Nevion HDSDI-CHO-2x1 User Manual

HDSDI-CHO-2x1

HD-SDI-CHO-2x1-PB

HD-SDI Change-over 2x1

User manual

Rev. G

Nevion

Nordre Kullerød 1
3241 Sandefjord
Norway
Tel: [phone]

nevion.com

HDSDI-CHO-2x1 Rev. G

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

G 6 2015-05-12

MB

Cover page update.
DoC removed; no other changes to content.

6 5 2010-06-14

SHH

Added passive bypass option to manual in Chapter 1
and 4.
Updated GPI table and description Chapter 5 to new
Status functionality.
Updated Declaration of Conformity.

5 4 2010-04-08

NBS

Corrected table in Chapter 6.

4 3 2008-07-15

AS

Added Declaration of Conformity

3 2 2007-10-26

NBS

New front page.

2 1 2007-10-08

NBS

Added Materials Declaration and EFUP.

1 0 2006-08-10

New firmware revision has another timer and slightly
different latch.

0 A 2005-04-07

First released version.

Nevion Support

Revision history

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

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HDSDI-CHO-2x1 Rev. G

Contents

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

1.1 Product description .......................................................................................................... 4

1.2 Product versions .............................................................................................................. 4

2 Specifications ..................................................................................................................... 5

2.1 Electrical input ................................................................ ................................................. 5

2.2 Electrical output ............................................................................................................... 5

2.3 Features .......................................................................................................................... 5

2.4 Electrical .......................................................................................................................... 5

2.5 Supported standards ....................................................................................................... 5

3 Format Configuration .......................................................................................................... 6

3.1 Configuration examples ................................................................................................... 7

4 Connections ....................................................................................................................... 8

5 Module status ..................................................................................................................... 9

5.1 GPI alarm and control – Module status outputs and selection of inputs ........................... 9

5.2 Front panel - Status monitoring .......................................................................................10

6 Interface with GYDA and RS-422 command set ................................................................11

Appendix A Materials declaration and recycling information .................................................14

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HDSDI-CHO-2x1 Rev. G

HDSDI-CHO-2x1

2x1 HD/SD-SDI changeover

HDSDI-CHO-2x1-PB

2x1 HD/SD-SDI change over with passive bypass

1 Product overview

1.1 Product description

Figure 1: HDSDI-CHO-2x1(-PB) functional overview

The Flashlink HDSDI-CHO-2x1 is a serial digital video 2x1 change-over module providing
high performance line protection for various signal formats from 1Mbps up to 1485Mbps. The
unit can be configured to perform cable equalizing and re-clocking of SMPTE 292M, SMPTE
259M and DVB-ASI signal formats. The switching criteria can be selected to be based on
loss of input signal or loss of lock (re-clocker). The switch can either be latching or non­latching (in loss of lock mode, only latching switch is available). It is also possible to control
the switch with GPI inputs, with the GYDA system controller or with the open protocol RS422
interface.

The two inputs typically provide automatic cable equalizers for up to 250 meters of cable
(Belden 8281A at 270Mbps) with a 2 x 1 switch in front of a re-clocker with 4 outputs. The re­clocker supports the bit-rates; 143, 177, 270, 360, 540 and 1485Mbps. For other rates, the
re-clocker automatically switches to bypass mode and the HDSDI-CHO-2x1 will work as a
non-reclocking 2x1 change-over unit with cable equalizer. The HDSDI-CHO-2x1 also has a
special DVB-ASI mode, enabling all possible rates including empty transport streams with
only K28.5 padding packets. 2 outputs are non-inverting to support DVB-ASI compatibility.

The HDSDI-CHO-2x1 is designed for various line protection applications for studio, campus,
broadcast and telecom.

New in firmware version 2.0.0 or newer: When latched to standby input, latch will not hold
against missing signal on standby input if the signal on main input has been restored. Also, a

secondary timer has been added, which handles debouncing of the “signal on main input
returns” condition. The primary timer handles debouncing of LOS on both main and standby

inputs.

1.2 Product versions

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HDSDI-CHO-2x1 Rev. G

Number of inputs:

2.

Data rate NRZ:

1 – 1485 Mbps.

Equalization:

Automatic;
Cable reclocker can be bypassed to support bit rates down to
1Mbps.

