
Nevion Europe
P.O. Box 1020, 3204 Sandefjord, Norway – Tel: +47 33 48 99 99 – Fax: +47 33 48 99 98
www.nevion.com
DA-3GHD-2x4
Multi Rate 3GHD-SDI Distribution Amplifier
User manual
Rev. 0

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Nevion Support
Nevion Europe
P.O. Box 1020
3204 Sandefjord, Norway
Support phone 1: +47 33 48 99 97
Support phone 2: +47 90 60 99 99
Nevion USA
1600 Emerson Avenue
Oxnard, CA 93033, USA
Toll free North America: (866) 515-0811
Outside North America: +1 (805) 247-8560
E-mail: support@nevion.com
See http://www.nevion.com/support/ for service hours for customer support globally.
Revision history
Current revision of this document is the uppermost in the table below.

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Contents
Revision history .......................................................................................................... 2
1 Product overview ..................................................................................................... 4
2 Specifications .......................................................................................................... 6
3 Configuration ........................................................................................................... 7
3.1 Configuration Examples................................................................................................... 8
4 Connections ............................................................................................................. 9
5 Operation ............................................................................................................... 11
General environmental requirements for Nevion equipment..................................... 13
Product Warranty ...................................................................................................... 14
Appendix A Materials declaration and recycling information..................................... 15
A.1 Materials declaration ......................................................................................................15
A.2 Recycling information .....................................................................................................15
EC Declaration of Conformity ................................................................................... 16

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1 Product overview
The Flashlink DA-3GHD-2x4 is a multi bit-rate distribution amplifier module providing high
performance media distribution for various signal formats from 19.4Mbps up to 2970Mbps.
The unit can be configured to do cable equalizing and reclocking of SMPTE 424M, SMPTE
292M and SMPTE 259M signal formats.
The two inputs typically provide automatic cable equalizing for up to 70 meters of cable
(Belden 1694A at 2970Mbps) with a total of 6 or 8 reclocked outputs. The DA-3GHD-2x4 will
detect HD and SD rates and automatically switch to the correct output slew-rate.
The reclockers support the bit-rates 270Mbps, 1483.5Mbps, 1485Mbps 2967Mbps and
2970Mbps. For other rates, the reclockers automatically switch to bypass mode, and the DA3GHD-2x4 will work as a non-reclocking distribution amplifier with cable equalizers.
The DA-3GHD-2x4 also supports reclocking of DVB-ASI at 270Mbps, enabling all possible
rates including empty transport streams with only K28.5 padding packets. 4 of the outputs
are non-inverting and suitable for DVB-ASI.
The unit can be configured as a 1 x 8/6 distribution amplifier. Both input ports can be used.
The included intelligent change-over feature gives the ability to change input based on input
signal loss, loss of lock, EDH errors or a combination of the above.
There is also included a passive bypass function (with backplane board C2 and C4) from
both inputs to non-inverted outputs with less than 15 m loss of cable length (enables full
redundancy in case of mains failure).
The DA-3GHD-2x4 is designed for all distribution purposes in studio, duplication and
broadcast applications.
The DA-3GHD-2x4 main board can be combined with 4 different backplane boards giving
functions as follows:
Table 1. Product overview.
Please observe that –G versions cannot be used with N-Box, Flashlink one module desktop
box, due to mechanical issues.
Relay (passive
loop-through)

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Figure 1. DA-3GHD-2x4 block diagram

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2 Specifications
Electrical Outputs
- < -15dB, 5MHz -1.5GHz
- < -10dB, 1.5GHz - 3GHz
Output signal rise / fall time
20% - 80%
- SD limit: [0.4ns – 1.5ns]; <0.5ns rise/fall var.
- HD limit: < 270ps, <100ps rise/fall var.
- 3G HD limit: <135ps, <50ps rise/fall var.
- Output O1A, O1B, O2A and O2B: Non inverting electrical
- Remaining outputs: inverting electrical
- SD: <0.2 UI
- HD: <1 UI
- 3G HD: <1UI
- SD: <0.15 UI
- HD: <0.15 UI
- 3G HD: <0.2UI
>300m w/Belden 1694A, with BER < 10E-12
Input Cable Eq. @1485Mbps
>100m w/Belden 1694A, with BER < 10E-12
Input Cable Eq. @2970Mbps
>70m w/Belden 1694A, with BER < 10E-12
- < -15dB, 5MHz -1.5GHz
- < -10dB, 1.5GHz - 3GHz
- SD limit:
- 10Hz-1kHz: >1 UI
- 10kHz – 5MHz: >0.2 UI
- HD limit:
- 10Hz-100kHz: >1 UI
- 100kHz–10MHz: >0.2 UI
- 3G HD limit:
- 10Hz-100kHz: >2 UI
- 100kHz–10MHz: >0.3 UI
Automatic SD/ HD detection
Automatic output slew rate adjustment according to SMPTE
259M and SMPTE 292M / SMPTE 424M
270, 1483.5, 1485, 2967, 2970Mbps
Eq. bypass for non-video formats or low bit rates
SMPTE 424M, SMPTE 292M, SMPTE 259M, SMPTE 305M,
SMPTE 310M
EN50083-9 (on non-inverting outputs)

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3 Configuration
The DA-3GHD-2x4 supports a number of different formats. The correct configuration can
either be set with a DIP switch or with the GYDA system controller. The layout of DA-3GHD2x4 is shown in the drawing below with the DIP switch to the upper left position.
Figure 2. DA-3GHD-2x4 module DIP switches
DIP switch configuration must be set according to the table below:
Single distributed output
Single or dual
distribution amplifier
Cable equalizer Bypass
(Loss of signal will not
work on this mode)
Module controlled by
Gyda system controller
Module controlled by
DIP switches
Table 2. DA-3GHD DIP switches
All DIP switches are off when pointing towards the release handle.

