SVP HDT-02_H.264 User manual

SVP
Broadcast
Microwave
HDT-02_H.264
HIGH DEFINITION DIGITAL
MULTIBAND - MULTIFUNCTION
TRANSMITTER
USER MANUAL V4.11
Accessories included in this manual:
PA-5
PA-10
AV-X03F
Antenna
GPS-02
Antenna
RTC-01
Remote Control

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HDT-02_H.264 High Definition Digital Camera Transmitter
USER’S MANUAL V4.11
Contents
Chapter 1: Introduction
This first chapter provides a general description of the High Definition HDT-
02_H.264 camera transmitter.
Chapter 2: Technical features
This second part offers transmitter physical and environmental
characteristics.
Chapter 3: Transmitter operation and Menus
This third part provides the user with all necessary information to control
and operate the equipment properly. It is detailed the function of each
button on the keyboard. It is also explained how the information is shown
on the display, transmitter menus, alarms, etc.
Chapter 4: GPS Application
In this chapter, the use of the GPS incorporated system and some of its
applications are shown.
Chapter 5: Web Server and SNMP
This chapter provides a detailed description of the Web Server tool. This
feature allows the control of the HDT-02_H.264 transmitter through a web
page.
Chapter 6: Remote Control
The use of the RTC-01 device provides a remote connection to the HDT-
02_H.264 transmitter.
Chapter 7: Equipment Installation
This seventh chapter indicates the available connections of the transmitter,
their characteristics and the installation of the transmitter.
Index A: PA-5 and PA-10 Power Amplifiers User’s Guide
Index B: AVF 203 Flexible Antenna User’s Guide
Index C: GPS User’s Guide
Index D: Modulation Standards

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HDT-02_H.264 High Definition Digital Camera Transmitter
USER’S MANUAL V4.11
Dear customer,
We would like to thank you for selecting this equipment and welcome you to
the SVP’s products user’s growing family.
We are sure that the addition of this equipment to your existing installation
will cause you nothing but satisfaction.
Please read these instructions carefully, and keep them at hand in case you
have to refer to them.

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HDT-02_H.264 High Definition Digital Camera Transmitter
USER’S MANUAL V4.11
About this manual
This user’s guide provides indications and explanations about how to easily
set up the HDT-02 transmitter for the most common use cases.
This document is intended to help first time users:
-Find their way around the GUI.
-To understand the different possibilities of the HDT-02 transmitter.
-To configure the HDT-02 for their specific configurations.
Symbols
The symbols that appear in this manual are:
An information message which indicates explanations for the
proper operation of the equipment.
Advises users that failure to take, avoid or make a specific
action could result in damages of the device.
In the places where this symbol appears it means that by
pressing the Down button of the equipment the user can
access to the next screen.
This symbol means that pressing the OK button in the options
where this symbol appear, the user can access to the submenu
related to that option or can change the value of the
parameter.
<> These symbols mean that the parameter can be modified in the
same screen with the right and left keys.

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HDT-02_H.264 High Definition Digital Camera Transmitter
USER’S MANUAL V4.11
Important Notes
1. The HDT-02_H.264 High Definition camera transmitter is completely
compatible with the DVB-T/T2/S2 Standards, included in the European
Standard ETSI EN300744 (DVB-T), ETSI EN300755 (DVB-T2), ETSI
EN302307 (DVB-S2) and ETSI EN300421 (DVB-S).
2. It is important that when the transmitter is switched on, the selected RF
output connection must have the suitable antenna or must be loaded.
3. The HDT-02 digital camera transmitter applies a MPEG-4 compression to
either HDMI, composite video or SDI input signals. An MPEG-1 layer 2
compression is applied to the corresponding 4 analogue audio channels,
the 2 stereo SDI embedded, the HDMI embedded and the AES digital
audio signals. The resulting multiplexed signal is transmitted using
COFDM modulation system.
4. The HDT-02_H.264 transmitter is available from 1 GHz to 6.4 GHz in
three ranges (1-2.8 GHz, 2.8-4 GHz and 4-6.4 GHz) for the DVB-T2 and
DVB-T RF stage and the L band for the DVB-S2 and DVB-S IF stage.
5. In 1080p Video Format, it can only be performed the Standard Delay,
not the Low Delay, Super Low Delay or Ultra Low Delay.
6. If the RF output is set to DVB-T2 and the bandwidth selected is 1.7 MHz
then, the device automatically disables the Audio2 and it sets the bitrate
of the Audio1 to 128 Kbps.
7. In case it is selected SDI input with 1080p format, the delay will be
automatically Standard.
8. Equipment’s maximum output power for the DVB-T2/T is 100mWatt
(selectable from -5 to +20 dBm) and for the DVB-S2 and DVB-S is from
-20 to + 5 dBm.
9. Special care should be taken with SDI cables, quality and length, these
are very important, especially when HD-SDI or 3G SDI signals are
transmitted.
10.If any audio or data channel are not used in a transmission, they should
be disabled, in order to assign that bitrate to the video and achieve a
higher quality transmitted video signal.
11.Only authorized personnel should open the product and any repair or
warranty will be invalidated if the seals are broken.

