IRT Electronics MMM-4230 User manual

4230-mmm & 4230-mmx.ib.rev4.doc Page 1 of 17 17/10/2007
IRT Eurocard
Types MMM-4230 & MMX-4230
4 Channel ASI to G.703 Multiplexer / De-Multiplexer
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
Designed and manufactured in Australia
IRT can be found on the Internet at:
http://www.irtelectronics.com

4230-mmm & 4230-mmx.ib.rev4.doc Page 2 of 17 17/10/2007
IRT Eurocard
Types MMM-4230 & MMX-4230
4 Channel ASI to G.703 Multiplexer/De-Multiplexer
Instruction Book
Table of Contents
Section Page
Operational Safety 2
General Description 3
Technical Specifications 4
Configuration 5
Link settings 5
Switch settings 6
45 Mb version 6
Variable Bandwidth – Channel Allocation Selection A 7
34 Mb version 8
Installation 9
SMU-4000 Installation 10
Figure 1: SMU-4000 module 10
RS-422 pin assignments 11
The RS-422 standard 12
Front and rear layouts 13
SNMP – What Is It? 14
Maintenance & Storage 16
Warranty & Service 16
Equipment return 16
Drawing List Index 17
This instruction book applies to units later than S/N 0504001.
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.

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IRT Eurocard
Types MMM-4230 & MMX-4230
4 Channel ASI to G.703 Multiplexer/De-Multiplexer
General Description
The MMM-4230 and MMX-4230 are part of a family of data transcoders for converting between the commonly
used MPEG2 Transport Stream formats for video distribution in the broadcast industry.
With the MMM-4230 up to four ASI and one RS422 data signals can be multiplexed together and converted into a
framed or unframed DS3 signal for transmission down a single 45 Mb/s G.703 line.
The MMX-4230 converts and demultiplexes the 45 Mb/s G.703 signal back into the original four ASI signals (at
their original rates) and the RS422 data signal.
An on board switch on the MMM-4230 sets the maximum data rates for each ASI input allowing the efficient use of
the available bandwidth and for protection against overuse of the bandwidth by the other channels. Total maximum
data rate up to 43.5 Mb/s is allowed. Temporary packet stuffing is used to automatically bring the rate up to
45 Mb/s.
Inputs are automatically equalised for lengths of up to 300m of Belden 8281 or equivalent cable.
RS422 9600 Baud uni-directional data may also be sent on the same link.
Front panel indication and relay alarm on the MMM-4230 transmitter shows if there is an input data rate violation.
Corresponding alarm on the MMX-4230 receiver shows a loss of G.703 input.
An optional Simple Network Management Protocol (SNMP) plug-in module is available for remote monitoring of
input and output status, control and alarm states.
The MMM-4230 and MMX-4230 are designed to fit IRT’s standard Eurocard frames 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.
Note: Also available in a 34 Mb/s G.703 version. See “Configuration - switch settings” section for configuration
table.
Standard features:
• Up to 4 ASI and 1 Data stream on one 45 Mb/s G.703 link
• Input rate stuffing to 45 Mb/s G.703 rate
• Selectable input maximum data rates
• Automatic Input equalisation up to 300m
• Suitable for Single Frequency Network (SFN) use
• Optional SNMP plug-in monitoring and control module
• Eurocard format
MMM-4230 MM
X
-4230
Mux
&
Signal
Processing
ASI-1
Input
G.703
Output
ASI-2
Input
ASI-3
Input
DATA
Input
Processing
&
De-Mux
ASI-1
Output
G.703
Input
ASI-2
Output
ASI-3
Output
DATA
Output
ASI-4
Output
ASI-4
Input
SNMP SNMP

