DekTec DTM-3237 User Manual

DTM-3237

OEM DVB-S2 Receiver with DVB-ASI Output

USER MANUAL

November 2013

DTM-3237 – OEM DVB-S2 Receiver with DVB-ASI Output User Manual

Table of Contents

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

1. Introduction ........................................................................................................................ 5

1.1 General description ....................................................................................................... 5

1.2 DVB-S(2) input modes .................................................................................................... 5

1.3 Output modes ............................................................................................................... 5

1.4 Control ......................................................................................................................... 5

1.5 DTM-3237 Protocol Handler ........................................................................................... 6

1.6 Theory of operation ....................................................................................................... 6

1.7 List of abbreviations ....................................................................................................... 6

1.8 References .................................................................................................................... 7

2. Getting Started ................................................................................................................... 8

2.1 Introduction ................................................................................................................... 8

2.2 Configuration: Receiving a DVB-S(2) stream ..................................................................... 8

2.2.1 Test set-up ............................................................................................................ 8

2.2.2 Configuring the DVB-S(2) to ASI conversion .............................................................. 8

3. Layout and Installation....................................................................................................... 10

3.1 Physical layout ............................................................................................................. 10

3.2 Mechanical dimensions ................................................................................................ 10

3.3 Order codes ................................................................................................................ 11

3.4 Hardware installation ................................................................................................... 11

3.4.1 Mechanical installation ......................................................................................... 11

3.4.2 RF connector ....................................................................................................... 11

3.4.3 ASI connector ...................................................................................................... 11

3.4.4 Control connector ................................................................................................ 12

3.4.5 Power connector .................................................................................................. 12

3.4.6 Stream status LED ................................................................................................ 13

4. Device Configuration and Monitoring.................................................................................. 14

4.1 Control interfaces ........................................................................................................ 14

4.2 Command protocol ...................................................................................................... 14

4.2.1 Command protocol on USB and LVTTL serial control port ........................................ 14

4.2.2 Command protocol on I2C.................................................................................... 16

4.3 Manageable items ....................................................................................................... 17

4.4 Delayed execution........................................................................................................ 17

4.5 Categories .................................................................................................................. 18

4.5.1 Data types .......................................................................................................... 18

4.5.2 Device properties ................................................................................................. 19

4.5.3 Overall configuration ........................................................................................... 20

4.5.4 Firmware upgrade ............................................................................................... 20

4.5.5 Receiver settings .................................................................................................. 21

4.5.6 Receiver status ..................................................................................................... 21

4.5.7 Receiver statistics ................................................................................................. 23

4.5.8 DiSEqC send and receive options .......................................................................... 24

DTM-3237 – OEM DVB-S2 Receiver with DVB-ASI Output

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.

User Manual

4.6 Firmware upgrade ....................................................................................................... 25

4.6.1 Firmware upgrade - Phases .................................................................................. 25

4.6.2 Firmware upgrade - Data encoding ....................................................................... 25

4.6.3 Firmware upload - Example .................................................................................. 26

5. Specifications .................................................................................................................... 27

5.1 RF input ...................................................................................................................... 27

5.2 DVB-ASI input .............................................................................................................. 28

5.3 Serial control port ........................................................................................................ 28

5.4 I2C control port ............................................................................................................ 28

5.5 USB control port .......................................................................................................... 29

5.6 Other specifications ..................................................................................................... 29

Appendix A. Mechanical Dimensions...................................................................................... 30

Appendix B. DTM-3237 Development Kit................................................................................ 31

Appendix C. Command-Line Tool - DtmCmd .......................................................................... 33

Appendix D. Communication Example .................................................................................... 35

DTM-3237 – OEM DVB-S2 Receiver with DVB-ASI Output

Version

Date

Changes

0.1

2013.11.11

Added setting 0 to certain category’s, which contains all settings in that category.

Using this setting reduces the amount of transfers from/to the device up to 80% when reading all settings. Please refer to the section §4.5 “Device Configuration and Monitoring – Categories” for more information.