Impedance:

75 ohm

Return loss:

≤15dB @ 1485MHz.

Signal level:

nom. 800mV;
Approximately 200mV min. when equalizer switched to Bypass.

Connector:

BNC.

Number of outputs:

4.

Connector:

BNC.

Impedance:

75 ohm.

Return loss:

≤15dB @ 1485MHz.

Jitter:

< 0.2UI.

Peak to peak signal level:

0.8V +/- 0.1V.

Signal polarity

2 outputs non-inverting, 2 outputs inverting.

Re-clocking:

Automatic clock rate detection;
Supported clock rates: 143, 177, 270, 360, 540 and 1485 Mbps.

Power:

+5V DC / 3W Max.

Control:

Control system for access to setup and module status with BITE
(Built-In Test Equipment) for use with GYDA Control System.

SMPTE:

SMPTE292M, SMPTE259M, SMPTE305.2M, SMPTE310M,
SMPTE344M

DVB-ASI:

EN50083-9

2 Specifications

2.1 Electrical input

2.2 Electrical output

2.3 Features

2.4 Electrical

2.5 Supported standards

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HDSDI-CHO-2x1 Rev. G

Switch #

Label

Function DIP=OFF

Function DIP=ON

Comment

1

LTC

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

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

“Sticky” switching

2

IN1

Input 2 priority

Input 1 priority

Select main input

3

L/R

Loss of signal based
switch decision

Reclocker based switch
decision

Signal integrity
decision

4

TME

Ripple rejection OFF

Ripple rejection ON
(variable delay)

Timing

5

RCL

Reclocker Bypass

Reclocker ON

Reclocker mode

6

EQ

Cable equalizer Bypass.
(Loss of signal based
switch decision will not
work on this mode)

Cable equalizer ON

Equalizer mode

7

ASI

SDI 177Mbps Reclocker
support

DVB-ASI Reclocker
support

ASI mode

8

OVR

GYDA control.
Config. with GYDA

Override GYDA control.
Config. with DIP switch

Select GYDA
config. mode

3 Format Configuration

The HDSDI-CHO-2x1 can support a number of different formats. The correct configuration
can either be set with a DIP switch or with the GYDA Control System. The layout of HDSDI­CHO-2x1 is shown in the drawing below with the DIP switch to the upper left position.

Figure 2: HDSDI-CHO-2x1 board layout

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

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

When the default setting is selected, all clock rates for HD, SD and DVB-ASI are
automatically configured by the module itself.

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HDSDI-CHO-2x1 Rev. G

3.1 Configuration examples

Typical configurations for HDSDI-CHO-2x1:

Figure 3: Default for HD, SD or DVB-ASI;

Non-latching, Input1=main, LOS based, Reclocking, Ripple rejection OFF

Figure 4: SD or DVB-ASI; Latching, Reclocker based decision

Figure 5: Transparent Mode for Non-supported rates with Ripple rejection timer;

Latching, LOS based decision, Time ON, reclocking OFF

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HDSDI-CHO-2x1 Rev. G

4 Connections

The HDSDI-CHO-2x1 and HDSDI-CHO-2x1-PB has dedicated connector modules, SDI­CHO-2x1-C1 and FRS-HD-CHO-C1. These modules are mounted at the rear of the sub­rack. The modules are shown in the figure below.

Figure 6: SDI-CHO-2X1-C1 FRS-HD-CHO C1

The electrical input signals are connected to the IN1 and IN2 BNC’s. The electrical outputs
are connected to the O1 to O4 BNC’s. Please note that only 2 outputs are non-inverted and

suitable for DVB-ASI. The Sync input connectors are not in use on this product.

The details of how the connector module is mounted, is found in the user manual
for the sub-rack frame FR-2RU-10-2-xx.

This manual is also available from our web site: http://www.nevion.com/

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HDSDI-CHO-2x1 Rev. G

Signal

Name

Pin #

Mode

Direction

Status

General error status for the module

Pin 1

Inverted Open
Collector

Output
LOS

Loss Of Signal at selected input

Pin 2

Open Collector

Output

Input 1

Input 1 selected (IN1)

Pin 3

Open Collector

Output

Input 2

Input 2 selected (IN2)

Pin 4

Open Collector

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

Ground

0 volt pin

Pin 8

0V.

