Nevion SDI-CHO-2x1-PB User Manual

SDI-CHO-2x1-PB

SDI-CHO-2x1

2x1 SDI change-over with relayed input bypass

User manual

Rev. E

Nevion

Nordre Kullerød 1
3241 Sandefjord
Norway
Tel: [phone]

nevion.com

SDI-CHO-2x1/ SDI-CHO-2x1-PB Rev. E

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: +1 (805) 247-

8560

E-mail: [e-mail]

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

Rev.

Repl.

Date

Sign

Change description

E 4 2015-05-14

MB

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

4 3 2012-05-21

SHH

Added –PB product. Changed template.

3 2 2007-10-29

New front page.

2 1 2007-10-08

Added Materials Declaration and EFUP

1 0 10.08.06

New firmware revision has another timer and
slightly different latch

0 A 19.12.03

First released version

A 22.09.03

Preliminary version

Nevion Support

Revision history

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

nevion.com | 2

SDI-CHO-2x1/ SDI-CHO-2x1-PB Rev. E

Contents

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

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

1.1 Product versions ............................................................................................................... 4

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

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

3.1 Configuration Examples ................................................................................................... 7

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

4.1 Mounting the connector module. ...................................................................................... 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

6.1 SDI-CHO-2x1 Command table ....................................................................................... 11

Product Warranty ................................................................................................................. 13

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

A.1 Materials declaration ...................................................................................................... 14

A.2 Recycling information ..................................................................................................... 14

nevion.com | 3

SDI-CHO-2x1/ SDI-CHO-2x1-PB Rev. E

SDI-CHO-2x1

2x1 SD-SDI changeover

SDI-CHO-2x1-PB

2x1 SD-SDI change over with passive bypass

Figure 1 - SDI-CHO-2x1 Serial Digital Video Change-over

1 Product overview

The flashlink SDI-CHO-2x1-PB/SDI-CHO-2x1 is a serial digital video 2x1 change-over
module providing high performance line protection for various signal formats from
1Mbps up to 540Mbps. The unit can be configured to perform cable equalizing and re­clocking of 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 non-latching (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 300 meters of
cable (Belden 8281A at 270Mbps) with a 2 x 1 switch in front of a re-clocker with 4
outputs. The re-clocker supports the bit-rates; 143, 177, 270, 360 and 540Mbps. For
other rates, the re-clocker automatically switches to bypass mode and the SDI-CHO­2x1 will work as a non-re-clocking 2x1 change-over unit with cable equalizer. The SDI­CHO-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 SDI-CHO-2x1 is designed for various line protection applications for studio,
campus, broadcast and telecom. The SDI-CHO-2x1-PB also features a relayed bypass
of both inputs to its respective outputs ensuring signal bypass at power down or card
failure/ upgrade.

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 de-bouncing of the
“signal on main input returns” condition. The primary timer handles de-bouncing of LOS
on both main and standby inputs.

1.1 Product versions

nevion.com | 4

SDI-CHO-2x1/ SDI-CHO-2x1-PB Rev. E

2 Specifications

Electrical Input

Number of inputs: 2
Data rate NRZ: 1 to 540 Mbps
Equalization: Automatic (typical up to 300m Belden
8281A)
Cable reclocker can be bypassed to
support

bit rates down to 1Mbps.
Impedance: 75 ohm
Return loss: >15dB @ 540MHz
Signal level: nom. 800mV
apx. 200mV min. when equalizer switched
to Bypass
Connector: BNC

Electrical Output

Number of outputs: 4
Connector: BNC
Impedance: 75 ohm
Return loss: >15dB @ 540MHz
Jitter: max 0.2UI
Peak to peak signal level: 0.8V 0.1V
Signal polarity 2 outputs non inverting, 2 outputs inverting

Features

Re-clocking: Automatic clock rate detection
Supported clock rates: 143, 177, 270, 360
and 540 Mbps

Electrical

Power: +5V DC / 3W Max.
Control: Control system for access to setup and
module status

With BITE (Built-In Test Equipment) for

use with Multicon Gyda Control System
Supported standards
SMPTE: SMPTE259M, SMPTE305.2M,

SMPTE310M, SMPTE344M
DVB-ASI: EN50083-9

nevion.com | 5