DekTec DTM-3200 Manuale utente

DTM-3200

OEM TS-over-IP Converter

USER MANUAL

October 2014

Dystrybucja: elmier.pl elmier@elmier.pl +48 500 16 343

DTM-3200 – OEM Ethernet TSoIP Converter

User Manual

Table of Contents

Firmware Revision History ........................................................................................................ 4

1. Introduction ........................................................................................................................ 6

1.1 General description ....................................................................................................... 6

1.2 TSoIP-to-ASI mode ......................................................................................................... 6

1.3 ASI-to-TSoIP mode .........................................................................................................

1.4 Control .........................................................................................................................

1.5 DTM-3200 protocol handler ...........................................................................................

1.6 Theory of operation ....................................................................................................... 8

1.6.1 IP-to-ASI converter - Functional block diagram .......................................................... 8

1.6.2 ASI-to-IP converter mode - Functional block diagram ................................................ 9

1. List of abbreviations ....................................................................................................... 9

1.8 References .................................................................................................................. 10

2. Getting Started ................................................................................................................. 11

2.1 Introduction ................................................................................................................. 11

2.2 Configuration #1: Converting TSoIP to ASI ..................................................................... 11

2.2.1 Test set-up .......................................................................................................... 11

2.2.2 Configuring the TSoIP to ASI conversion ................................................................. 11

2.3 Configuration #2: Converting ASI to TSoIP ..................................................................... 12

2.3.1 Test set-up .......................................................................................................... 12

2.3.2 Configuring the ASI to TSoIP conversion ................................................................. 12

3. Layout and Installation....................................................................................................... 13

3.1 Physical layout ............................................................................................................. 13

3.2 Mechanical dimensions ................................................................................................ 13

3.3 Order codes ................................................................................................................ 14

3.4 Hardware installation ................................................................................................... 14

3.4.1 Mechanical installation ......................................................................................... 14

3.4.2 ASI connector ...................................................................................................... 14

3.4.3 Parallel-TS connector ........................................................................................... 14

3.4.4 DIP switches ........................................................................................................ 15

3.4.5 Control connector ................................................................................................ 16

3.4.6 Ethernet connector ............................................................................................... 1

3.4. Power connector .................................................................................................. 1

3.4.8 Stream status LED ................................................................................................ 18

3.4.9 DTM-3200 status LED .......................................................................................... 18

4. Device Configuration and Monitoring.................................................................................. 19

4.1 Control interfaces ........................................................................................................ 19

4.2 Command protocol ...................................................................................................... 19

4.2.1 Command protocol on RS-232 / RS-422 / RS-485 .................................................. 19

4.2.2 Command protocol on I

2C.................................................................................... 20

4.3 Manageable items ....................................................................................................... 21

4.4 Categories .................................................................................................................. 22

4.4.1 Data types .......................................................................................................... 22

DTM-3200 – OEM Ethernet TSoIP Converter

User Manual

4.4.2 Device properties ................................................................................................. 22

4.4.3 Overall configuration ........................................................................................... 23

4.4.4 Network settings .................................................................................................. 23

4.4.5 Firmware update ................................................................................................. 24

4.4.6 IP receive settings ................................................................................................. 25

4.4. IP transmit settings ............................................................................................... 2

4.4.8 ASI input settings ................................................................................................. 29

4.4.9 ASI output settings................................................................................................ 29

4.5 Firmware upgrade ....................................................................................................... 30

4.5.1 Firmware upgrade - Phases .................................................................................. 30

4.5.2 Firmware upload – Example.................................................................................. 31

4.5.3 Binary data to Ascii data function .......................................................................... 31

4.6 Failsafe mode.............................................................................................................. 32

5. Specifications .................................................................................................................... 33

5.1 Network connection ..................................................................................................... 33

5.2 DVB-ASI input/output ................................................................................................... 33

5.3 Parallel port input/output .............................................................................................. 33

5.4 Transport-Stream input/output over IP ............................................................................ 34

5.5 Serial control port ........................................................................................................ 35

5.6 I

2C control port ............................................................................................................ 35

5. Other specifications ..................................................................................................... 35

Appendix A. Mechanical Dimensions...................................................................................... 36

Appendix B. DTM-3200 Development Kit................................................................................ 3

Appendix C. Command-Line Tool - DtmCmd .......................................................................... 39

Appendix D. Communication Example .................................................................................... 41

DekTec Digital Video B.V. reserves the right to change products or specifications without notice.