5 Module status

The status of the module can be monitored in three ways.

1. GYDA System Controller (optional).

2. GPI at the rear of the sub-rack.

3. LED’s at the front of the sub-rack.

Of these three, the GPI and the LED’s are mounted on the module itself, whereas the GYDA

System Controller is a separate module giving detailed information on the card status. The

functions of the GPI and the LED’s are described in sections 5.1 and 5.2. The GYDA

controller is described in a separate user manual.

5.1 GPI alarm and control – Module status outputs and selection of
inputs

These outputs can be used for wiring up alarms for third party control systems. The GPI
outputs are open collector outputs, sinking to ground when an alarm is triggered. The GPI
connector is shown in the figure below.

As of hardware version 4 or newer of the product, the Status signal is inverted,
sinking to ground when signal is good. Earlier versions have a non-inverted
Status signal.

The two GPI inputs can be used to control switching of inputs.
Electrical Maximums for GPI outputs

Max current: 100mA
Max voltage: 30V

HDSDI-CHO-2X1 module GPI pinning:

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Figure 7: GPI Outlet

HDSDI-CHO-2x1 Rev. G

Diode \ state

Red LED

Yellow LED

Green LED

No light

Status

Module is faulty

Module is OK;
Module power is
OK

Module has no
power

Lock&LOS

Loss Of Signal &
No Reclocker
lock

Signal present &
No Reclocker
lock

Signal present &
Reclocker in lock

Input 1

No input signal
on Input 1

Signal present &
not selected

Signal present &
Input 1 selected

Input 2

No input signal
on Input 2

Signal present &
not selected

Signal present &
Input 2 selected

5.2 Front panel - Status monitoring

The status of the module can be easily monitored visually by the LED’s at the front of the

module. The LED’s are visible through the front panel as shown in the figure below.

Figure 8: indicator overview for HDSDI-CHO-2x1;

(Text not printed on the front panel)

The HDSDI-CHO-2x1 has 4 LED’s each showing a status corresponding to the GPI pinning.
The position of the different LED’s is shown in the figure above.

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HDSDI-CHO-2x1 Rev. G

Command

Response

Comment

?

See protocol description

The “hello” command

info

Module status information

reset

OK

Reset latch to main input channel.

set auto

Auto

Set to automatic input channel selection.
Automatic input selection enabled.

set main

Main

Set to main input channel. Automatic input
selection disabled.

set standby

Standby

Set to standby input channel. Automatic input
selection disabled.

timer off

OK

Switch off time delay for input selection
automatics

timer on

OK

Switch on time delay for input selection
automatics

timer xx

OK

xx is the delay time for the timer. For firmware
version 2.0.0 or newer, this is only used for
switching from main to standby. (Value stored in
EEPROM)

timer_rst xx

OK

xx is the delay time for the secondary timer,
used on FW 2.0.0 or newer to reset back to
main. (Value stored in EEPROM)

mode los

OK

Input selection automatics based on loss of
signal

mode rcl

OK

Input selection automatics based on reclocker in
lock

asi on

OK

Set DVB-ASI Reclocker support

asi off

OK

Set SDI 177Mbps Reclocker support

latch on

OK

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

latch off

OK

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

rcl on

OK

Reclocker on

rcl off

OK

Reclocker Bypass

eq on

OK

Cable equalizer on

eq off

OK

Cable equalizer Bypass (Los of signal based
switch decision will not work on this mode)

main 1

OK

Input 1 configured as main. Input 2 is standby.

main 2

OK

Input 2 configured as main. Input 1 is standby.

6 Interface with GYDA and RS-422 command set

All commands follow the Flashlink protocol and can be used for direct control access to the
module. The control system can either be a GYDA-SC or a third-party control system with
integrated Flashlink protocol. The module can also be manually controlled with a VT100
compatible terminal program.

The protocol can be found on our web page; http://www.nevion.com

HDSDI-CHO-2x1 Command table

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HDSDI-CHO-2x1 Rev. G

1.

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

-

Operating room temperature range:

0°C to 40°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 50°C

-

Relative humidity range:

<95% (non-condensing)

General environmental requirements for Nevion equipment

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HDSDI-CHO-2x1 Rev. G

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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HDSDI-CHO-2x1 Rev. G

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)

HDSDI-CHO-2x1

0 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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