4230-mmm & 4230-mmx.ib.rev4.doc Page 4 of 17 17/10/2007
Technical Specifications
MMM-4230:
Inputs:
Type 1 4 x ASI-C 75Ω, 800 mVp-p, BNC connector.
Maximum Data Rate 40.1 Mb/s (for 188 byte packet),
43.5 Mb/s (for 204 byte packet).
Channel Data Rate Assignments I/P1 I/P2 I/P3 I/P4 (Mb/s)
(for 188 byte packet length signals) 40 + 0 + 0 + 0
35 + 5 + 0 + 0
30 + 10 + 0 + 0
25 + 15 + 0 + 0
20 + 20 + 0 + 0
30 + 5 + 5 + 0
25 + 10 + 5 + 0
20 + 15 + 5 + 0
20 + 10 + 10 + 0
13.5 + 13.5 +13.5 + 0
Variable
20 + 10 + 5 + 5
15 + 15 + 5 + 5
15 + 10 + 10 + 5
10 + 10 + 10 + 10
Type 2 RS422 9600 Baud Uni directional.
Output:
Type 1 x G.703, 75ΩBNC connector.
Electrical Characteristics B3ZS encoded.
Data Rate 44.736 Mb/s.
Alarm Output: Contact closure on error, loss of power.
MMX-4230:
Input:
Type 1 x G.703, 75ΩBNC connector.
Electrical Characteristics B3ZS encoded.
Data Rate 44.736 Mb/s.
Outputs:
Type 1 4 x ASI-C 75Ω, 800 mVp-p, BNC connector.
Data Rate same as MMM-4230 input rate.
Type 2 RS-422 9600 Baud Uni directional.
Alarm Output: Contact closure on loss of G.703 input, loss of power.
Power Requirements 28 Vac CT (14-0-14) or ±16 Vdc.
Power consumption 6.5 VA.
Other
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.
Finish Front panel Grey, silk-screened black lettering & red IRT logo.
Rear assembly Detachable silk-screened PCB with direct mount connectors to Eurocard and
external signals.
Dimensions 6 HP x 3 U x 220 mm IRT Eurocard.
Optional Accessories SNMP plug-in module for use with 4000 series frame fitted with SNMP
“Agent”.
NOTE: Also available in a 34 Mb/s G.703 version.
Due to our policy of continuing development, these specifications are subject to change without notice.

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Configuration
Link settings
MMM-4230 CONFIGURATION INFORMATION
Program 4230mmm.tdf LK6A Installed
LK1 IN When using Switch 1 position A ‘Variable Bandwidth’, if the frequency of an input that has an
assignment of 26.8Mb/s falls below 13.4Mb/s then the assignment will revert to 13.4Mb/s. All other
conditions mentioned in the Variable Bandwidth section still apply.
OUT The frequency resetting mentioned above does not occur.
LK2 IN Existing Reed Solomon encoding on ASI streams will pass through system.
If no RS is present on the input then RS encoding is added.
OUT Reed Solomon encoding added to input ASI steams regardless of whether existing RS encoding exists
or not.
LK3 Not used.
LK4*IN Output G.703 signal will be “framed”.
OUT Output G.703 signal will be “unframed”.
LK5*IN Output “unshaped” (recommended for output drive lengths > 68m (225ft)).
OUT Output “shaped” (recommended for output drive lengths < 68m (225ft)).
LK7 Installing this link will terminate the RS-422 data line.
Note: * Not applicable for 34 Mb/s (E3) version.
MMX-4230 CONFIGURATION INFORMATION
LK1 IN Allows instantaneous changes in channel bandwidth allocation as required by the “Variable” Data
Assignment.
OUT Error concealment is applied to the packet distribution.
LK2 IN Output packet size is always 204 byte and will contain Reed Solomon code regardless of
corresponding MMM-4230 input packet size.
OUT Output packet size matches that of corresponding MMM-4230 input packet size.
LK3 IN Outputs can be individually disabled by SNMP remote control. Note that this requires SNMP
functionality within IRT’s SNMP frame.
OUT All outputs are always enabled. SNMP functionality not required.
LK4*IN For input G.703 signal that is “framed”.
OUT For input G.703 signal that is not “framed”.
LK5 IN Input G.703 equaliser not enabled.
OUT Input G.703 equaliser enabled.
LK10 Installing this link will terminate the RS-422 data line.
Note: * Not applicable for 34 Mb/s (E3) version.

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Switch settings
MMM-4230 45Mb version:
The MMM-4230 Multiplexer works in a channel protection mode. The necessity for protection arises if the data rate
of the inputs exceeds the maximum allowable for an MMM-4230 Transmitter (43.5Mb/s). Without protection all
used channels would suffer errors. With protection, the available data rate can be divided among the input channels
and if a channel tries to exceed its allocation only that channel is adversely affected.
A switch, SW1, on the MMM-4230 sets the maximum data rates for each ASI input.
For 204 byte packets the following allocation is possible.
Channel Data Rate Assignment
Switch 1 Position I/P 1 I/P 2 I/P 3 I/P 4
0 43.5 - - -
1 38.26 5.46 - -
2 32.8 10.93 - -
3 27.33 16.4 - -
4 21.86 21.86 - -
5 32.8 5.46 5.46 -
6 27.33 10.93 5.46 -
7 21.86 16.4 5.46 -
8 21.86 10.93 10.93 -
9 14.6 14.6 14.6 -
A Variable
B 21.86 10.93 5.46 5.46
C 16.4 16.4 5.46 5.46
D 16.4 10.93 10.93 5.46
E 10.93 10.93 10.93 10.93
F Remote
For 188 byte packets the following is true –
Channel Data Rate Assignment
Switch 1 Position I/P 1 I/P 2 I/P 3 I/P 4
0 40.10 - - -
1 35.26 5.03 - -
2 30.22 10.07 - -
3 25.18 15.11 - -
4 20.14 20.14 - -
5 30.22 5.03 5.03 -
6 25.18 10.07 5.03 -
7 20.14 15.11 5.03 -
8 20.14 10.07 10.07 -
9 13.47 13.47 13.47 -
A Variable
B 20.14 10.07 5.03 5.03
C 15.11 15.11 5.03 5.03
D 15.11 10.07 10.07 5.03
E 10.07 10.07 10.07 10.07
F Remote
Note: For Channel allocation selection by SNMP control the Data Rate switch (SW1) must be set to “F”.
These data rates are only the maximum allowed for the channel. Any lower rate may be used.
SW1

