Nevion 3GHD-CHO-2x4 User Manual

3GHD-CHO-2x4/2x3

Multi Rate 3GHD-SDI Distribution Amplifier

with change-over

User manual

Rev. C

Nevion

Nordre Kullerød 1
3241 Sandefjord
Norway
Tel: [phone]

nevion.com

3GHD-CHO-2x4/2x3 Rev. C

Nevion Europe
P.O. Box 1020

3204 Sandefjord, Norway
Support phone 1: [phone]
Support phone 2: [phone]

Nevion USA

1600 Emerson Avenue

Oxnard, CA 93033, USA

Toll free North America: [phone]

Outside North America: [phone]

E-mail: [e-mail]

See http://www.nevion.com/support/ for service hours for customer support globally.

Rev.

Repl.

Date

Sign

Change description

C 2 2014-06-02

OEH

MMI

Added setting where output 2 does opposite of
cho
Updated cover page and removed Declaration of
Conformity.

2 1 2012-11-19

RB

Updated table 3 - Description of GPI interface:

- GPI “Main/Backup” renamed to “Main”,
and it senses main and not selected
input.

- Changed to focus on outputs rather than
inputs for signal present.

Specifications for electrical outputs:

- Added note regarding output signal level
when using passive bypass versions.

Specifications for electrical inputs:

- Divided the cable equalization
@2970Mbps into 2 classes; with and
without relays for passive bypass.

Product overview:

- Added comment of 60 meters of cable
equalizing for 2970Mbps with the passive
bypass versions.

1 0 2011-09-15

MR/AJM

Changed description of VSTD to not be
supported on 3G.
Added Multicon Gyda status and configuration.

0 - 2011-01-31

MR

Initial revision

Nevion Support

Revision history

Current revision of this document is the uppermost in the table below.

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3GHD-CHO-2x4/2x3 Rev. C

Contents

Revision history .......................................................................................................... 2

1 Product overview ..................................................................................................... 4

2 Variants ................................................................................................................... 5

3 Specifications .......................................................................................................... 6

4 Status by LED’s ....................................................................................................... 7

5 Status and control from GPI .................................................................................... 8

6 Configuration by DIP................................................................................................ 9

6.1 Configuration Examples..................................................................................................10

7 Status from Multicon Gyda .................................................................................... 11

7.1 Label and picture ............................................................................................................11

7.2 Input ...............................................................................................................................11

7.3 GPI .................................................................................................................................11

7.4 Voltage ...........................................................................................................................11

7.5 Reclocker .......................................................................................................................12

7.6 Video analyzer ................................................................................................................12

7.7 Alarms ............................................................................................................................12

8 Configuration from Multicon Gyda ......................................................................... 13

8.1 Card label .......................................................................................................................13

8.2 Firmware upgrade ..........................................................................................................13

8.3 Electrical input ................................................................................................................13

8.4 Reclocker .......................................................................................................................13

8.5 Electrical output ..............................................................................................................13

8.6 Change over block ..........................................................................................................14

8.7 Video triggers .................................................................................................................15

8.8 Video analyzers ..............................................................................................................17

9 Alarms on Multicon Gyda ....................................................................................... 18

9.1 Electrical input ................................................................................................................18

9.2 Reclocker .......................................................................................................................18

9.3 Change over ...................................................................................................................18

9.4 GPI .................................................................................................................................18

9.5 Voltage ...........................................................................................................................18

10 Information from Multicon Gyda ........................................................................... 19

11 Backplane ............................................................................................................ 20

General environmental requirements for Nevion equipment..................................... 22

Product Warranty ...................................................................................................... 23

Appendix A Materials declaration and recycling information..................................... 24

A.1 Materials declaration ......................................................................................................24

A.2 Recycling information ................................................................................................ .....24

EC Declaration of Conformity ...................................... Error! Bookmark not defined.

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3GHD-CHO-2x4/2x3 Rev. C

1 Product overview

The Flashlink 3GHD-CHO-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 (60 meters for
the passive bypass versions) of cable (Belden 1694A at 2970Mbps) with a total of 8/6
reclocked outputs. The 3GHD-CHO-2x4 will detect 3GHD, 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
3GHD-CHO-2x4 will work as a non-reclocking distribution amplifier with cable equalizers.

The 3GHD-CHO-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 including any of the input ports.
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 3GHD-CHO-2x4 is designed for all distribution purposes in studio, duplication and
broadcast applications.