Added setting option “DVB-S2 Multiple Input Stream” (6) to the Modulation Type setting (0x04) in category Receiver Status (0x91).

Limited setting Link Margin (0x06) in category Receiver statistics (0x92) to DVB-S2 Single Input Streams.

Changed interface name to “LVTTL serial control port” in order to avoid confusion. Please refer to chapter §4.2.1 “Command protocol on USB and LVTTL serial control port” for more information.

0.0

2013.06.03

Initial release to the field

User Manual

Revision History

DTM-3237 – OEM DVB-S2 Receiver with DVB-ASI Output User Manual

1. Introduction

1.1 General description

The DTM-3237 is a compact OEM module for receiving DVB-S2 or DVB-S and outputting it as DVB-ASI. The DTM-3237 can supply LNB power and has support for sending and receiving DiSEqC messages. The transponder details and the output format can be configured programmatically through several control interfaces.

Figure 1. The PCB of the DTM-3237

A development kit (DTM-3237-DEVKIT; refer to Appendix B) is available for easy setup and experimentation with the DTM-3237.

1.2 DVB-S(2) input modes

The DTM-3237 supports all functionality described in EN 300 421 (DVB-S) and EN 302 307 (DVB-S2). All DVB-S2 modulation types can be demodulated: QPSK, 8PSK, 16/32APSK. The DTM-3237 supports advanced DVB-S2 features including VCM, ACM, Multiple Input Streams (MIS) and Generic Stream (GS).

1.3 Output modes

The DTM-3237 can output the DVB-S(2) stream in 2 modes: Transport Stream and L.3 Baseband frames. Please refer to DTAPI Manual - Overview and Data Formats.pdf for more detailed

information about the L.3 Baseband frame data format. This document is part of DekTec’s Windows SDK and can be downloaded from www.dektec.com.

1.4 Control

The unit can be managed and controlled through one of the available control interfaces: USB, I2C or LVTTL serial control port. Settings applied through a control interfaces are persisted in non-volatile memory if setting Volatile storage is ‘1’. Persisted settings are automatically reloaded after a power cycle. The penalty for persisting settings is that it takes some time to store the setting value in nonvolatile memory, and a limit to the number of write cycles to non-volatile memory exist.

If setting Volatile storage is ‘0’, applying settings is immediate, but new setting values will disappear when power is removed.

There are three ways to control the DTM-3237:

1. From a development PC using the USB control interface. The development PC runs a control tool: Dtm3237Util or DtmCmd. This way of controlling can be used for pre-configuring the DTM-3237, or for experimenting with the DTM-3237.

DTM-3237 – OEM DVB-S2 Receiver with DVB-ASI Output

ACM

Adaptive coding and modulation

APSK

Amplitude and phase-shift keying

ASI

Asynchronous serial interface. Shorthand for DVB-ASI.

BCH

Cyclic error-correcting codes, abbreviation comprises the initials of its inventors names (inner FEC coding used for DVB-S2)

BER

Bit error rate

CCM

Constant coding and modulation

CNR

Carrier to noise ratio

User Manual

2. Using a controller on-board of the equipment that uses the DTM-3237 as co-processor board for satellite reception. In this case I2C or LVTTL serial control port is a plausible choice for the control interface, but USB interface can also be used. The I2C address and LVTTL serial control port baud rate can be pre-configured through USB with Dtm3237Util. The factory-default I2C address is 0x60 and the default LVTTL serial control port baud rate is 9600.

3. Stand-alone mode. The DTM-3237 is pre-configured and no dynamic control is applied.

Two control tools are available:

1. Dtm3237Util – Windows GUI tool to view status and control settings of the DTM-3237. The tool can also be used to upload new firmware versions. Dtm3237Util is convenient for initial configuration of the DTM-3237 and for experimentation with the DTM-3237.

2. DtmCmd – Command-line tool to send commands to the DTM-3237. 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-3237. It is also useful to apply a pre-defined group of setting values from a script.