Information furnished in this document is believed to be accurate and reliable, but DekTec assumes

no responsibility for any errors that may appear in this material.

DTM-3200 – OEM Ethernet TSoIP Converter

User Manual

Firmware Revision Histor

Version Date Changes

2.3 2014.10.0 Important notice for upgrading to firmware version v2.3:

 An upgrade to firmware version 2.3 is only possible if the firmware version of

your DTM-3200 is v2.0 or higher. If the current firmware version is older than

v2.0, please first upgrade the unit to v2.0.

Changes:

 Firmware update v2.3 adds an item to the ASI input settings category: this allows

one to force the module to use a specific input port. The default (which can be

chosen as well) is to auto-detect which input has a signal.

Bug fixes:

 IGMP/multicast issue seen after 49 days

 Possible failure to sync to ASI input stream

 Several other small improvements and bug-fixes

2.2 2013.0 .11 Important notice for upgrading to firmware version v2.2:

 Firmware update v2.2 contains both application and failsafe firmware. Any

interruption of the upgrade process may result in an unusable DTM-3200

module.

 An upgrade to firmware version 2.2 is only possible if the firmware version of

your DTM-3200 is v2.0 or v2.1. If the current firmware version is older than

v2.0, please first upgrade the unit to v2.0.

Bug fixes:

 Fix for failsafe firmware not starting correctly in specific cases

2.1 2012.10.12 Important notice for upgrading to firmware version v2.1:

An upgrade to firmware version 2.1 is only possible if the firmware version of your

DTM-3200 is v2.0. If the current firmware version is older than v2.0, please first

upgrade the unit to v2.0.

Bug fixes:

 Ignore a reboot command while the device is rebooting

 Stability fixes in the rate estimation algorithm

2.0 2012.03.28 Important notice for upgrading to firmware version v2.0:

Firmware update v2.0 contains both application and failsafe firmware. Any

interruption of the upgrade process may result in an unusable DTM-3200 module.

The first boot after this update will take longer than usual, this is normal behavior.

Fixed issues:

 DTM-3200 unicasts to all ports of a switching hub

 Category 0x81, setting 0x14 'PCR present' does not work

 Category 0x81, setting 0x15 'Rate change counter': value is incorrect

 Category 0x81, setting 0x19 ‘Delay factor’: value is incorrect

 Corruption of IP packet headers leading to occasional packet loss

 DHCP client is started twice

 The serial command protocol is case-sensitive, should be case insensitive

 After extensive communication and reboot the application firmware may get

corrupted

 Dtm3200Util user interface locks up when repeatedly sending a setting to

category 0x82, while no Ethernet cable has been attached

Fixed issues related to I2C control:

 Accessing other I2C devices while DTM-3200 is processing a command causes

DTM-3200 – OEM Ethernet TSoIP Converter

User Manual

the DTM-3200 to become unresponsive

 DTM-3200 does not generate an I2C error response when an incorrect

command has been issued

 DIP switches #3 and #4 have no effect when used to set I2C slave address

 An I2C master has to wait at least 10ms between issuing a command and trying

to read the response

Changes affecting customer design:

 The I2C read behavior has changed: The DTM-3200 will always acknowledge

its address when a read-cycle is initiated. When there is no data available to

return to the master, zeroes will be returned. This also means that zeroes are

appended to a message when the master reads more bytes than available

 The firmware update ASCII encoding (does not apply to I2C) has been altered

and is incompatible with previous versions, including older failsafe firmware

 Enabling the DHCP client by writing an IP address with value 0.0.0.0 is no

longer supported. Writing 0.0.0.0 will result in an error-response, since it is an

incorrect fixed IP address. The user should use the DHCP-enable setting instead

 Every message sent by the DTM-3200 on the RS-XXX port now uses uppercase

ASCII characters. Users checking for lowercase characters should change this to

uppercase. e.g. "3A" instead of "3a", "R" instead of "r"

Other changes:

 Added 'VBR' mode, category 0x81, setting 0x16, data 0x03

 Changed behavior of the DHCP enable setting (category 0x03, setting 0x04)

 Added 'Volatile Storage' setting (category 0x02, setting 0x03), giving the user the

option to choose between RAM or FLASH storage of settings

 Added checking for 'r' and 'R' in the read/write-field of a command message.