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Variable Bandwidth – Channel Allocation Selection A:
For 188 byte packets the following allocation is possible –
Channel Data Rate Assignment
I/P 1 I/P 2 I/P 3 I/P 4
40.2 - - -
26.8 13.4 - -
26.8 - 13.4 -
26.8 - - 13.4
13.4 13.4 13.4 -
13.4 13.4 - 13.4
13.4 - 13.4 13.4
- 40.2 - -
13.4 26.8 - -
- 26.8 13.4 -
- 26.8 - -
- 13.4 13.4 13.4
- - 40.2 -
13.4 - 26.8 -
- 13.4 26.8 -
- - 26.8 13.4
- - - 40.2
13.4 - - 26.8
- 13.4 - 26.8
If only one channel is present then the total bandwidth is allocated to that channel.
If two channels are present and one exceeds a rate of 13.4 Mb/s then that channel will be assigned 26.8 Mb/s and
the other 13.4 Mb/s. However, input 1 has priority over inputs 2, 3, & 4, input 2 has priority over inputs 3 & 4, and
input 3 has priority over input 4. So even if, say, channel 2 has an input rate above 13.4 Mb/s and then input 1’s rate
also increases above 13.4 Mb/s, then input 1 will be assigned the bandwidth of 26.8 Mb/s whilst input 2’s will be
relegated to 13.4 Mb/s. Once a channel has been assigned a bandwidth of 26.8Mb/s it will retain the allocation until
either its input signal is removed, or until a channel with higher priority requires 26.8Mb/s allocation, or there are
any three channels connected.
If three channels are present they will each be assigned 13.4 Mb/s.
If four channels are present then channel 4 will not get any bandwidth.
The error concealment in the MMX-4230 will not allow an instantaneous change in channel allocation, so this
should be disabled when using the above option by installing link LK1.

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MMM-4230 34Mb version:
Maximum payload Data Rate 30.86 Mb/s (for 188 byte packet),
33.5 Mb/s (for 204 byte packet).
Channel Data Rate Assignments I/P1 I/P2 I/P3 I/P4 (Mb/s)
(for 188 byte packet length signals) 30 + 0 + 0 + 0
27 + 3.8 + 0 + 0
23 + 7.7 + 0 + 0
19 + 11.5 + 0 + 0
15.4 + 15.4 + 0 + 0
23 + 3.8 + 3.8 + 0
19 + 7.7 + 3.8 + 0
15.4 + 11.5 + 3.8 + 0
15.4 + 7.7 + 7.7 + 0
11.5 + 11.5 + 7.7 + 0
19 + 3.8 + 3.8 + 0
15.4 + 7.7 + 3.8 + 3.8
11.5 + 11.5 + 3.8 + 3.8
11.5 + 7.7 + 7.7 + 3.8
7.7 + 7.7 + 7.7 + 7.7
In particular, for 204 byte packets the following allocation is possible.
Channel Data Rate Assignment
Switch 1 Position I/P 1 I/P 2 I/P 3 I/P 4
0 33.5 - - -
1 29.31 4.18 - -
2 25.12 8.37 - -
3 20.93 12.56 - -
4 16.75 16.75 - -
5 25.12 4.18 4.18 -
6 20.93 8.37 4.18 -
7 16.75 12.56 4.18 -
8 16.75 8.37 8.37 -
9 12.56 12.56 8.37 -
A 20.93 4.18 4.18 -
B 16.75 8.37 4.18 4.18
C 12.56 12.56 4.18 4.18
D 12.56 8.37 8.37 4.18
E 8.37 8.37 8.37 8.37
F Remote
And for 188 byte packets the following is true –
Channel Data Rate Assignment
Switch 1 Position I/P 1 I/P 2 I/P 3 I/P 4
0 30.86 - - -
1 27.00 3.85 - -
2 23.14 7.71 - -
3 19.28 11.57 - -
4 15.43 15.43 - -
5 23.14 3.85 3.85 -
6 19.28 7.71 3.85 -
7 15.43 11.57 3.85 -
8 15.43 7.71 7.71 -
9 11.57 11.57 7.71 -
A 19.28 3.85 3.85 -
B 15.43 7.71 3.85 3.85
C 11.57 11.57 3.85 3.85
D 11.57 7.71 7.71 3.85
E 7.71 7.71 7.71 7.71
F Remote
Note: For Channel allocation selection by SNMP control the Data Rate switch (SW1) must be set to “F”.
These data rates are only the maximum allowed for the channel. Any lower rate may be used.

