IRT DDA-4006 User manual

4006-dda.ib.rev1.doc Page 1 of 12 10/09/2008
IRT Eurocard Type
DDA-4006
270 Mb/s ASI/SDI 8 O/P
Non-Reclocking Distribution Amplifier
Designed and manufactured in Australia
IRT can be found on the Internet at:
http://www.irtelectronics.com
I R T Electronics Pty Ltd A.B.N. 35 000 832 575
26 Hotham Parade, ARTARMON N.S.W. 2064 AUSTRALIA
National: Phone: [phone] Fax: [phone]
International: [phone] [phone]
Email: [e-mail]
Web: www.irtelectronics.com
IRT Communications
www.irtcommunications.com

4006-dda.ib.rev1.doc Page 2 of 12 10/09/2008
DDA-4006
270 Mb/s ASI/SDI 8 O/P
Non-Reclocking Distribution Amplifier
Instruction Manual
Table of Contents
Section Page
Operational Safety 2
General Description 3
Technical Specifications 4
Installation 5
Link Settings 5
Digital Video Connections 5
Front Panel Indicators 5
SMU-4000 Installation 6
Figure 1: SMU-4000 module 6
Front & rear panel connector diagrams 7
SNMP – What Is It? 8
DDA-4006 SNMP Functions 10
Maintenance & Storage 11
Warranty and Service 11
Equipment return 11
Drawing Index 12
This instruction manual applies to DDA-4006 later than S/N 0806101
Operational Safety:
WARNING
Operation of electronic equipment involves the use of voltages and currents that
may be dangerous to human life. Note that under certain conditions dangerous
potentials may exist in some circuits when power controls are in the OFF position.
Maintenance personnel should observe all safety regulations.
Do not make any adjustments inside equipment with power ON unless proper
precautions are observed. All internal adjustments should only be made by suitably
qualified personnel. All operational adjustments are available externally without the
need for removing covers or use of extender cards.
IRT Communications
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4006-dda.ib.rev1.doc Page 3 of 12 10/09/2008
DDA-4006
270 Mb/s ASI/SDI 8 O/P
Non-Reclocking Distribution Amplifier
General Description
The DDA-4006 270 Mb/s serial digital video distribution amplifier provides the user with a single standard module
to cover a wide range of distribution and monitoring functions for ASI or SDI signals.
Due to the fact that standard loop through techniques used in the analogue domain are unsuitable to the digital
domain most digital equipment comes with no facility to route the input signal to other locations. As a result a DA is
required at almost every point in the digital chain.
Serial digital signals also suffer severe deterioration over relatively short cable distances. The DDA-4006 provides a
means of extending the working distances that can be achieved by equalising and re-transmitting the data mid route.
The DDA-4006 may also be used to provide input equalisation for devices not having this feature, as most
unequalised inputs will only support cable lengths of less than 20 metres.
Frequent re-clocking of serial digital signals can lead to serious increases in jitter with resultant data errors. The
DDA-4006 does not include re-clocking so as to minimise these errors, leaving re-clocking to be done by the
receiving device. For applications requiring reclocking the DDA-4007 should be used.
The rear assembly now includes a bypass relay, to switch the Input (SK1) to Output 1 (SK2) in the event of a power
failure, as standard.
An optional Simple Network Management Protocol (SNMP) plug-in module is available for remote monitoring of
input status and alarm state.
The DDA-4006 is designed to fit IRT’s Standard Eurocard frame as well as IRT’s 4000 series frame for use with
IRT’s SNMP system and may be used alongside any other of IRT’s analogue or digital Eurocards.
Features:
• For use as buffer or distribution amplifier.
• 8 in-phase 270 Mb/s ASI or SDI reclocked outputs.
• Automatic input equalisation to 250 metres.
• Automatic output muting on no input.
• Relay bypass on loss of power.
• Front panel indicators provide monitoring of presence of input signal at 270 Mb/s.
• Optional plug-in SNMP monitoring module.
O/P 2
O/P 3
O/P 4
O/P 5
O/P 6
O/P 7
O/P 8
OUTPUTS
EQUALISER
SIGNAL FAIL
DETECTION
INPUT
Relay RL 1 = Output Alarm
LINK
ALARM O/P
RL 1
BLOCK DIAGRAM DDA-4006 SIGNAL PATH
O/P 1
MON O/P
Relay Bypass on loss of power
RL1
SNMP
IRT Communications
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4006-dda.ib.rev1.doc Page 4 of 12 10/09/2008
Technical Specifications
DDA-4006
Input:
Number 1.