Previously any character other than 'w' or 'W' would result in a read reply

 Added protocol checks for incorrect settings; these will result in an 'E' reply

 Removed automatic reboot at the end of the firmware update process

 Firmware update speed has been improved, compressed programming files are

now supported and ASCII encoding has been altered

 MPEG null packets (PID 8191) are now ignored when scanning for PCRs, to

prevent incorrect detection of PCRs resulting in lock errors

1.0 2010.03.31 Initial release to the field

DTM-3200 – OEM Ethernet TSoIP Converter

User Manual

1. Introduction

1.1 General description

The DTM-3200 is a compact OEM module to convert ASI to or from a Transport Stream over IP

(TS-over-IP or TSoIP). Next to the serial ASI interface, the unit supports a parallel interface. The

direction of the conversion (TSoIP to ASI or ASI to TSoIP) can be configured programmatically

through the control interface.

Figure 1. The PCB of the DTM-3200

The DTM-3200 is available in two models and a development kit (see also §3.3):

 DTM-3200 with standard pin headers (power connector is right-angle type);

 DTM-3200-RA with right-angle pin headers;

 DTM-3200-DEVKIT: DTM-3200 with power supply and cables.

1.2 TSoIP-to-ASI mode

When configured as TSoIP-to-ASI converter, the unit accepts unicast and multicast streams over its

Gigabit-Ethernet port. Key features include de-encapsulation of UDP or RTP, IP jitter removal and

error correction according to SMPTE 2022-1. The resulting stream is transmitted simultaneously on

the ASI output connector and the parallel pin header.

Control

TSoIP

DVB-ASI

DVB-SPI

DTM-3200

Figure 2. The DTM-3200 configured as IP-to-ASI converter

DTM-3200 – OEM Ethernet TSoIP Converter

User Manual

1.3 ASI-to-TSoIP mode

When configured as ASI-to-TSoIP converter, the DTM-3200 accepts ASI or parallel input. The ASI

input is selected automatically when a signal is available; otherwise the parallel input is used. Key

features include encapsulation of UDP or RTP, controlled scheduling of IP packets to prevent IP jitter

(zero jitter playout), and adding forward error correction (FEC) according to SMPTE 2022-1.

Control

TSoIP

DVB-ASI

DTM-3200

DVB-SPI

Figure 3. The DTM-3200 configured as ASI-to-IP converter

1.4 Control

The unit can be managed and controlled through one of the available control interfaces: I

2C or

RS-232/485/422. Settings applied through one of the control interfaces can be stored in non-

volatile memory (if setting Volatile storage is ‘1’) or in volatile memory (if setting Volatile storage is

‘0’) on the unit. Settings stored in non-volatile memory are automatically reloaded after a power

cycle. It is not possible to configure the device via the Ethernet interface.

There are three ways to control the DTM-3200:

1. From a development PC using the serial RS-232 control interface. This way of controlling can

be used for pre-configuring the DTM-3200, or for experimenting with the DTM-3200.

2. Using a controller on-board of the equipment that uses the DTM-3200 for I/O conversion. In

this case I

2C is a plausible choice, but the other serial interfaces may also be used.

3. Stand-alone mode. The DTM-3200 is pre-configured and no dynamic control is applied.

Two test tools are available:

1. Dtm3200Util – Windows GUI tool to view status and control settings of the DTM-3200. The

tool can also be used to upload firmware. Dtm3200Util is convenient for initial configuration

of the DTM-323 and for experimentation with the DTM-3200.

2. DtmCmd – Command-line tool to send commands to the DTM-3200. Multiple commands can

be combined in a script to apply a group of settings in one go. DtmCmd is useful for studying

the low-level commands available for the DTM-3200. It is also useful to apply a pre-defined

group of setting values from a script.

1.5 DTM-3200 protocol handler

An open source implementation of a protocol handler for DTM-32xx devices is available from

www.dektec.com free of charge. It consists of two source files, DtmHandler.c and

DtmHandler.h, which can be compiled and linked into your C or C++ application. Please refer to

DtmHandler.h for information about how to use the protocol handler in your application.

DTM-3200 – OEM Ethernet TSoIP Converter

User Manual

Note:

 Command-line tool DtmCmd is an example of an application that uses the DTM handler. The

source of DtmCmd is also available on the DekTec website.

1.6 Theor of operation

Essentially, the DTM-3200 consists of two subsystems:

 A Stream Processor, which converts the IP packets to a base-band Transport Stream and

outputs it as ASI and parallel, or vice versa;

 A processor subsystem that handles all internal and external control (I

2C, RS232/485/422).