1.5 DTM-3237 Protocol Handler

For developers that implement their own application controlling the DTM-3237, an open source implementation of a protocol handler for DTM-32XX devices is available. It can be downloaded from

www.dektec.com free of charge, and can be used royalty-free. 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 integrate the protocol handler in your application.

Note:

 The command-line control tool DtmCmd is an example of an application that uses the DTM

handler. The source of DtmCmd is also available on the DekTec website. Please refer to Appendix C for more information about DtmCmd.

1.6 Theory of operation

Essentially, the DTM-3237 consists of two subsystems:

 A tuner, demodulator and stream processor, converting the modulated DVB-S(2) input signal to

a Transport Stream or L.3 Baseband frames on DVB-ASI;

 A processor subsystem that handles all internal/external control (USB, I

C, LVTTL serial control).

1.7 List of abbreviations

DTM-3237 – OEM DVB-S2 Receiver with DVB-ASI Output

CRC

Cyclic redundancy check

DiSEqC

Digital Satellite Equipment Control

Eb/N0

Energy per bit to noise power spectral density ratio

Es/N0

Energy per symbol per noise power spectral density

FEC

Forward error correction

FLASH

Non-volatile storage chip

ISI

Input stream identifier

L.3

Receiver adaptation serial output interface with in-band signaling

LDPC

Low-density parity-check code (outer FEC coding used for DVB-S2)

LNB

Low noise block

LVTTL

Low voltage transistor-transistor logic (3.3V)

Mbps

Megabit per second

MER

Modulation error rate

MIS

Multiple Input Stream

ModCod

Modulation and coding (combination of constellation and code rate)

Not applicable

Not connected

PSK

Phase-shift keying

QPSK

Quadrature phase-shift keying

R/W

Read / Write

Read only

Reed-Solomon (inner FEC coding used for DVB-S)

SIS

Single Input Stream

SNR

Signal to noise ratio

ST188

188-byte Transport Stream mode

VCM

Variable coding and modulation

Write only

User Manual

1.8 References

[1] DTAPI Manual - Overview and Data Formats, L.3 Baseband frame implementation. Part of

DekTec’s Windows SDK

[2] DVB-S, ETSI EN 300 421, Digital Video Broadcasting (DVB); Framing structure, channel

coding and modulation for 11/12 GHz satellite services

[3] DVB-S2, ETSI EN 302 307, Digital Video Broadcasting (DVB); Second generation framing

structure, channel coding and modulation systems for Broadcasting, Interactive Services, News Gathering and other broadband satellite applications.

DTM-3237 – OEM DVB-S2 Receiver with DVB-ASI Output

Modulation standard

DVB-S or DVB-S2

Constellation

QPSK, 8PSK, 16-APSK or 32-APSK

Frequency

1150 MHz

Code rate

Symbol rate

27.5 MSymbol/s

RF power level

-30dBm

2. Getting Started

2.1 Introduction

This section provides a walkthrough for getting started with the DTM-3237. The description below assumes that you have a DTM-3237 development kit available (see Appendix B). The DTM-3237 is connected to a development PC with USB. The GUI control tool Dtm3237Util is used to apply settings and observe status.

2.2 Configuration: Receiving a DVB-S(2) stream

This setup will receive a DVB-S(2) stream and transmit the stream on the ASI interface.

2.2.1 Test set-up

For testing this configuration, a DVB-S(2) signal should be connected to the DTM-3237’s RF input. To observe the output of the DTM-3237, an ASI receiver is helpful1.

This tutorial assumes that a DVB-S(2) stream with the following or equivalent parameters is applied to the DTM-3237.

2.2.2 Configuring the DVB-S(2) to ASI conversion

Use Dtm3237Util to configure the DTM-3237 as shown in the table below. The receiver is updated when a configuration parameter is updated using the pen icon next to each setting.

Change the following parameters:

The DTM-3237 will now receive a DVB-S(2) stream and transmit this stream on the ASI port. The status LED will be steady green to indicate successful transmission of the transport stream on the ASI output. If no DVB-S(2) stream is received, the status LED will flash green on and off.