Impedance 75 Ohm.
Return loss >15 dB 5 MHz to 270 MHz.
Equalisation Automatic, better than 250 metres at 270 Mb/s for Belden 8281 or
equivalent cable (reduces to approx. 200m when LK2 is closed).
Outputs:
Number 8 ASI or SDI plus one front panel monitoring output.
Signal level 800 mV ± 10%.
Impedance 75 Ohm.
Return loss >15 dB 5 MHz to 270 MHz.
DC offset Nil.
Performance:
Output rise time <1 ns, (700 ps typically).
Residual Jitter <0.1 UI (measured with up to 300m of Belden 8281 or equivalent cable).
Connectors: BNC.
Indicators:
Power LED (green) for +5 Vdc.
Signal present LED (green) when signal present.
Power requirement:
Voltage 28 Vac CT (14-0-14) or ±16 Vdc.
Consumption 2.0 VA.
General:
Temperature range 0 - 50° C ambient.
Mechanical Suitable for mounting in IRT 19" rack chassis with input, output and power
connections on the rear panel.
Dimensions 6 HP x 3U Extended Eurocard (220 mm x 100 mm).
Weight With rear assembly 340g.
Finish: Front panel Grey background, silk-screened black lettering & red IRT logo.
Rear assembly Detachable silk-screened PCB with direct mount connectors to Eurocard and external
signals.
Supplied accessories Rear connector assembly with matching connector for alarm outputs.
Optional accessories SMU-4000 SNMP plug-in module for use with 4000 series frame fitted with SNMP
“Agent”.
Due to our policy of continuing development, these specifications are subject to change without notice.
IRT Communications
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4006-dda.ib.rev1.doc Page 5 of 12 10/09/2008
Installation
Pre-installation:
Handling:
This equipment may contain or be connected to static sensitive devices and proper static free handling precautions
should be observed.
Where individual circuit cards are stored, they should be placed in antistatic bags. Proper antistatic procedures
should be followed when inserting or removing cards from these bags.
Power:
AC mains supply: Ensure that operating voltage of unit and local supply voltage match and that correct rating
fuse is installed for local supply.
DC supply: Ensure that the correct polarity is observed and that DC supply voltage is maintained within
the operating range specified.
Earthing:
The earth path is dependent on the type of frame selected. In every case particular care should be taken to ensure
that the frame is connected to earth for safety reasons. See frame manual for details.
Signal earth: For safety reasons a connection is made between signal earth and chassis earth. No attempt should be
made to break this connection.
Installation in frame or chassis:
See details in separate manual for selected frame type.
Link Settings:
LK1 is factory set for a contact make to ground on signal failure at SK10 pin 2 on the rear panel, move LK1 from
the normally closed (N/C) to the normally open (N/O) position for a break to ground on signal or power loss.
Link LK2 closed reduces the input equalisation to 200m for use in noisy environments or when a short input cable
is used.
Digital Video Connections:
Input and outputs are 75 ΩBNC type for connection with high quality 75 Ωcoaxial cable. Input is self-terminating.
Front Panel Indicators:
The presence of 270 Mb/s locked signal is indicated by the ‘SIGNAL PRESENT’ front panel LED (green).
The presence of the internal +5 Vdc supply is indicated by the front panel LED (green).
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4006-dda.ib.rev1.doc Page 6 of 12 10/09/2008
SMU-4000 Installation
The SMU-4000 plug-in SNMP management controller module can only be fitted to IRT’s 4000 series modules that
are capable of being SNMP upgradeable. To determine whether a module is SNMP upgradeable, a square section
on the main PCB is silk screened and fitted with three multipin sockets – as shown below:
This is where the SMU-4000 plug-in SNMP management controller module is fitted. The three sets of multipins on
the underside of the SMU-4000 line up with the three sets of multipin sockets on the main PCB module. Align all
pins and then gently press the SMU-4000 all the way down into place.
If the SMU-4000 is not already programmed with the correct firmware to match the module that it is being plugged
into, it then needs to be programmed via the pins on the topside of the SMU-4000.
