Tascam CG-1800 Master Clock Generator for Post-Production
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The CG Series includes three distinct models tailored to different types of studios. The CG-2000 is designed for the needs of broadcasting and post production, the CG-1800 for small to large-scale video/audio synchronization systems, and the CG-1000 for recording studios, live sound applications and professional musicians.
The crystal oscillator is the heart of the clock generator. In each model of the CG Series, 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*1, 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.
The CG-2000 is equipped with an external input connector that supports a 10MHz signal. This allows it to be connected to a rubidium clock or GPS clock for even higher precision.
External clock jitter is reduced using an original TASCAM circuit design that incorporates a high-performance video clock generator engineered with a FPGA*2 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. The glitch-free relock circuit prevents noise and skipping sounds caused by master clock dropouts.
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.
The CG Series has multiple functions to support maintenance, and the identification of issues if problems occur. The analyzer function measures output device termination, input level measurement (for CG-2000 and CG-1800), 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.
Since crystal oscillators change over time, regular calibration is necessary. In order to avoid possible sync problems, timely inspections along with regular maintenance is required. The CG Series has a self-correction function, enabling users to conduct maintenance using an external signal input*3 and simple operations.
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.
SPECS
Inputs:
VIDEO INPUTS
Connector: BNC
Input level: 0.5Vp-p to 2.0Vp-p
Input impedance: 75ohm (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
Connector: BNC
Input level: 0.5Vp-p to 5.0Vp-p
Input impedance: 75ohm/50ohm(75/50/OFF selectable by menu)
Supported frequencies:
WORD CLOCK: 32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz
ATOM: 10.0 MHz
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: 110ohm
Format: AES11-2003, AES3-2003, IEC60958-4
Supported frequencies: 32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz
Allowable frequency deviation: +/-50ppm
CALIBLATION INPUT
Connector: BNC
Input level: 0.5 to 5.0 Vp-p
Input impedance: 50ohm(ON/OFF selectable by menu)
Supported frequencies
ATOM: 10.0 MHz
GPS: 10.0MHz, PPS
VIDEO OUTPUTS
Connector: BNC4(1-4)
Output level: 1.3Vp-p
Output impedance: 75ohm
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: BNC12(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)
AES3/11 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 (W x H x D): 483 x 45 x 310 mm
Weight: 3.2kg
Operating temperature range: 0 degC to 40 degC
Included accessories: Power cords, rackmounting screw kit, operation manual (with warranty)
Q & A
Reviews
Protect your investment with the Long & McQuade Performance Warranty
A warranty can be a very important factor when making a buying decision. Because repairs can be very expensive in terms of parts and labour costs, manufacturers usually only provide one year limited warranties that generally only cover items that malfunction due to a manufacturer’s defect. With an important purchase such as a musical
instrument or piece of studio gear, however, many people want to have the peace of mind in knowing that their investment will be protected should the product no longer be performing at 100%.
Because of this, Long & McQuade provides our customers with a FREE one-year Performance Warranty on most of our products. The Long & McQuade Performance Warranty supplements the manufacturer’s warranty to ensure that our customers receive complete “no hassle” warranty coverage within their first year.
How does the Long & McQuade Performance Warranty differ from most manufacturers' warranties?
- Performance Guarantee: Normal wear and tear is covered, so your product will be performing as well as the day you purchased it for the entire duration of the coverage. Band and Orchestral Performance Warranty does not include replacing pads or cleaning for woodwind instruments, unless deemed necessary by our repair staff. Ultrasonic cleaning for brass instruments will be provided if deemed necessary by our repair staff, but is not routinely offered under the Performance Warranty.
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Purchasing additional years of coverage
Some manufacturers provide warranties for longer than 1 year; however, these are usually limited warranties that do not provide the same coverage as the Long & McQuade Performance Warranty. Customers interested in more complete and convenient (but not necessarily longer) coverage are still able to purchase additional years of the Performance Warranty.
If you are interested in receiving this coverage for longer than one year, you have the option of purchasing additional years of the Performance Warranty. The pricing is as follows:
- NEW products: 4% of the current new selling price to double the warranty from 1 year to 2 years. 4% for each additional year.
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| Product | SKU | Qty |
|---|---|---|
| CG-1800 Master Clock Generator for Post-Production | 477413 |