A screenshot of the Dtm3237Util after configuration is added on the next page.

If you do not have a suitable DVB-S(2) modulator and/or ASI receiver, this functionality can, for example, be realized with a PC and a DekTec DTA-2107 and/or DTA-2144 I/O card in it. Please consult your local DekTec representative for more information.

DTM-3237 – OEM DVB-S2 Receiver with DVB-ASI Output User Manual

Below you find a screenshot of the Dtm3237Util after all settings for the “Getting Started” configuration has been applied and the upper left refresh arrow has been pressed to refresh all the settings, receiver status and statistics.

DTM-3237 – OEM DVB-S2 Receiver with DVB-ASI Output

Field

Connector type

Description

RF input

MCX 75Ω

DVB-S(2) input

ASI output

MCX 75Ω

DVB-ASI output

Status LED

DTM-3237 Status LED

Identifier

Type and revision number

Control

10-pin header

2.54mm pitch

LVTTL serial control port and I2C interface for board control

Power

6-pin header

2.54mm pitch

Power and reset

Power

Molex KK series

2.54mm pitch

Power and reset

USB

Female mini-B

USB interface for board control

Factory

Factory connector; Not used in normal operation

User Manual

3. Layout and Installation

3.1 Physical layout

3.2 Mechanical dimensions

See Appendix A.

DTM-3237 – OEM DVB-S2 Receiver with DVB-ASI Output

Order Code

Picture

Description

DTM-3237

DTM-3237 – OEM DVB-S2 receiver with DVB-ASI output

DTM-3237-DEVKIT

The DTM-3237 development kit contains the following items:

 DTM-3237 placed on four plastic studs  12V/1.5A power supply with three-way Molex KK connector  USB cable type A to mini B  MCX to F female cable assembly with a length of 130 mm  MCX to BNC cable assembly with a length of 130 mm

User Manual

3.3 Order codes

3.4 Hardware installation

3.4.1 Mechanical installation

The unit can be mounted onto a support plate by means of four 3 mm bolts and appropriate spacers. Ensure that there is sufficient airflow to provide cooling of the board.

3.4.2 RF connector

RF connector (1) is a MCX connector with an impedance of 75 ohm.

3.4.3 ASI connector

ASI connector (2) is a MCX connector with an impedance of 75 ohm.

DTM-3237 – OEM DVB-S2 Receiver with DVB-ASI Output

Function

LVTTL serial control port TX

2 LVTTL serial control port CTS

LVTTL serial control port RX

4 LVTTL serial control port RTS

NC 6

NC 7 GND 8

I2C SCL

I2C SDA

I2C SCL

Connector 6 – Pin header 2.54 mm pitch

Function

+12V DC in

2 +12V DC in

Ground

4 Ground

Reset 6

Reset

Connector 7 - Molex KK series 2.54 mm

pitch

Function

+12V DC in

Ground

Reset

User Manual

3.4.4 Control connector

The pinning of the control connector is shown in the table below. It’s a dual row pin header for connecting the LVTTL serial control port or I2C control bus.

The pinning of this connector in the table above must be read from the DTM-3237’s point of view. For example: Pin 1 TX is the DTM-3237 transmitter pin, which should be connected to the RX pin on the equipment which uses the DTM-3237.

An I2C controller can be connected to SDA and SCL on pin 11 and 12, with signal ground on pin 9.

3.4.5 Power connector

The DTM-3237 must be powered from an external source with a voltage of 12V DC. Power consumption is max. 5W without the LNB power enabled. Two power connectors are available, connector 6 and 7. Please refer to §3.1- Physical layout for the connector layout. The pinning of these power connectors is shown below.

The board can be reset by pulling the reset pin to ground for at least 100ms. The reset pin is connected with a resistor to the 12V DC input voltage. When connecting a driver to the reset pin of the DTM3237, make sure it is 12V tolerant. To trigger a reset, the voltage on the reset pin shall be 700mV or less.

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