The DTM-3200 is operating either as IP-to-ASI converter, or as ASI-to-IP converter.

1.6.1 IP-to-ASI converter - Functional block diagram

Figure 4 shows the functional block diagram of the DTM-3200 when it is configured as IP-to-ASI

converter.

Transmit

Channel

Processor Subsystem

IP DATA

Filter

FEC

reconstructor

Bitrate control

LVDS buffer

ETHERNET

INTERFACE

MAC

Transmit-

ter

eceiver

IP DATA

DDR

SDRAM

Controller

DDR

SDRAM

Phy

Stream

characte-

ristics

extractor

Cable driver

Serializer

S232 or

S485 or

S422

I2C

DVB-SPI

DVB-ASI

CONT OL

Ethernet

CONT OL

Figure 4: Functional block diagram of the DTM-3200 when configured as IP-to-ASI converter

The incoming Ethernet packets are received by the physical layer interface (PHY). The Ethernet

interface checks the packets for corruption and correctness, and sends them to the IP filter that

selects the desired stream. Other IP packets are sent to the processor subsystem in order to support

low-level IP protocols like ARP and DHCP. From the IP Filter the transport stream data enters the

stream characteristics extractor. This block will analyze the stream for specific characteristics like PCR

information. With these characteristics, the DTM-3200 determines the bitrate for transmitting the

stream at the output. The FEC Reconstructor uses the FEC streams (if available) to reconstruct

missing packets (if any).

In the next step, the data is stored in SDRAM. Jitter on the IP input stream may cause late arrival of

some IP packets. The memory is used as a buffer to ‘de-jitter’ the stream. The size of the de-jitter

buffer can be set via the control interface. The IP stream is then converted to a Transport Stream (TS)

with the correct bitrate. The resulting stream is transmitted as an ASI and as a parallel stream at the

same time. The TS contents are not affected by the DTM-3200.

DTM-3200 – OEM Ethernet TSoIP Converter

User Manual

1.6.2 ASI-to-IP converter mode - Functional block diagram

Figure 5 shows the functional block diagram of the DTM-3200 when it is configured as ASI-to-IP

converter.

Receive

Channel

Processor Subsystem

IP DATA

Filter

FEC

generator

LVDS

receiver

ETHERNET

INTERFACE

MAC

Transmit-

ter

eceiver

IP DATA

DDR

SDRAM

Controller

DDR

SDRAM

Phy

Embed-

der

Cable

equaliser

De-

serializer

S232 or

S485 or

S422

I2C

DVB-SPI

DVB-ASI

CONT OL

Ethernet

CONT OL

Transmit-

ter

Intput

select

Valid

Figure 5: Functional block diagram of the DTM-3200 when configured as ASI-to-IP converter

The incoming stream is received either through the serial or the parallel input. Only one stream can

be received at a time. If the Deserializer detects a valid input stream, the Input Selector selects the

DVB-ASI input, otherwise the Input Selector selects the parallel input. The TS Receive Channel

synchronizes to the stream and determines the packet size (188 or 204 bytes). If the DTM-3200 is

configured to generate FEC packets, the FEC Generator will create row and column FEC data. The

IP Embedder embeds the TS packets in IP packets. Finally, the PHY transmits the IP packets through

the Ethernet interface.

1.7 List of abbreviations

ASI Asynchronous Serial Interface. Shorthand for DVB-ASI.

auto-MDIX Automatic medium-dependent interface crossover. Technique to

automatically detect the type of network cable: straight-through or

crossover.

DHCP Dynamic Host Configuration Protocol. Network protocol to automatically

assign an IP address to a network port from a server.

DVB Digital Video Broadcasting

FEC Forward Error Correction

IP Internet Protocol

MAC Media Access Controller

Mbps Megabit per second

NA Not Applicable

NC Not Connected

PCR Program Clock Reference

R/W Read / Write

RO Read Only

DTM-3200 – OEM Ethernet TSoIP Converter

User Manual

RTP Real-time Transport Protocol

SPI Synchronous Parallel Interface. Shorthand for DVB-SPI.

TSoIP Transport Stream over IP

UDP User Datagram Protocol

WO Write Only

1.8 References

[1] SMPTE-2022-1, Forward Error Correction for Real-Time Video/Audio Transport Over IP

Networks

[2] SMPTE-2022-2, Unidirectional Transport of Constant Bit Rate MPEG-2 Transport Streams

on IP Networks

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