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Tascam CG-1800

Tascam CG-1800
         
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Master Clock w/Video Out

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 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 input frequencies
  • 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)
  • Word clock performance up to 192 kHz
  • 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
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Sale: $1,632.00
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Product Information

Video/sync master clock generator for post-production

Tascam_CG-1800The Tascam CG-1800 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 to ensure compatibility with any synchronization system. The CG-1800 is designed for the needs of small to large-scale video/audio 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 this unit useful for large-scale audio/video synchronization systems, and a wide variety of other applications. Of the (12) word outputs, two also support x2Fs, x4Fs and 256Fs output - enabling them to be used in systems with ProTools and other DAW software.
 

Tascam_OCXOInternal clock uses a high-precision OCXO that is not influenced by the temperature of the environment

The Tascam CG-1800 has a crystal oscillator which 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.

Tascam_word_ext_in

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.

Tascam_jitter_mngtJitter management circuit provides stable clock

The CG-1800 has an external clock jitter is reduced using an original TASCAM circuit design that incorporates 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 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.

Analyzer function that can measure input frequencies

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.

cg-2000_w_rogChecking conditions if problems occur is possible through logging

The CG-1800 has multiple functions to support maintenance, and the identification of issues if problems occur. The analyzer function measures output device termination, input level measurement and the measurement of input frequencies. These built-in features enable the devices to provide troubleshooting support. Additionally, a logging function enables issues to be listed, and saved to a CSV file format 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. The use of the self-calibration function requires preparation of a separate PPS-output 10MHz oscillator with a built-in GPS antenna.

Durable nut-coupling Amphenol BNC connectors

Amphenol BNC connectors on the chassis use nuts for coupling – making them very durable; also, a single circuit board is used for each connector - providing excellent resistance to the twisting and pulling of cables, and the suppression of interference between connectors.

Each connector has an independent circuit board

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.


 

What's In The Box

  • 2 x Power cords
  • Rackmounting screw kit
  • Operational manual (with warranty)

Specifications

Model: CG-1800 Specifications
Description Master clock generator
Video Inputs
Connector BNC
Input level 0.5Vp-p to 2.0Vp-p
Input impedance 75ohm (ON/OFF selectable by menu)
SD video black burst NTSC(29.97), NTSC B/W(30), PAL(25)
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
Connector BNC×2(A/B)
Input level 0.5Vp-p to 5.0Vp-p
Input impedance 75ohm/50ohm(75/50/OFF selectable by menu)
WORD CLOCK 32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz
ATOM 10.0 MHz
GPS 10.0MHz
Allowable frequency deviation +/-50ppm
AES3/AES11 Input
onnector XLR-3-31(1:GND, 2:HOT, 3:COLD)
Input level 0.2Vp-p to 10Vp-p
Input impedance 110ohm
Format AES11-2003, AES3-2003, IEC60958-4
Supported frequencies 32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz
Allowable frequency deviation +/-50ppm
Calibration Input
Connector BNC
Input level 0.5 to 5.0 Vp-p
Input impedance 50ohm(ON/OFF selectable by menu)
ATOM 10.0 MHz
GPS 10.0MHz, PPS
Video Outputs
Connector BNC×4(1-4)
Output level 1.3Vp-p
Output impedance 75ohm
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 75ohm
Supported frequencies 32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz 1/4xFs, 1/2xFs, 1xFs, 2xFs, 4xFs, 256xFs (Only OUTPUTS 11-12)
AES3/AES11 Outputs
Connector XLR-3-31(1:GND, 2:HOT, 3:COLD)×2(1-2)
Output level 2.5Vp-p
Output impedance 110ohm
Format AES11-2003, AES3-2003, IEC60958-4
Supported frequencies 32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz
S/PDIF OUTPUTS
Connector RCA pin jacks ×2(1-2)
Output level 0.5Vp-p
Output impedance 75ohm
Format IEC60958-3
USB A data transfer use by a USB flash drive
Connector 4-pin type B
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 AC100V to 240V, 50/60Hz
Power consumption 11.5W
Dimensions 483(W)×45(H)×310(D)mm
Weight 3.2kg
Operating temperature range 0˚C to 40˚C
Included accessories Power cords×2, rackmounting screw kit, operation manual (with warranty)

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