Note that installation will generally be done by IRT Electronics at the time of ordering.
Note also that an SMU-4000 will only be functionally operational when the main module that it is plugged into is
fitted into an IRT 4000 series frame fitted with a CDM-4000 SNMP agent and being interrogated by a suitable
Network Management System.
1J2
1J1 1J3
Figure 1: SMU-4000 module
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4006-dda.ib.rev1.doc Page 7 of 12 10/09/2008
SIGNAL
PRESENT
OUTPUT MON
DC
DDA-4006
N140
Front & rear panel connector diagrams
The following front panel and rear assembly drawings are not to scale and are intended to show relative positions of
connectors, indicators and controls only.
SK10 2 = Alarm
SK10 1 = Gnd
2
1
SK10
OUTPUTS
PL 5 OUT
INPUT
SK8 PL2
SK2
SK7
SK6
SK4
SK3
SK5
PL1
SK9
SK1
POWER OFF
BYPASS
SK1-SK2
IRT Communications
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4006-dda.ib.rev1.doc Page 8 of 12 10/09/2008
SNMP
What Is It?
SNMP stands for Simple Network Management Protocol. It is an application layer protocol for managing IP
(Internet Protocol) based systems. SNMP enables system administrators to manage system performance, and to find
and solve system problems. SNMP runs over UDP (User Datagram Protocol), which in turn runs over IP.
Three types of SNMP exist: SNMP version 1 (SNMPv1), SNMP version 2 (SNMPv2) and SNMP version 3
(SNMPv3). It is not the intention here to discuss the differences between various versions, only to bring attention to
the fact that IRT Electronics modules, fitted with SNMP capability, use SNMPv1.
An SNMP managed network consists of three key components: Network Management Systems (NMS), agents, and
managed devices.
An NMS is the console through which the network administrator performs network management functions, such as
monitoring status (e.g. alarm states) and remote controlling, of a set of managed devices. One or more NMSs must
exist on any managed network. Generally the NMS is a computer running third party SNMP control software. There
are a number of third party SNMP software applications currently available on the market.
An NMS polls, or communicates with, an agent. An agent is a network management software module that resides in
a managed device. An agent has local knowledge of management information and translates that information into a
form compatible with SNMP. The agent, therefore, acts as an interface between the NMS and the managed devices.
The NMS sends a request message, and control commands for the managed devices, to the agent, which in turn
sends a response message, containing information about the managed devices, back to the NMS.
A managed device contains an SNMP agent and resides on a managed network. Managed devices collect and store
management information and make this information available to NMSs using SNMP.
Managed device agent variables are organised in a tree structure known as a Management Information Base (MIB).
Within the MIB are parameters pertaining to the managed device. An Object Identifier (OID) number within the
MIB defines the managed device type. This is a unique number specific to the model of managed device. Other
information relating to the device is also stored, information such as alarm states, controllable settings, etc. The MIB
tree is organised in such a way that there will be no two MIB files with conflicting placements.
Normally an NMS polls an agent for information relating to the MIB in a managed device to be sent back to the
NMS. When certain conditions are met within the MIB, such as major alarm conditions, for example, the agent
automatically sends what is known as a trap to the NMS without any prompting from the NMS. This allows
automatic notification of a predetermined event.
NMS
NMS
IP
Network
MIB
SNMP Agent
Protocol Engine SNMP Agent
MIB
SNMP Agent
Protocol Engine SNMP Agent
MIB
SNMP Agent
Protocol Engine SNMP Agent
SNMP Block Diagram
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4006-dda.ib.rev1.doc Page 9 of 12 10/09/2008
SNMP with IRT Products
IRT Electronics currently employs SNMPv1 with its 4000 series frame. The frame acts as an agent when fitted with
a CDM-4000 module. This module has its own designated slot next to the power supply so as to not affect the
number of modules that the frame will take. Communication between the NMS, the frame and its loaded modules
are via this CDM-4000 module. Note that the NMS software is third party and not supplied by IRT Electronics.
Ethernet connection for SNMP operation is via an RJ45 connector on the rear of the frame, below the mains inlet.
Ethernet rate runs at either 10 baseT or 100 baseT.