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HDT-02_H.264 High Definition Digital Camera Transmitter
USER’S MANUAL V4.11
Safe Operating Procedures
In this section there are shown safety requirements so as to ensure
awareness of potential hazard to the personnel operating and maintaining
the equipment.
FCC
This chapter has been done taking into account the OET bulletin 65, from
August 1997, recommended by the FCC (Federal Communications
Commission).
The HDT-02_H.264 transmitter designed to provide services for
broadcasting, will not create RF energy exceeding 1.0 mW/cm2, the FCC
limit for exposure. This is known as the Maximum Permissible Exposure
(MPE) limit. This transmitter follows this law (with the AVF flexible antenna
3 dBi) as long as the distance between the antenna and the person is at
least 4 cm. In case it is used the PA-5 (5 W power amplifier), the minimum
distance is 28.2 cm and if it is used the PA-10 (10 W power amplifier) the
minimum distance is 39.9cm. SVP Broadcast Microwave, in accordance with
the requirements set forth by the FCC, provides this information as a guide
to the user. Next there are shown the calculations made so as to obtain
those values:
S = MPE in mW/cm2(milliwats per square centimeters)
So as to follow the law, S maximum must be 1.0 mW/cm2
EIRP = P · G
Where:
EIRP: Equivalent isotropically radiated power
G (dBi): Antenna gain in dBi
P: Output power of the transmitter (W)
R: Distance from the antenna to the transmitter (cm)

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USER’S MANUAL V4.11
1. HDT-02 transmitter with AVF antenna (3 dBi)
G = 2
Pmax = 100 mW
EIRP = 200 mW
Rmin = 4 cm = 1.57 in
2. HDT-02 transmitter + PA-5 (5 W) with AVF antenna
G = 2
Pmax = 5000 mW
EIRP = 10000 mW
Rmin = 28.2 cm = 11.1 in
3. HDT-02 transmitter + PA-10 (10 W) with AVF antenna
G = 2
Pmax = 10000 mW
EIRP = 20000 mW
Rmin = 39.9 cm = 15.7 in

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USER’S MANUAL V4.11
Declaration of RF Exposure Compliance for Exemption
from Routine Evaluation Limits
SAR Evaluation –AVF-203L antenna
As shown in the point number 2.5.1 from the RSS-102 Radio Standard
Specification, SAR evaluation is not required if the separation
distance between the user and the radiating element of the device
is more than 20 cm.
The equipment, which consists on the HDT-02 transmitter with the AVF-
203L antenna fixed to it fulfills with this requirement. As shown in the figure
below, the distance between the device’s radiating element (situated at the
top of the antenna) and the nearest part of the user’s body is further than
20 cm length. If the length from the radiating element to the bottom of the
antenna is 20 cm, then the distance between the nearest part of the user’s
body and the radiating element will be higher than 20 cm. As the
cameraman always uses the camera in the same way and the antenna is
fixed to the camera, the distance is always maintained.
Conclusion: This equipment is exempted from SAR evaluation.

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USER’S MANUAL V4.11
SAR Evaluation –AVF-203LB antenna
As shown in the point number 2.5.1 from the RSS-102 Radio Standard
Specification, SAR evaluation is not required if the separation
distance between the user and the radiating element of the device
is more than 20 cm.
The equipment, which consists on the HDT-02 transmitter with the AVF-
203LB antenna fixed to it fulfills with this requirement. As shown in the
figure below, the distance between the device’s radiating element (situated
at the top of the antenna) and the nearest part of the user’s body is further
than 20 cm length. If the length from the radiating element to the bottom
of the antenna is 28 cm, then the distance between the nearest part of the
user’s body and the radiating element will be higher than 28 cm and,
therefore, higher than 20 cm. As the cameraman always uses the camera in
the same way and the antenna is fixed to the camera, the distance is
always maintained.
Conclusion: This equipment is exempted from SAR evaluation.

