Tascam CG-1800 Video Sync/Master Clock Generator

The Tascam CG-1800 Video Sync/Master Clock Generator generates NTSC, PAL and HD Tri-level video clock – as well as word clock through BNC, AES/EBU and S/PDIF outputs – ensuring compatibility with any synchronization system. It is ideal for small to large-scale video/audio synchronization systems.

The Tascam CG-1800 Video Sync/Master Clock Generator's internal clock employs the high-precision OCXO that is not impacted by environment temperature. All models use a high-precision OCXO (oven-controlled crystal oscillator) that boasts a clock frequency precision of ±0.01ppm and a frequency stability of ±0.005ppm per day. The jitter management circuit developed by TASCAM reduces external clock jitters, enabling a stable clock signal to video and word outputs, while a glitch-free relock circuit maintains a sustained clock phase even during clock dropouts and recovery, thus effectively preventing noise and skipping from occurring, delivering high reliability and stability to users.

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 Tascam 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 Tascam 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.

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.

Tascam CG-1800 Video Sync/Master Clock Generator 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 10MHz, allowing creation of systems with even higher precision
• Jitter management circuit provides stable clock
• Glitch-free relocking circuit prevents noise and skipping during clock dropouts and recovery
• Numerous output connectors, including (12) word clock outputs, enabling the use in large-scale video/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)
• Use of the self-calibration function requires the use of a separate PPS-output 10MHz oscillator with a built-in GPS antenna.
• Word clock 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 (4) system settings can be saved to buttons for recall, and saved settings can be imported and exported via USB
• Durable nut-coupling BNC connectors made by Amphenol
• Independent circuit boards for each connector prevents contact failures due to twisting
• Three-prong IEC power cable included
• Panel-lock switch can be used to prevent inadvertent changes to unit operation
• 128x64-pixel organic EL display with a wide viewing angle
• Firmware updates possible using the USB port
• EIA 1U rack mount size
• RoHS-compliant product

Tascam CG-1800 Video Sync/Master Clock Generator Specifications

• INPUTS:
  • VIDEO INPUTS:
    • Input Type:
      • Connector: BNC
      • Input level: 0.5Vp-p to 2.0Vp-p
      • Input Impedance: 75O (ON/OFF Selectable by Menu)
    • Input Signal:
      • SD Video Black Burst: NTSC (29.97), NTSC B/W (30), PAL (25)
    • HD Video Tri-Level:
      • 720p: 50, 59.97, 60
      • 1080p: 23.976, 24, 25, 29.97, 30, 59.94, 60
      • 1080i/PSF: 23.976, 24, 25, 29.97, 30
      • Allowable Frequency Deviation: ±10ppm
  • WORD/EXT INPUTS:
    • Type:
      • Connector: BNC
      • Input Level: 0.5Vp-p to 5.0Vp-p
      • Input Impedance: 75O/50O (75/50/OFF Selectable by Menu)
    • Supported Frequencies:
      • WORD CLOCK: 32k / 44.1k / 48k / 88.2k / 96k / 176.4k / 192k Hz
      • ATOM: 10.0MHz
      • GPS: 10.0MHz
    • Allowable Frequency Deviation: ±50ppm
  • AES3/11 INPUT:
    • Connector: XLR-3-31(1: GND, 2: HOT, 3: COLD)
    • Input Level: 0.2Vp-p to 10Vp-p
    • Input Impedance: 110O
    • Format: AES11-2003, AES3-2003, IEC60958-4
    • Supported Frequencies: 32k / 44.1k / 48k / 88.2k / 96k / 76.4k / 92k Hz
    • Allowable Frequency Deviation: ±50ppm
  • CALIBLATION INPUT:
    • Connector: BNC
    • Input Level: 0.5 to 5.0 Vp-p
    • Input Impedance: 50O (ON/OFF Selectable by Menu)
    • Supported Frequencies: ATOM (10.0MHz), GPS (10.0MHz, PPS)
• OUTPUTS:
  • VIDEO OUTPUTS:
    • Type:
      • Connector: BNC × 4 (1-4)
      • Output Impedance: 75O
    • Output Signal:
      • SD Video Black Burst: NTSC (29.97), NTSC B/W (30), PAL (25)
    • HD Video Tri-Level:
      • 720p: 50, 59.97, 60
      • 1080p: 23.976, 24, 25, 29.97, 30, 50, 59.94, 60
      • 1080i/psf: 23.976, 24, 25, 29.97, 30
  • WORD OUTPUTS:
    • Connector: BNC × 12 (1-12)
    • Output Level: 1.0Vp-p to 3.5Vp-p (Adjustable in 0.5V Steps by Menu)
    • Output Impedance: 75O
    • Supported Frequencies: 32k / 44.1k / 48k / 88.2k / 96k / 176.4k / 192k Hz
    • ¼×Fs, ½×Fs, 1×Fs, 2×Fs, 4×Fs, 256×Fs (Only OUTPUTS 11-12)
  • AES3/11 OUTPUTS:
    • Connector: XLR-3-31 (1: GND, 2: HOT, 3: COLD) × 2 (1-2)
    • Output Level: 2.5Vp-p
    • Output Impedance: 110O
    • Format: AES11-2003, AES3-2003, IEC60958-4
    • Supported Frequencies: 32k / 44.1k / 48k / 88.2k / 96k / 176.4k / 192k Hz
  • S/PDIF OUTPUTS:
    • Connector: RCA Pin Jacks × 2 (1-2)
    • Output Level: 0.5Vp-p
    • Output Impedance: 75O
    • Format: IEC60958-3
• USB:
  • Type: A Data Transfer Use by a USB Flash Drive
  • Connector: USB B-Type
  • Protocol: USB2.0 High Speed (480Mbps)
  • Power Supply Rating: DC5.0V, 0.2A
• Internal Oscillator Performance:
  • Type: OCXO
  • Frequency Accuracy: ±0.01ppm (Factory Default Value)
  • Frequency Stability: ±0.005ppm / day
• Power: AC100 - 240V, 50/60Hz
• Power Consumption: 14W 11.5W 10W
• Dimensions (W×H×D): 483 × 45 × 310 mm
• Weight: 7.1 lbs. / 3.2 Kg
• Operating Temperature Range: 32°F to 104°F / 0°C to 40°C

Tascam CG-1800 Video Sync/Master Clock Generator Includes

• 1 x Tascam CG-1800 Video Sync/Master Clock Generator
• 2 x Power Cords
• 1 x Rackmounting Screw Kit
• 1 x Operation Manual
• 1 Year Warranty