4230-mmm & 4230-mmx.ib.rev4.doc Page 9 of 17 17/10/2007
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.
Signal Connections:
All ASI & G.703 inputs and outputs are by 75ΩBNC connectors.
Alarm output is via a two-pin 0.1” header. Alarm condition is when there is a short between these two pins. This
corresponds to either a loss of power or if there is an input data rate violation on the MMM-4230, or a loss of power
or a loss of G.703 input on the MMX-4230.
RS-422 data input and output connections are made via HE-14 8 pin double row connectors on both the MMM-
4230 and the MMX-4230.
SNMP:
When used in an IRT FRU400 Frame with a CDM400 SNMP Module fitted, the MMM-4320 and MMX-4320 can
be interrogated by an SNMP Network Management System and certain functions can also be remotely controlled.
For instance, the channel bandwidth assignment can be altered and any the RS errors that have occurred can be
read.
SNMP Traps on alarm states can be optionally sent.
The MIB (management information base) associated with these devices has the following OIDs (Object Identies):
Alarms
Channel Present
Channel Enabled
Channel Measured Data Rate
Channel Rate Alarm Channel
Channel Packet size
Bandwidth Allocation
Framing
FPGA Version
Reset
Trap Enable
RS Errors

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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

4230-mmm & 4230-mmx.ib.rev4.doc Page 11 of 17 17/10/2007
RS-422 pin assignments
Connectors viewed from top.
RB
RA
MMM-4230
TB
TA
MMX-4230

4230-mmm & 4230-mmx.ib.rev4.doc Page 12 of 17 17/10/2007
The RS-422 Standard
The RS-422 standard introduced in the early 1970s defines a balanced (or differential) data communications
interface using two separate wires for each signal. Due to the high noise immunity of the RS-422 standard, high
data speeds and long distances can be achieved.
The RS-422 specification allows reliable serial data communications for:
• Distances up to 1200 metres
• Data rates of up to 10 Mb/s
Only one line driver is allowed on a line, and up to ten line receivers can be driven by it. Figure 1.1 illustrates RS-
422.
(Ref: IDC Engineers Pocket Guide)
A(+)
B(-)
Com
Line Driver Line Receiver
A(+)
B(-)
Com
10
1 2 9
RS-422
Transmitter RS-422
Receiver
Balanced Line with
Differential Volta
g
es
(-5V to +5V)
Up to 1200 metres
RS-422 Receivers (up to 10 devices)
Figure 1.1: RS-422 Connection

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Front & rear panel connector diagrams
The following front panel and rear assembly drawings are not to scale and are intended to show connection order
and approximate layout only.
G.703 OUT
INPUT 1
INPUT 2
INPUT 3
RS-422
URGENT
ALARM
INPUT 4
G.703 IN
OUTPUT 1
OUTPUT 2
OUTPUT 3
RS-422
URGENT
ALARM
OUTPUT 4
ALARM
DC
N140
DATA
ASI 3
ASI 4
ASI 2
ASI 1
MMX-4230
ALARM
DC
N140
DATA
ASI 3
ASI 4
ASI 2
ASI 1
MMM-4230

4230-mmm & 4230-mmx.ib.rev4.doc Page 14 of 17 17/10/2007
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

4230-mmm & 4230-mmx.ib.rev4.doc Page 15 of 17 17/10/2007
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
Network Ethernet Cable
Ethernet Cable
Ethernet Cable
NMS
IRT 4000 Series SNMP Setu
p

4230-mmm & 4230-mmx.ib.rev4.doc Page 16 of 17 17/10/2007
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]