Frame parameters, such as Name, Address and Location, are set via an RS232 interface, a D9 connector on the rear
of the frame below the mains inlet. A software terminal emulator, such as Tera Term or HyperTerminal, is used for
setting and reading the parameters of the frame.
IRT modules that are SNMP compatible need a plug-in SMU-4000 module with a program relevant to the module
that it is plugged into. Depending on the module, besides the module identification, parameters such as alarm states,
inputs and controls etc. are communicated to the CDM-4000 agent via a data bus on the rear of the frame. Thus the
CDM-4000 collects information on what is loaded within the frame, what positions they occupy, and their current
status for communication to the NMS when the NMS sends a request for information.
In the event of a major alarm from any of the SNMP compatible modules, or power supplies, a trap is automatically
sent by the CDM-4000 agent to the NMS without any prompting by the NMS. This alerts the operator to any fault
conditions that may exist that need immediate attention.
FRU-4000
FRAME
110/240 V 50/60 Hz
0.7 A (max.)
FUSES
110/120 Vac
1A S.B.
220/240 Vac
500 mA S.B.
AS3260 approval no.: CS6346N
Ass. no.: 804692
+-
48Vdc
Alarm
RS232
Ethernet
IRT SNMP Connections
IRT modules fitted
with SMU-4000 PSU’s
CDM-4000
IRT 4000 Series Frame
IRT 4000 Series Frame
IRT modules fitted
with SMU-4000 PSU’s
CDM-4000
IP
Network Ethernet Cable
Ethernet Cable
Ethernet Cable
NMS
IRT 4000 Series SNMP Setu
p
IRT Communications
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4006-dda.ib.rev1.doc Page 10 of 12 10/09/2008
DDA-4006 SNMP Functions:
With the DDA-4006 fitted with the optional plug-in SMU-4000 SNMP module, programmed with firmware to suit,
and installed in an IRT 4000 series frame with SNMP capability, it is possible to remotely monitor the presence of
an input and the state of the urgent alarm using an NMS. Traps can also be set for whenever an urgent alarm occurs
or clears.
IRT Communications
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4006-dda.ib.rev1.doc Page 11 of 12 10/09/2008
Maintenance & Storage
Maintenance:
No regular maintenance is required.
Care however should be taken to ensure that all connectors are kept clean and free from contamination of any kind.
This is especially important in fibre optic equipment where cleanliness of optical connections is critical to
performance.
Storage:
If the equipment is not to be used for an extended period, it is recommended the whole unit be placed in a sealed
plastic bag to prevent dust contamination. In areas of high humidity a suitably sized bag of silica gel should be
included to deter corrosion.
Where individual circuit cards are stored, they should be placed in antistatic bags. Proper antistatic procedures
should be followed when inserting or removing cards from these bags.
Warranty & Service
Equipment is covered by a limited warranty period of three years from date of first delivery unless contrary
conditions apply under a particular contract of supply. For situations when “No Fault Found” for repairs, a
minimum charge of 1 hour’s labour, at IRT’s current labour charge rate, will apply, whether the equipment is within
the warranty period or not.
Equipment warranty is limited to faults attributable to defects in original design or manufacture. Warranty on
components shall be extended by IRT only to the extent obtainable from the component supplier.
Equipment return:
Before arranging service, ensure that the fault is in the unit to be serviced and not in associated equipment. If
possible, confirm this by substitution.
Before returning equipment contact should be made with IRT or your local agent to determine whether the
equipment can be serviced in the field or should be returned for repair.
The equipment should be properly packed for return observing antistatic procedures.
The following information should accompany the unit to be returned:
1. A fault report should be included indicating the nature of the fault
2. The operating conditions under which the fault initially occurred.
3. Any additional information, which may be of assistance in fault location and remedy.
4. A contact name and telephone and fax numbers.
5. Details of payment method for items not covered by warranty.
6. Full return address.
7. For situations when “No Fault Found” for repairs, a minimum charge of 1 hour’s labour will apply,
whether the equipment is within the warranty period or not. Contact IRT for current hourly rate.
Please note that all freight charges are the responsibility of the customer.
The equipment should be returned to the agent who originally supplied the equipment or, where this is not
possible, to IRT direct as follows.