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3GHD-CHO-2x4/2x3 Rev. C

Product

Type of

backplane

board

#

Outputs

GPI I/O

Relay (passive

loop-through)

19425 3GHD-CHO-2x4

Version C1

8

No

No

19427 3GHD-CHO-2x4-PB

Version C2

8

No

Yes

19429 3GHD-CHO-2x3-G

Version C3

6

Yes

No

19431 3GHD-CHO-2x3-PB­G

Version C4

6

Yes

Yes

2 Variants

The 3GHD-CHO-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.

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3GHD-CHO-2x4/2x3 Rev. C

Connectors

75 Ohm BNC

Output Return loss

- < -15dB, 5MHz -1.5GHz

- < -10dB, 1.5GHz - 3GHz

Output signal level

800mV +/- 10%
Note: for the passive bypass versions (using backplane C2 or
C4) the signal is attenuated with a cable equivalent of 15m.

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.

Amplitude overshoot

<10%

Polarity

- Output O1A, O1B, O2A and O2B: Non inverting electrical

- Remaining outputs: inverting electrical

Output timing jitter

- SD: <0.2 UI

- HD: <1 UI

- 3G HD: <1UI

Output alignment jitter

- SD: <0.15 UI

- HD: <0.15 UI

- 3G HD: <0.2UI

Connectors

75 Ohm BNC

Input Cable Eq. @270Mbps

>300m w/Belden 1694A, with BER < 10E-12

Input Cable Eq. @1485Mbps

>100m w/Belden 1694A, with BER < 10E-12

Input Cable Eq. @2970Mbps

Ver. C1 and C3: >70m w/Belden 1694A, with BER < 10E-12
Ver. C2 and C4: >60m w/Belden 1694A, with BER < 10E-12

Input Return loss

- < -15dB, 5MHz -1.5GHz

- < -10dB, 1.5GHz - 3GHz

Jitter tolerance

- 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

Reclocking:

Automatic SD/ HD detection
Automatic output slew rate adjustment according to SMPTE
259M and SMPTE 292M/ SMPTE 424M

Supported clock rates:

270, 1483.5, 1485, 2967, 2970Mbps

Input equalizers:

Eq. bypass for non-video formats or low bit rates

SMPTE:

SMPTE 424M, SMPTE 292M, SMPTE 259M, SMPTE 305M,
SMPTE 310M

DVB-ASI:

EN50083-9 (on non-inverting outputs)

DC power consumption:

+5V / < 4.5W

3 Specifications

Electrical Outputs

Electrical Inputs

Features

Supported standards

General

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3GHD-CHO-2x4/2x3 Rev. C

Diode \ state

Red LED

Yellow LED

Green LED

No light

Status

Module is faulty

Module is OK
Module has power

Module has
no power

LOL & LOS 1
(Input 1)

No Reclocker
Lock & Loss Of
Signal

No Reclocker lock
& Signal present

Reclocker in lock &
Signal present

LOL & LOS 2
(Input 2)

No Reclocker
Lock & Loss Of
Signal

No Reclocker lock
& Signal present

Reclocker in lock &
Signal present
Main/Bypass

No stable input

Bypass selected

Main selected

Status

LOL & LOS 1

LOL & LOS 2

Main/Bypass

4 Status by LED’s

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 below.

Figure 1 - Panel indicator overview (Text not printed on the front panel)

The functions of the different LEDs are described in table below.

Table 2. LED status description

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3GHD-CHO-2x4/2x3 Rev. C

GPI name

(setup1/

setup2)

Function

(setup1/ setup2)

Pin #

Mode

Direction

Electrical

Maximums

for GPI

outputs:

Max current:
100mA

Max voltage:
30V

Max power:
200mW

Status

General error status for the
module

Pin 1 Inverted Open
Collector
(open is
alarm)

Output

Main

Loss of signal or lock at
main input

Pin 2 Inverted Open
Collector
(open is
alarm)

Output

Signal
present 1

Good signal routed to
output 1

Pin
3

Inverted Open
Collector
(open is
alarm)

Output

Signal
present 2

Good signal routed to
output 2

Pin
4

Inverted Open
Collector
(open is
alarm)

Output
Reset

Reset selected input to
main

Pin 5 TTL, 0V =
active level

Input

Set

Set selected input to
standby

Pin 6 TTL, 0V =
active level

Input

Not used

Pin 7

Ground

0 volt pin

Pin 8 0V.

