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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