4230-mmm & 4230-mmx.ib.rev4.doc Page 17 of 17 17/10/2007
Drawing List Index
Drawing # Sheet # Description
804900 1 MMM-4230 4 Channel ASI to G.703 Multiplexer Schematic – sheet 1
804900 2 MMM-4230 4 Channel ASI to G.703 Multiplexer Schematic – sheet 2
804900 3 MMM-4230 4 Channel ASI to G.703 Multiplexer Schematic – sheet 3
804902 1 MMX-4230 G.703 to 4 Channel ASI De-Multiplexer schematic – sheet 1
804902 2 MMX-4230 G.703 to 4 Channel ASI De-Multiplexer schematic – sheet 2
804902 3 MMX-4230 G.703 to 4 Channel ASI De-Multiplexer schematic – sheet 3

SCALE Sheet
DO NOT COPY NOR
DISCLOSE TO ANY
THIRD PARTY
WITHOUT WRITTEN
CONSENT
of
IRT Electronics Pty. Ltd.
Drawing No.
COPYRIGHT
ARTARMON NSW AUSTRALIA 2064
N.T.S. 804900
Revision: Date: 1
1-Feb-2005
Title MMM-4230SIZE
A2
CHECKED ENG.APR. DRAWN
13
CHA_IN[8] CHA_IN[9]
INA-
1
INA+
2
A/!B
3
!BISTEN
4
INB+
28
INB-
27
MODE
26
REFCLK 25 RF
5
GND
6
!RDY
7
GND
8
Vccn
9
Qj (RVS)
10
Qh (Q7)
11
Qg (Q6) 12
Qf (Q5) 13
Qe (Q3) 15
Qi (Q4) 14
Qd (Q2) 16 Qc (Q1) 17 Qb (Q0) 18
Qa (SC/!D) 19
GND 20
Vccq 21
CKR 22
SO 23
Vccq 24
U3
CY7B933
Vcc
1
Vcc
2
EOM
3
Vcc
4
CD
5
AEC+
6
AEC-
7
!DO 14
DO 13
!MUTE 12
Vee 11 Vee 10
!DI 9
DI 8
U2
CLC014 R6
75R
R5 75R
D1
BAS32L
+5VB
+5VB
C4
100pF R3
120R C3
0.1uF
C1
0.1uF R2
100R
R1 75R
L1
0.022uH
Input-1
+5VB +5VB
+5VB
CHA_IN[7] CHA_IN[6] CHA_IN[5] CHA_IN[4] CHA_IN[3] CHA_IN[2] CHA_IN[1] CHA_IN[0] CHA_CKR CHA_REF_CLK CHA_PRES
R4 10K
CD11 10uF
CD12
0.1uF
CD13
0.1uF
CD14
0.1uF
CHB_IN[8] CHB_IN[9]
INA-
1
INA+
2
A/!B
3
!BISTEN
4
INB+
28
INB-
27
MODE
26
REFCLK 25 RF
5
GND
6
!RDY
7
GND
8
Vccn
9
Qj (RVS)
10
Qh (Q7)
11
Qg (Q6) 12
Qf (Q5) 13
Qe (Q3) 15
Qi (Q4) 14
Qd (Q2) 16 Qc (Q1) 17 Qb (Q0) 18
Qa (SC/!D) 19
GND 20
Vccq 21
CKR 22
SO 23
Vccq 24
U5
CY7B933
Vcc
1
Vcc
2
EOM
3
Vcc
4
CD
5
AEC+
6
AEC-
7
!DO 14
DO 13
!MUTE 12
Vee 11 Vee 10
!DI 9
DI 8
U4
CLC014 R12
75R
R8 75R
D2