5 Status and control from GPI

On the backplane there is a GPI port. This connector can be used for monitoring the modules
status. Also the change over function can be controlled through this connector.

Table 3 - Description of GPI interface

Figure 2 - GPI interface

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3GHD-CHO-2x4/2x3 Rev. C

Switch #

Label

Function DIP=OFF

Function DIP=ON

Comment

1

CHO

Distribution functionality

Change-over
functionality

Card functionality

2

IN1

Input 1 standby, 2 main

Input 1 main, 2
standby

Select main/standby
for CHO and DA

3

S/D

Single 1x8 (1x6 with
GPI) from main

Dual 1x4 (1x3 with
GPI)

With CHO, dual mode
gives CHO +
distributed standby
signal

4

RUL

Loss of signal

Loss of lock

Signal integrity
decision in change­over mode.
N/A in distribution
mode.

5

LTC

Non-latching switch. Will
automatically return to
main when input signal is

”good”

Latching switch. Must
be reset to return
from standby to main

“Sticky” switching
”good” is depending on

switch criteria in
change-over mode.
N/A in distribution
mode.

6

RCL

Reclocker Bypass

Reclocker ON

Reclocker mode

7

EQ

Cable equalizer Bypass
(Loss of signal will not
work on this mode)

Cable Equalizer ON

Equalizer mode

8

OVR

Module controlled by
Gyda system controller

Module controlled by
DIP switches

Select GYDA config.
mode

DIP switches

6 Configuration by DIP

The 3GHD-CHO-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 3GHD-CHO­2x4 is shown in the drawing below.

Figure 3. 3GHD-CHO-2x4 module layout

DIP switch configuration must be set according to the table below:

All DIP switches are off when pointing towards the release handle.

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Table 4: 3GHD-CHO DIP switches

3GHD-CHO-2x4/2x3 Rev. C

Figure 5. Distribution mode, Input 2 priority, Input 1 to 4 outputs,
Input 2 to 4 outputs, transparent mode without equalization and reclocking.

Figure 4. Distribution mode, Input 1 priority, Input 1 to all outputs,
reclocker and equalizer on.

Figure 6. Change-over mode, input 1 priority, single distributed output,
loss of lock criteria, non latching switch, reclocker and equalizer on

6.1 Configuration Examples

Typical configurations for 3GHD-CHO-2x4:

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3GHD-CHO-2x4/2x3 Rev. C

7 Status from Multicon Gyda

7.1 Label and picture

The module label is show above the picture. The picture is changing depending on the status
of the module. All alarms are shown with red crosses. The output selection and the main input
on the change over block are shown by changing the lines inside the switch block.

7.2 Input

Input signal status is show together with the configuration of the inputs; bypass, mute or
normal.

7.3 GPI

Show the status of the input pin on the GPI connector on the backplane. Inactive means no
signal while Active mean signal.

7.4 Voltage

Shows the actual voltages on the module together with the nominal voltages.

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3GHD-CHO-2x4/2x3 Rev. C

7.5 Reclocker

Shows the status of the reclocker together with the formats and bitrates.

7.6 Video analyzer

Shows the status of the video analyzer for each input together with the level B channel status.
Also the video format is shown. The error counter shows the number of errors that has happen
according to the video analyzer configuration. The error count can be reset by pressing the
reset button. This analyzer do not reset the changeover latch which has to be done by the GPI
connector or for the configuration tab.

7.7 Alarms

All active alarms are shown as red and can be acknowledge by pressing the button. The alarms
then change color to yellow, meaning all acknowledged alarms is shown in yellow. All restored
alarms are shown in green, by acknowledge them they will disappear form the list.

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3GHD-CHO-2x4/2x3 Rev. C

8 Configuration from Multicon Gyda

8.1 Card label

Assign a name to the Flashlink module, up to 31 characters. When the locate is pushed all
indicators/LED’s on front of the module will flash for 120 seconds, alternative an period can be
enter into the sec box.

8.2 Firmware upgrade

Update the firmware on the Flashlink module. The firmware file first has to be uploaded to
Multicon Gyda first by ftp. See user manual on Multicon Gyda for help on uploading.

8.3 Electrical input

For SDI signal set the electrical input to normal. For MADI and other low bitrates none SDI
signal set this to EQ bypass. Mute will mute the input signal, use this when the input has no
signal to prevent noise to appear on the input.