Equipment Service
IRT Electronics Pty Ltd
26 Hotham Parade
ARTARMON
N.S.W. 2064
AUSTRALIA
Phone: [phone] Fax: [phone]
Email: [email protected]
IRT Communications
www.irtcommunications.com

4006-dda.ib.rev1.doc Page 12 of 12 10/09/2008
Drawing Index
Note: Components marked n/c on the diagrams are optional and are not included on standard production units. They
are shown to assist with interpretation of additional or optional functions, which may be included or are necessary
for factory set-up procedures.
Drawing # Sheet # Description
804936 1 DDA-4006 Circuit Schematic
IRT Communications
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Title
SCALE
SIZE
Sheet
DRAWN CHECKED ENG. APP. Revision:
DO NOT COPY NOR
DISCLOSE TO ANY
THIRD PARTY
WITHOUT WRITTEN
CONSENT
of1
IRT Electronics Pty. Ltd.
Drawing No.
COPYRIGHT
ARTARMON NSW AUSTRALIA 2064
A3
N.T.S. 4
DDA-4006
804936
Date: 3
10-Sep-2008
SDI/ASI Distribution Amplifier
K.N.
1 15-04-2004
PCB 804937
R1-R9 = 68R L1-L11 = 15nH
Input
Output 8 Output 7 Output 1 Output 6 Output 2 Output 5 Output 4 Output 3Carrier Detect
+5V GND Monitor O/P
Input Equaliser and Output Drivers
804936i3s2.sch
AC 1 AC 4 AC 2 AC 3
+5V GND
Power Supply Circuit
804936i3s3.sch
3 1
2
LK1
'DC' 'grn'
21
R36
680R
+5V
n.c. n.o.
1A 1B 2A 2B 3A 3B 4A 4B 5A 6A 6B 7A 7B 8A 8B
10A 10B
5B
11A 11B 12A 12B 13A 13B 14A 15A 15B 17A 17B 18A 18B
9A 9B
20A 20B 14B 21A 21B 22A 22B 23A 24B 24A 25B 26A 27A 27B 28A 23B 19A 19B 30A 30B 26B 31A 31B 32A 32B 25A 16A 16B 28B 29A 29B
P1
DIN64RA
21
LD1
HLMP-1503
21 R6
10K
1 2
C11
100nF
+5V
+5V
+5V
MON. O/P
'SIGNAL' 'grn'
21
R35
680R
21
LD2
HLMP-1503
+5V
ALARM CIRCUIT
CONTACT CLOSURE (OR BREAK)
TO GROUND ON ALARM, AS SET BYLK1
32
1
Q1
BSS123
1 2
C33
4u7
38
RL1A
V23026 10
1
5RL1B
+5V
1 2
F5
RXE020
POLYFUSE
1 3
2
D2
BAS16
12C39
10nF
1 2
C40
10nF
ALARM
RX
TXCD
RELAY RA
Control Interface
804936i3s4.sch
GNDA
1 2
C41
10nF
2 03-04-2008 ECR1853
2 1
R41 22R
SK101
3 26-06-2008 ECR1863
1A 1B 2A 2B 3A 3B 4A 4B 5A 6A 6B 7A 7B 8A 8B 10A 10B 5B 11A 11B 12A 12B 13A 13B 14A 15A 15B 17A 17B 18A 18B 9A 9B 20A 20B 14B 21A 21B 22A 22B 23A 24B 24A 25B 26A 27A 27B 28A 23B 19A 19B 30A 30B 26B 31A 31B 32A 32B 25A 16A 16B 28B 29A 29B
J1
DIN64
OUTPUTS
1 2
L9R
1 2
L8R
1 2
L7R
1 2
L5R
1 2
L3R
1 2 L10R 15nH INPUT
21 R9R 21 R8R 21 R5R 21 R7R 21 R3R
21
R10R 39R
SK1 SK2
SK3 SK5 SK7 SK8 SK9
2 1
SK10
1 2 3J2
1 2 3 4 5 6
P3
1 3 5 7 9P2
TX RX
1
3
2
45
7
6
8
RL1R
RELAY G6K-2F-RF
1 2
L1R 15nH
21 R1R
68R
1 2
L11R 15nH
21
R11R 68R
1 2
L4R
21 R4R SK4
1 2
L6R
21 R6R SK6
J1/32A
J1/32A
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