BAS32L
+5VB
+5VB
C10 100pF
R11 120R C8
0.1uF
C9
0.1uF R10
100R
R14 75R
L2
0.033uH
Input-3 +5VB
+5VB +5VB
+5VB
CHB_IN[7] CHB_IN[6] CHB_IN[5] CHB_IN[4] CHB_IN[3] CHB_IN[2] CHB_IN[1] CHB_IN[0] CHB_CKR CHB_REF_CLK CHB_PRES
R65 10K
CD20 10uF
CD57
0.1uF
CD53
0.1uF
CD52
0.1uF
CHC_IN[8] CHC_IN[9]
INA-
1
INA+
2
A/!B
3
!BISTEN
4
INB+
28
INB-
27
MODE
26
REFCLK 25 RF
5
GND
6
!RDY
7
GND
8
Vccn
9
Qj (RVS)
10
Qh (Q7)
11
Qg (Q6) 12
Qf (Q5) 13
Qe (Q3) 15
Qi (Q4) 14
Qd (Q2) 16 Qc (Q1) 17 Qb (Q0) 18
Qa (SC/!D) 19
GND 20
Vccq 21
CKR 22
SO 23
Vccq 24
U7
CY7B933
Vcc
1
Vcc
2
EOM
3
Vcc
4
CD
5
AEC+
6
AEC-
7
!DO 14
DO 13
!MUTE 12
Vee 11 Vee 10
!DI 9
DI 8
U6
CLC014 R17
75R
R21 75R
D3
BAS32L
+5VB
+5VB
C11 100pF
R18 120R C13
0.1uF
C12
0.1uF R19
100R
R15 75R
L3
0.022uH
Input-4 +5VB
+5VB +5VB
+5VB+5VB
CHC_IN[7] CHC_IN[6] CHC_IN[5] CHC_IN[4] CHC_IN[3] CHC_IN[2] CHC_IN[1] CHC_IN[0] CHC_CKR CHC_REF_CLK CHC_PRES
R68 10K
CD21 10uF
CD27
0.1uF
CD22
0.1uF
CD23
0.1uF
+
C7 1uF
+
C14 1uF
+
C2 1uF
C5
0.1uF
C6
0.1uF
C15 0.1uF
CD3 0.1uF CD50 0.1uF
CD25 0.1uF
R7 10K R13 10K R16 10K
+5VB +5VB
+5VB
804900S2 804900S2.SCH 804900S3 804900S3.SCH
PC 804998
47 R33
47 R69 47 R67
CHD_IN[8] CHD_IN[9]
INA-
1
INA+
2
A/!B
3
!BISTEN
4
INB+
28
INB-
27
MODE
26
REFCLK 25 RF
5
GND
6
!RDY
7
GND
8
Vccn
9
Qj (RVS)
10
Qh (Q7)
11
Qg (Q6) 12
Qf (Q5) 13
Qe (Q3) 15
Qi (Q4) 14
Qd (Q2) 16 Qc (Q1) 17 Qb (Q0) 18
Qa (SC/!D) 19
GND 20
Vccq 21
CKR 22
SO 23
Vccq 24
U9
CY7B933
Vcc
1
Vcc
2
EOM
3
Vcc
4
CD
5
AEC+
6
AEC-
7
!DO 14
DO 13
!MUTE 12
Vee 11 Vee 10
!DI 9
DI 8
U8
CLC014 R20
75R
R22 75R
D4
BAS32L
+5VB
+5VB
C18 100pF
R28 120R C20
0.1uF
C19
0.1uF R42
100R
R64 75R
L4
0.022uH
Input-2 +5VB
+5VB +5VB
+5VB+5VB
CHD_IN[7] CHD_IN[6] CHD_IN[5] CHD_IN[4] CHD_IN[3] CHD_IN[2] CHD_IN[1] CHD_IN[0] CHD_CKR CHD_REF_CLK CHD_PRES
R23 10K
CD1 10uF
CD2
0.1uF
CD8
0.1uF
CD10
0.1uF
+
C21 1uF
CD31 0.1uF
CD46 0.1uF
R9 10K
47 R66