8.4 Reclocker

For SDI signal set to enable, else set to bypass. Autobypass only works if the reclocker is
enabled. With autobypass on the reclocker will set the reclocker in bypass mode when none
SDI signal is detected.

8.5 Electrical output

Each output can select getting signal from either the two inputs or from the change over block
using automatic selection.

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3GHD-CHO-2x4/2x3 Rev. C

8.6 Change over block

The change over block is called “main input” and all alarms from the change over block are
labeled “main input”. *In the following figure the change over function is explained.

The main input is selected. The other input will automatically be the backup input.

In the rules radio button loss of lock or loss of input signal is chosen for the main trigger for
doing change over. Addition to this rules and EDH trigger can be setup, see chapter 8.7.

The trigger has an adjustable time control, called "hold time" and “lock time”. This is used for
three situations:

1. Multiple bursts of error within timer duration triggers a switching to standby.

2. Single continuous error condition whose duration exceeds timer triggers a switching
to standby.

3. Error free periods, whose duration exceeds timer, triggers a switching back to main.

The “hold time” is for main to backup trigging while the “lock time” is for backup to main

restoring of the signal.

The latch will select the behavior of the change over. The following block diagram explains the
behavior of the change over.

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3GHD-CHO-2x4/2x3 Rev. C

Main is

selected

Backup is

selected

Main restored

Main is removed

Backup is removed
Main is removed

Backup is removed

Main is

selected

Backup is

selected

Main restored

Main removed

Backup removedBackup removed

Backup is

selected

Backup removed

Reset command

Main removed

Main is

selected

Backup is

selected

Main restored

Main removed

Backup removedBackup removed

Backup is

selected

Reset command or

Backup removed

Main removed

When the latch is set to off:

Figure 7

When latch is on and “allow latch to break on los” is inactive:

Figure 8

When latch is on and “Allow latch to break on los” is active:

Figure 9

8.7 Output 2 behaviour when set to CHO

This option was implemented in software version 1.3.146, and can only be enabled/disabled

using GYDA/SNMP. When enabled (and output 2 is set to “Automatic selection” according to

chapter 8.5), output 2 will do the opposite of the normal automatic selector. This is useful for
situations where both inputs should be monitored by external equipment in addition to the
internal video monitors.

With Multicon release older than 4.2.0, the option is named GPI 2 (when the module is used
with a backplane with no GPI) or GPI 4 (when used with GPI backplane). Active in this instance
is to do the opposite of the automatic selection).

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3GHD-CHO-2x4/2x3 Rev. C

EDH

No EDH packets (SD only)

VSTD

SMPTE 352 packets do not correspond to detected video standard (SD/HD
only) Not supported for 3G.

FFCRC

Full Field CRC (SD only)

APCRC

Active Picture CRC (SD only)

LOCK

Analyzer chip is not locked to a bit stream (or stream 2 not present, for
"Stream 2" analyzer)

CCS

Chroma channel ancillary data check sum error

YCS

Luma channel ancillary data check sum error

CCRC

Chroma channel video data check sum error

YCRC

Luma channel video data check sum error

LNUM

Line number error

SAV

Start of active video flags missing or misplaced

EAV

End of active video flags missing or misplaced

8.8 Video triggers

A trigger is another way of controlling the change-over functionality than the loss of lock and
loss of signal. Each input has their one video trigger, called channel 1 and 2 trigger. In addition
also each channel has an A and B analyzer which reflect the level A and B in a 3G-SDI stream.
The triggers are using the same information (and therefore have the same bit names as the
analyzers), but have separate bit masks. This means that it is possible to count one set of error
types, while using a different error type to control the change-over. This video triggers can
trigger a change over together with loss of lock or loss of signal. The video trigger can be
enabled by selecting the four disable/enable radio buttons

There is one trigger for each analyzer, there are triggers for both the main and standby input,
an error condition on main input doesn't necessarily mean the change-over will switch, but for
simplicity the following description assumes that the standby channel is always "good".

These trigger event is:

Errors are checked once per video field (LOCK errors are counted every 20ms when no video
is present). If an error occurs, it is checked against the bit mask, and if selected for counting
increments the error counter. An SNMP tool is recommended for tracking error counts over
time, with selectable limits on error rate and max count before generating a warning.