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3.1 Configuration Examples
Typical configurations for DA-3GHD-2x4:
Figure 3. Distribution mode, Input 1 priority, Input 1 to all outputs, reclocker and
equalizer on
Figure 4. Distribution mode, Input 2 priority, Input 1 to 4 outputs, Input 2 to 4
outputs, transparent mode without equalization and reclocking.

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4 Connections
The DA-3GHD-2x4 has four dedicated back planes: DA-3GHD-2x4-C1, - C2, - C3 and – C4.
These modules are mounted at the rear of the sub-rack.
The modules are shown in figure 7 to 10.
Figure 7. Overview of the DA-3GHD-2x4-C1 connector module
Figure 8. Overview of the DA-3GHD-2x4-C2 connector module

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Figure 9. Overview of the DA-3GHD-2x4-C3 connector module
Figure 10. Overview of the DA-3GHD-2x4-C4 connector module
The electrical input signals are connected to the IN1 and IN2 BNCs and the electrical outputs
are connected to the O-- BNCs.
Please note that O1A, O1B, O2A and O2B have inverted signals. DVB-ASI
cannot be used on these outputs.
Unused inputs and outputs should be terminated with 75 ohm to meet the
specifications.

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5 Operation
The status of the module can be easily monitored visually by the LEDs at the front of the
module. The LEDs are visible through the front panel as shown in Error! Reference source
not found. below.
Figure 11: Panel indicator overview for (Text not printed on the front panel).
The functions of the different LEDs are described in
.
Module is OK
Module has power
No Reclocker
Lock & Loss Of
Signal
No Reclocker lock
& Signal present
Reclocker in lock &
Signal present
No Reclocker
Lock & Loss Of
Signal
No Reclocker lock
& Signal present
Reclocker in lock &
Signal present
Main/Bypass
Table 3: LED status description

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GPI name
(setup1/
setup2)
Function
(setup1/ setup2)
Electrical
Maximums
for GPI
outputs:
Max current:
100mA
Max voltage:
30V
Max power:
200mW
General error status for the
module.
Inverted Open
Collector
(open is alarm)
Loss of signal or lock at
selected input
Reset selected input to main
Set selected input to
standby
Table 4 - Description of GPI interface
Figure 12. GPI Interface

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General environmental requirements for Nevion equipment
The equipment will meet the guaranteed performance specification under the following
environmental conditions:
Operating room temperature range:
Operating relative humidity range:
The equipment will operate without damage under the following environmental
conditions:

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Product Warranty
The warranty terms and conditions for the product(s) covered by this manual follow the
General Sales Conditions by Nevion, which are available on the company web site:
www.nevion.com

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Appendix A Materials declaration and recycling information
A.1 Materials declaration
For product sold into China after 1st March 2007, we comply with the “Administrative
Measure on the Control of Pollution by Electronic Information Products”. In the first stage of
this legislation, content of six hazardous materials has to be declared. The table below
shows the required information.
Toxic or hazardous substances and elements
六价铬
Hexavalent
Chromium
(Cr(VI))
多溴联苯
Polybrominated
biphenyls
(PBB)
多溴二苯醚
Polybrominated
diphenyl ethers
(PBDE)
O: Indicates that this toxic or hazardous substance contained in all of the homogeneous materials for
this part is below the limit requirement in SJ/T11363-2006.
X: Indicates that this toxic or hazardous substance contained in at least one of the homogeneous
materials used for this part is above the limit requirement in SJ/T11363-2006.
This is indicated by the product marking:
A.2 Recycling information
Nevion provides assistance to customers and recyclers through our web site
http://www.nevion.com/. Please contact Nevion’s Customer Support for assistance with
recycling if this site does not show the information you require.
Where it is not possible to return the product to Nevion or its agents for recycling, the
following general information may be of assistance:
Before attempting disassembly, ensure the product is completely disconnected from
power and signal connections.
All major parts are marked or labeled to show their material content.
Depending on the date of manufacture, this product may contain lead in solder.
Some circuit boards may contain battery-backed memory devices.

Nevion Europe
P.O. Box 1020, 3204 Sandefjord, Norway – Tel: +47 33 48 99 99 – Fax: +47 33 48 99 98
www.nevion.com
EC Declaration of Conformity
Nevion Europe AS
P.O. Box 1020, 3204 Sandefjord, Norway
AUTHORIZED REPRESENTATIVE
(Established within the EEA)
Multi Rate 3GHD-SDI Distribution Amplifier
DIRECTIVES this equipment complies with
Low voltage (EU Directive 2006/95/EC)
EMC (EU Directive 2004/108/EC)
RoHS (EU Directive 2002/95/EC)
China RoHS1
WEEE (EU Directive 2002/96/EC)
REACH
HARMONISED STANDARDS applied in order
to verify compliance with Directive(s)
EN 55103-1:2010
EN 55103-2:2010
TECHNICAL CONSTRUCTION FILE NO
YEAR WHICH THE CE-MARK WAS AFFIXED
TEST AUTHORIZED SIGNATORY
AUTHORIZED
REPRESENTATIVE
(Established within EEA)
QA Director, Nevion Europe
(authorized signature)
Administration on the Control of Pollution Caused by Electronic Information Products