SCALE Sheet
DO NOT COPY NOR
DISCLOSE TO ANY
THIRD PARTY
WITHOUT WRITTEN
CONSENT
of
IRT Electronics Pty. Ltd.
Drawing No.
COPYRIGHT
ARTARMON NSW AUSTRALIA 2064
N.T.S. 804900
Revision: Date: 1
1-Feb-2005
Title MMM-4230SIZE
A2
CHECKED ENG.APR. DRAWN
23
TCLK
1
config_done
2
nCeo
3
TDO
4
VCCIO
5
GNDINT
6
7 8 9
clkusr
10
11 12 13 14 15
RdynBsy
16
17 18
initdone
19
GNDINT
20
VCCINT
21
VCCIO
22
GNDINT
23
24 25 26 27 28 29 30 31
GNDINT
32
VCCINT
33
VCCIO
34
GNDINT
35
36 37 38 39 40 41
VCCIO
42
GNDINT
43
44 45 46 47
VCCINT
48
GNDINT
49
TMS
50
nTRST
51
nSTATUS
52
53
54
55
56
57
58
GNDINT
59
60
61
lock
62
63
64
65
VCCIO
66
67
68
69
70
71
VCCINT
72
73
74
75
GNDINT
76
VCCCLK
77
input
78
clock
79
input
80
GNDCLK
81
GNDINT
82
83
VCCIO
84
85
86
87
88
89
90
VCCINT
91
92
93
94
95
96
97
VCCIO
98
99
100
101
102
103
104 157
158
159
160
161
162
163
164
VCCIO 165
166
167
168
169
170
GNDINT 171
172
173
174
175
176
177
VCCIO 178
179
dev_clrn 180
GNDINT 181
input 182
clock 183
input 184
VCCINT 185
dev_oe 186
187
GNDINT 188
189
190
191
192
193
VCCIO 194
195
196
197
198
199
200
VCCINT 201
202
203
nRS 204
205
nWS 206
CS 207
nCS 208
nConfig 105
VCCINT 106
MSEL1 107 MSEL0 108
GNDINT 109
VCCIO 110
111 112 113 114 115 116
GNDINT 117
VCCIO 118
119 120 121 122
GNDINT 123
VCCINT 124
125 126 127 128
GNDINT 129
VCCINT 130
131 132 133 134 135 136
GNDINT 137
VCCIO 138
139 140 141 142 143 144
GNDINT 145
VCCIO 146
147 148 149 150
GNDINT 151
VCCINT 152
TDI 153
nCE 154
DCLK 155
DATA0 156
U1
EPF1K50QC208-3
+VccINT +VccIO
R44
1K
R30 1K
VccIO
CHA_PRES CHC_PRES CHA_IN[9] CHA_IN[8] CHA_IN[7] CHA_IN[6] CHA_IN[5] CHA_IN[4] CHA_IN[3] CHA_IN[2] CHA_IN[1] CHA_IN[0] CHA_CKR CHC_IN[8] CHC_IN[7] CHC_IN[6] CHC_IN[5] CHC_IN[4] CHC_IN[3] CHC_IN[2] CHC_IN[1] CHC_IN[0] CHC_CHR CHA_REFCLK CHC_REFCLK CHC_IN[9]
CHD_IN[8] CHD_IN[7] CHD_IN[6] CHD_IN[5] CHD_IN[4] CHD_IN[3] CHD_IN[2] CHD_IN[1] CHD_IN[0]
CHD_CKR
CHD_REFCLK
CHD_IN[9]
TXLEV
DS3/E3
TPDATA
CHD_PRES
TNDATA
ENCODDIS
RS-422RB RS422-RA
VCC 8
B5 A6
GND 5
DI
4
DE
3
RO
1
RE
2
U15 MAX485
+5V
R50 220R
LK7 LK
Vout
1
VCC
2
GND
3
PFI
4!PFO 5
!MR 6
!RESET 7
Vbatt 8
U12
MAX704 R40
10K
+5V
R63 22R
n/c
1
GND
7OUT 8
Vcc 14
XTAL2
XTAL_OSC
+5VB
27MHz
1 2
LK5
1 2
LK4
n/c
1
GND
7OUT 8
Vcc 14
XTAL1
XTAL_OSC
44.7MHz
+5VB
1 2
LK3
1 2
LK2
1 2
LK1
URGENT RELAY
R38 10K
R37 10K
R36 10K
R35 10K
R34 10K
R45
560R
R46
560R
R47
560R
R48
560R
R56
560R
LED1
LED2
LED3
LED4
LED7
VccIO
LD1
4.7uH
LD5 4.7uH
CD49 0.1uF
CD48 0.1uF
R29 1K R31 1K
+5V
SW1
C
8 4 2 1
R52 10K
R54 10K
R53 10K
R55 10K
+VccIO
VccIO
CD5,7,24,26,29,32,47,54,55 0.1uF
CD6,15,16,17,18,19,28,30,36 0.1uF
CD34,37 10uF CD43
470uF
CD9,33,35 10uF CD42
470uF
VccIO VccIO VccIO
+VccINT +VccINT +VccINT
TCLK
DATA
1
DCLK
2
OE
3
nCS
4GND 5
nCASC 6
VCC 7 VCC 8
U14
EPC1
1 2 3 4 5 6 7 8 910
J4 HEADER 5X2
R32 1K
+5V
R41 1K
+5V
CD39 10uF
DATA
1
DCLK
2
OE
3
nCS
4GND 5
nCASC 6
VCC 7 VCC 8
U13
EPC1
31
2LK6
R39
1K
+5V
CHB_IN9 CHB_IN8 CHB_IN7 CHB_IN6 CHB_IN5 CHB_IN4 CHB_IN3 CHB_IN2 CHB_IN1 CHB_IN0 CHB_CKR
CHB_REF_CLK
CHB_PRES
+5V
R49
560R
LED5
nReset
PTB1 PTB0 Port PTA0 PTA2 PTA5 PTA7 PTA6 PTA4 PTA3 PTA1
SW2
R24 10K
+VccIO