Each trigger has an adjustable time control, called "hold time". This is used for three situations:

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3GHD-CHO-2x4/2x3 Rev. C

EDH

No EDH packets (SD only)

VSTD

SMPTE 352 packets do not correspond to detected video standard (SD/HD
only) Not supported for 3G.

FFCRC

Full Field CRC (SD only)

APCRC

Active Picture CRC (SD only)

LOCK

Analyzer chip is not locked to a bit stream (or stream 2 not present, for
"Stream 2" analyzer)

CCS

Chroma channel ancillary data check sum error

YCS

Luma channel ancillary data check sum error

CCRC

Chroma channel video data check sum error

YCRC

Luma channel video data check sum error

LNUM

Line number error

SAV

Start of active video flags missing or misplaced

EAV

End of active video flags missing or misplaced

1. Multiple bursts of error within timer duration triggers a switching to standby.

2. Single continuous error condition whose duration exceeds timer triggers a switching
to standby.

3. Error free periods, whose duration exceeds timer, triggers a switching back to main.

The trigger also has a setting for "bit operator". It is possible to do a logical AND on the bits
after applying the mask. Set to AND, all the individual error types that have been enabled must
be occurring to count as an error condition. Set to OR, any enabled error type will suffice.

8.9 Video analyzers

The two inputs have their own analyzer, called channel 1 and 2. In addition also each channel
has an A and B analyzer which reflect the level A and B in a 3G-SDI stream.

These errors can be counted (or ignored) based on the settings in the configuration view:

Errors are checked once per video field (LOCK errors are counted every 20ms when no video
is present). If an error occurs, it is checked against the bit mask, and if selected for counting
increments the error counter. An SNMP tool is recommended for tracking error counts over
time, with selectable limits on error rate and max count before generating a warning.

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3GHD-CHO-2x4/2x3 Rev. C

9 Alarms on Multicon Gyda

Each alarm can be set to be ignored by the Multicon Gyda alarm handling. Also SNMP tram
can be configured to send or ignore alarms. Configure the alarms in Multicon Gyda do not
change the behavior of the LED’s on the module.

9.1 Electrical input

If the electrical input is missing this alarm will be raised

9.2 Reclocker

If the reclocker does not lock to the incoming signal an alarm will be raised.

9.3 Change over

If the changeover has switch to the backup channel this alarm will be raised.

9.4 GPI

If an input signal is present on the GPI input, these alarms will be raised.

9.5 Voltage

If the voltages is out of the range, these alarms will be raised.

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3GHD-CHO-2x4/2x3 Rev. C

10 Information from Multicon Gyda

In the configuration tab the version of the hardware and software is shown. Also the cards
unique serial number is shown.

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3GHD-CHO-2x4/2x3 Rev. C

Figure 10. Overview of the DA-3G-2x4-C1 connector module

Figure 11. Overview of the DA-3G-2x4-C2 connector module

11 Backplane

The 3GHD-CHO-2xn has four dedicated backplane modules: DA-3G-2x4-C1, - C2, - C3 and –
C4. These modules are mounted at the rear of the sub-rack.

The modules are shown in figure 6 to 9.

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3GHD-CHO-2x4/2x3 Rev. C

Figure 12. Overview of the DA-3G-2x4-C3 connector module

Figure 13. Overview of the DA-3G-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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3GHD-CHO-2x4/2x3 Rev. C

1.

The equipment will meet the guaranteed performance specification under the
following environmental conditions:

-

Operating room temperature range:

0°C to 45°C

-

Operating relative humidity range:

<90% (non-condensing)

2.

The equipment will operate without damage under the following environmental
conditions:

-

Temperature range:

-10°C to 55°C

-

Relative humidity range:

<95% (non-condensing)

General environmental requirements for Nevion equipment

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3GHD-CHO-2x4/2x3 Rev. C

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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3GHD-CHO-2x4/2x3 Rev. C

組成名稱

Part Name

Toxic or hazardous substances and elements

鉛

Lead

(Pb)

汞

Mercury

(Hg)

镉

Cadmium

(Cd)

六价铬

Hexavalent

Chromium

(Cr(VI))

多溴联苯

Polybrominated

biphenyls

(PBB)

多溴二苯醚

Polybrominated

diphenyl ethers

(PBDE)

3GHD-CHO-2x4
/2x3

O O O O O

O

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.

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.

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.

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