Marshall Amplification VDA-108-3GS User manual

Broadcast A/V Division
VDA-108-3GS
1x8 3G/HD/SD-SDI Re-Clocking
Distribution Amplifier
User Manual

VDA-108-3GS Manual
www.marshall-usa.com2 1
Table of Contents
1. Introduction
2. Features
3. Package Contents
4. Specifications
5. Panel Descriptions
6. Hardware Installation
7. Connection Diagram
Safety Instructions
02
02
02
03
04
05
05
01
Safety Instructions
The VDA-108 -3GS 1x8 3G/HD/SD-SDI Re-clocking Distribution Amplifier has been tested for
conformance to safety regulations and requirements and has been certified for international use.
However, like all electronic equipment, the VDA-108-3GS should be used with care. Please read
and follow the safety instructions to protect yourself from possible injury and to minimize the risk
of damage to the unit.
• Follow all instructions and warnings marked on this unit.
• Do not attempt to service this unit yourself, except where explained in this manual.
• Provide proper ventilation and air circulation and do not use near water.
• Keep objects that might damage the device and assure that the placement of this unit is on a
stable surface.
• Use only the power adapter and power cords and connection cables designed for this unit.
• Do not use liquid or aerosol cleaners to clean this unit. Always unplug the power to the device
before cleaning.

VDA-108-3GS Manual
www.marshall-usa.com2 3
1. Introduction
2. Features
The VDA-108 -3GS receives one SDI input, perfectly duplicates it, and re-transmits eight SDI outputs
for real time multi-viewing. It is a reliable video device splitting a SDI, HD-SDI, or 3G-SDI video
source to eight SDI compliant displays at the same time. Besides, built-in re-clocking & equalization
features provide the best performance for SDI distribution amplifier.
• 3G/HD/SD triple-rate distribution
• Eight separately buffered and re-clocked outputs
• Supported SDI format
»3G-SDI (SMPTE 424M, 425M level A, B up to 2.97 Gbps)
»HD-SDI (SMPTE 292M, 296M up to 1.485 Gbps)
»SD-SDI (SMPTE 259M, up to 270 Mbps)
• Cable equalization (Belden 1694A) and signal retiming
• Video bandwidth: 2.97Gbps, 2.97/1.001Gbps
• Automatic detection of 3G/HD/SD-SDI signals
• Dual color LED indication of input lock and rate
• Passes all ancillary data
• Provides automatic cable equalization
»[3G]* >120m (400ft)
»[HD] >200m (667ft)
»[SD] >300m (1000ft)
• Re-clocks SDI signals for cascading and thus longer transmission
• Inter-locked power supply for better fixedness
Note: The cable length depends on the characteristics and quality of the cables.
3. Package Contents
• 1x VDA-108-3GS
• 1x 5V power adapter
• 1x User Manual
4. Specifications
Model Name VDA-108-3GS
Technical
SDI standards SD/HD/3G-SDI
Auto 3G/HD/SD detection Yes
Supported protocols SMPTE 259M, SMPTE 292M, SMPTE 424M, SMPTE425M
Video bandwidth [2.97Gpbs & 2.97/1.001Gbps]
Data rates 270 / 1483 / 1485 / 2970 Mbps
Output impedance 75
Re-clocking function Yes
Cable equalization [3G-SDI] >120m (394ft) / [HD-SDI] >200m (656ft) / [SD-SDI] >300m (984ft)
Audio support Yes
RP-198 pathological patterns Immune
PCB stack-up 4-layer board [impedance control — differential 100 ; single 50 ]
Input 1x BNC [SDI]
Output 4x BNC [SDI]
BNC connector 75 inter-locked socket
Eye pattern characteristics
[HD]
Amplitude: Within 800mV ±3% (<10%) Long time jitter: 0.195 UI (<1.0 UI)
Rise overshoot: Less than 2% (<10%) Timing jitter: 0.195 UI (<1.0 UI)
Fall overshoot: Less than 2% (<10%) Alignment jitter: 0.127 UI (<0.2 UI)
Mechanincal
Housing Metal enclosure
Dimensions
[L x W x H]
Model 120.5 x 41.4 x 24.2mm [4.7” x 1.6” x1”]
Package 175 x 128 x 134mm [6.9" x5" x5.3"]
Carton 662 x 366 x 290mm [2'2" x 1'2" x 1']
Weight
Model 259g [0.6 lbs]
Package 525g [1.2 lbs]
Fixedness Inter-locked power supply
Power supply 5V 2A DC
Power consumption 1.3 Watts [max]
Operation temperature 0~40°C [32~104°F]
Storage temperature -20~60°C [-4~140°F]
Relative humidity 20~90% RH [no condensation]
Note: The measurement results are from Tektronix WFM-7120 with SDI through 1m (3.3ft) long
Belden 1694A

VDA-108-3GS Manual
www.marshall-usa.com4 5
5. Panel Descriptions
1 2 3 4 5
7 8 9 10 11 12 13 14
6
1. 3G/HD/SD-SDI Output
2. 3G/HD/SD-SDI Output
3. 3G/HD/SD-SDI Output
4. 3G/HD/SD-SDI Output
5. 5V DC power jack
Front Panel
Rear Panel
6. Power LED indicator
7. 3G/HD/SD-SDI Input
8. 3G Signal LED indicator
9. HD Signal LED indicator
10. SD Signal LED indicator
11. 3G/HD/SD-SDI Output
12. 3G/HD/SD-SDI Output
13. 3G/HD/SD-SDI Output
14. 3G/HD/SD-SDI Output
7. Connection Diagram
6. Hardware Installation
Camera
Display with COAXIAL input
1. Connect a camera or other devices equipped with 3G/HD/SD-SDI outputs to VDA-108-3GS 3G/
HD/SD-SDI input.
2. Connect devices equipped with 3G/HD/SD-SDI inputs (e.g. monitors or video processors) to
VDA-108-3GS 3G/HD/SD-SDI outputs.
3. Plug power adapter cable into 5V DC power jack.

20608 Madrona Avenue, Torrance, CA 90503
Tel: [phone] • Fax: [phone]
www.marshall-usa.com
[e-mail]
Marshall Electronics warranties to the first consumer that this device will, under normal use,
be free from defects in workmanship and materials, when received in its original container, for
a period of two years from the purchase date. This warranty is extended to the first consumer
only, and proof of purchase is necessary to honor the warranty. If there is no proof of purchase
provided with a warranty claim, Marshall Electronics reserves the right not to honor the warranty
set forth above. Therefore, labor and parts may be charged to the consumer. This warranty
does not apply to the product exterior or cosmetics. Misuse, abnormal handling, alterations or
modifications in design or construction void this warranty. No sales personnel of the seller or
any other person is authorized to make any warranties other than those described above, or to
extend the duration of any warranties on behalf of Marshall Electronics, beyond the time period
described above.
Due to constant effort to improve products and product features, specifications may change
without notice.
Warranty
V.1.0