SCALE Sheet
DO NOT COPY NOR
DISCLOSE TO ANY
THIRD PARTY
WITHOUT WRITTEN
CONSENT
of
IRT Electronics Pty. Ltd.
Drawing No.
COPYRIGHT
ARTARMON NSW AUSTRALIA 2064
N.T.S. 804900
Revision: Date: 1
1-Feb-2005
Title MMM-4230SIZE
A2
CHECKED ENG.APR. DRAWN
33
-V 4
+V 1
V+
8
V-
5
CONV1
PBBA-D
22uH IND
LD4 22uH
CB1
330u
6
1
4
3
DB1
DB106
6
1
4
3
DB2
DB106
R62 220R
VCCIO
CB2 330u
VCCINT
VCCINT
VCCIO
CB3 330u
F1 1R F3 1R F4 1R F2 1R
EMI2 FILTER EMI4 FILTER EMI3 FILTER
EMI1 FILTER
1A 1B 2A 2B 3A 3B 4A 4B 5A 5B 6A 6B 7A 7B 8A 8B 9A 9B 10A 10B 11A 11B 12A 12B 13A 13B 14A 14B 15A 15B 16A 16B 17A 17B 18A 18B 19A 19B 20A 20B 21A 21B 22A 22B 23A 23B 24A 24B 25A 25B 26A 26B 27A 27B 28A 28B 29A 29B 30A 30B 31A 31B 32A 32B M1 M2
P1 DIN64M
1A 1B 2A 2B 3A 3B 4A 4B 5A 5B 6A 6B 7A 7B 8A 8B 9A 9B
10A
10B
11A
11B
12A
12B
13A
13B
14A
14B
15A
15B
16A
16B
17A
17B
18A
18B
19A
19B
20A
20B
21A
21B
22A
22B
23A
23B
24A
24B
25A
25B
26A
26B
27A
27B
28A
28B
29A
29B
30A
30B
31A
31B
32A
32B
M2 M1
J1 DIN64F
1 2 3
J3 AC
TP7 3.3V TP5 2.5V
INPUT
1
COMMON
2
OUTPUT
3
U17 REG_LM3940
ADJUST
1
OUTPUT
2
INPUT
3
U16 LM317S
1 2
J5
RS422-RB RS422-RA
SK1
Input-1 ASI
INPUT 1
SK2
ASI
INPUT 2
SK4
ASI INPUT 3
L9
0.022uH
SK5 BNC
G703
OUTPUT
Input-2 Input-4
G703OUT
URGENT ALARM
R61 220R
+5VB
URGENT RELAY
RL1 COIL
+5VB
RL1 CONTACT
R43 4K7
32
1Q1
BSS123
1
5
1A
4B
RS-422
R51 820R
LED6
POWER
+5V
3 8
LD2
CB4 470u CB5
470u
SK3
ASI
INPUT 3
Input 3
+5V
R70
0R
R71 0R
R72
0R
R73 0R
RCLK
1
RLOOP
2
LLOOP
3
DS3/E3
4
TAOS
5
VDD 6
TPDATA
7
TNDATA
8
TCLK
9
GND 10
ENCODIS
11
DECODIS
12
BPV 13
RNRZ 14 RNEG 15
RPOS 16
RCLKO 17
DMO 18
MRING
19
MTIP
20
GNDA 21
TRING 22
TTIP 23
VDDA 24
TXLEV
25
ICT
26
RPDATA
27
RNDATA
28
U10
XR-T7296
+5B
R57 33R R58 33R
+5B
GND
TPDATA TNDATA TCLK
ENCODIS DS3/E3 TXLEV
CD44 100n
CD45 100n
6
1
34
2
5
T1 113B7
D6 BAV99 D5 BAV99 GND
+5B
GND
+5B
TPDATA TNDATA
TCLK
ENCODIS DS3/E3 TXLEV
12 3
G703OUT
RX S1
TX S2
nRESET S3
S4
GND S5
+5V S6
PTB1 B1 PTB0 B2 PTB3 B3 PTB2 B4 PTB5 B5 PTB4 B6 PTB7 B7 PTB6 B8
GND B9 GND B10
GND
A10 GND
A9 PTA1 A8 PTA0 A7 PTA3 A6 PTA2 A5 PTA4 A4 PTA5 A3 PTA6 A2 PTA7 A1 M1
SNMP
+5V
nReset
1 2 3 4
5 6
P1 MTMM-103
1 2 3 4 5
P3 MTMM-PWR
PTA6 PTA7 PTA5 PTA4 PTA2 PTA3 PTA0 PTA1
PTB1 PTB0
P2
CB6
330u
CB7 330u