outputs, making the CG-1800 useful for large-scale audio/video synchronization systems, and a wide variety of other applications. Of the 12 word outputs, two also support 2×Fs, 4×Fs and 256×Fs output – enabling them to be used in systems with ProTools and other DAW software. Supports input and output of a variety of video signal formats – including NTSC, PAL and HD Tri-level High-precision synchronization systems can be created Internal clock uses a high-precision OCXO that is not influenced by the temperature of the environment The crystal oscillator is the heart of the clock generator, In the CG-1800, an OCXO (oven-controlled crystal oscillator) is used for its high precision, and the fact it is not influenced by the temperature of the environment. Boasting a clock frequency precision of 0.01 ppm*, which exceeds that of a TCXO (temperature-compensated crystal oscillator), this unit is key in the creation of high-precision synchronization systems – with word output frequency stability of +/-0.005ppm or less per day. *factory default value. Input connector that supports 10MHz signal – allowing the creation of systems with even higher precision An external input connector that supports a 10MHz signal enables the CG-1800 to be connected to a rubidium clock or GPS clock for even higher precision. Designed for High Reliability and Dependable Stability Jitter management circuit provides stable clock External clock jitter is reduced using an original TASCAM circuit design that incorporates a high-performance video clock generator device, featuring an FPGA (Field Programmable Gate Array) 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. Glitch-free relocking circuit prevents noise and skipping during clock dropouts and recovery The CG-1800 constantly measures the external reference clock. In devices that do not have built-in countermeasures, and the master clock signal drops out, the video reference and word clock signals could become out of phase, and sound might skip during the dropout – and again during recovery. In the CG-1800, if the clock drops out, a substitute reference clock signal is maintained with a high-performance holdover. During this time, the video reference and word clock signals are kept in-phase, so restoration of synchronization to the reference signal can occur without glitches – preventing video/audio noise and skipping sounds when recovering from a dropout. Multiple Functions Support Maintenance and Identification of Issues If Problems Occur Analyzer function that can measure output device termination In the installation of broadcasting and large-scale post-production studios, numerous connected devices and complicated wiring are common. The CG-1800 has an analyzer function that allows it to measure input frequencies, input levels and the terminations of output devices – enabling it to provide support when troubleshooting problems should they occur. Optimal levels can be provided to other devices by adjusting wordclock output levels Depending on the routing of wiring and the receiving devices, signal levels could be reduced – resulting in proper reception failures. Since the output of the CG-1800 can be set to multiple levels, it can provide optimal signal levels to connected devices. Checking conditions if problems occur is possible through logging One function that enables identification of the causes of trouble is the logging function. In addition to being able to check the log on the CG-1800 display, you can also capture the log as a CSV-format file on a USB flash drive. Self-calibration function enables maintenance by users Since crystal oscillators change over time, regular calibration is necessary. In order to avoid problems that could lead to broadcast trouble, timely inspections and regular maintenance are required. The CG-1800 has a self-correction function, enabling users to conduct maintenance using external signal input* and simple operations. *Use of the self-calibration function requires preparation of a separate PPS-output 10MHz oscillator with a built-in GPS antenna. Designed for Durability Durable nut-coupling Amphenol BNC connectors Since the Amphenol BNC connectors use nuts for coupling, they are extremely resistant to pulling, twisting and multiple connect-disconnect cycles. Each connector has an independent circuit board to prevent contact failures due to twisting and repeated use The construction uses a single circuit board for each connector. This provides excellent resistance to the twisting and pulling of cables and suppresses interference between connectors.