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USER’S MANUAL V4.11
RF Exposure Evaluation
As shown in the point number 2.5.2 from the RSS-102 Radio Standard
Specification, RF exposure evaluation is required if the separation
distance between the user and the device’s radiating element is greater
than 20 cm, except when the device operates as follows:
-Below 1.5 GHz and the maximum e.i.r.p. of the device is equal
to or less than 2.5 W.
-At or above 1.5 GHz and the maximum e.i.r.p. is equal to or
less than 5 W.
Due to this equipment is going to operate above 1.5 GHz and the maximum
e.i.r.p. is 200 mW (with the AVF-203L or the AVF-203LB antenna), this
equipment is exempted from the RF exposure evaluation. When this
equipment is operating below 1.5 GHz, it is also exempted from the RF
exposure evaluation because the maximum e.i.r.p. (200mW) is lower than
2.5 W.
Conclusion: This equipment is exempted from the RF exposure
evaluation.

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USER’S MANUAL V4.11
First Aid in Case of Electric Shock
DO NOT TOUCH THE VICTIM WITH YOUR BARE HANDS until the circuit is
broken. SWITCH OFF. If this is not possible, PROTECT YOURSELF with DRY
insulating material and pull the victim clear of the conductor.
If breathing has stopped, indicated by unconsciousness, lack of respiratory
movements and a ‘blue’ look to cheeks, lips, ears and nails, START
RESUSCITATION AT ONCE.
EMERGENCY RESUSCITATION –THE EXPIRED AIR METHOD
(Approved by the Royal Life Saving Society)
1. If possible, lie the victim on his back with his head slightly higher
than his feet. Clear the mouth and throat of any obvious obstruction.
2. Kneel on one side of the victim, level with his head. LIFT THE JAW
AND TILT THE HEAD BACK AS FAR AS POSSIBLE (Figs. 1a and 1b)
3. One of the following may happen:
a) Breathing may begin and consciousness return.
b) Breathing may begin but consciousness NOT
return. Turn the victim on his side and ensure
that the airway is kept clear.
c) Breathing may return but be NOISY which
means that the airway is not fully clear. Try to
clear the airway.
4. IF THERE NO SIGN OF BREATHING:
a) Check that the head is still tilted back.
b) Take a deep breath.
c) Pinch the victim’s nose and blow firmly into his
mouth (Fig. 2). As you do, the chest will RISE.
d) Turn your head away and take another breath,
watching for the chest to FALL (Fig. 3).
5. Start with four quick breaths and then continue with
one breath every five seconds (i.e. 12 times a
minute). This should be continued until the victim
revives or a doctor certifies death.
6. As consciousness returns the victim will start to
breathe on his own, and a ‘pink’ color replaces the
‘blue’ look: this is the time to stop resuscitation.
Continue to hold his chin up and so keep the airway
clear.
7. In the case of injuries to the mouth, it may be necessary to use
mouth-to-nose resuscitation. Seal the victim’s mouth with your cheek
and blow firmly into his nose, proceeding as above.

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8. In the case of severe facial injuries it may be necessary to do a
manual method of artificial respiration (Silvester-Brosch or Holger
Nielsen). Briefly, these methods apply compression to ribcage with
the victim lying on his back (S-B) or face down (H.N.) with associated
movement of his arms up and out. The cycle of movement should
take about five seconds, i.e. the normal breathing phase.
9. Whatever the method, it is ESSENTIAL to commence resuscitation
WITHOUT DELAY and to send for medical assistance immediately.
TREATMENT FOR BURNS
If the victim is also suffering from burns, then, without hindrance to
resuscitation, observe the following:
a) DO NOT ATTEMP TO REMOVE CLOTHING ADHERING TO THE BURN.
b) If possible alleviate the pain from the burnt part by immersing in
cold water.
c) If help as available or as soon as resuscitation is no longer required
the wound should be covered with a DRY clean dressing.
d) Oil or grease in any form should not be applied.
e) If severely burnt, get the victim to hospital immediately.

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HDT-02_H.264 High Definition Digital Camera Transmitter
USER’S MANUAL V4.11
Main Index
Chapter 1: Introduction ................................................................... 5
Chapter 2: Technical Features ....................................................... 10
Chapter 3: Transmitter Operation and Menus ................................ 14
3.1 Display..................................................................................14
3.1.1 Main Screen for the DVB-T2 ...............................................17
3.1.2 Main Screen for the DVB-T .................................................19
3.1.3 Main Screen for the DVB-S2 ...............................................21
3.1.4 Main Screen for the DVB-S.................................................23
3.2 Transmission Examples ...........................................................25
3.3 LEDs .....................................................................................28
3.4 Front panel ............................................................................29
3.4.1 ON/OFF Button .................................................................29
3.4.2 OK Button ........................................................................30
3.4.3 Cross Button ....................................................................30
3.4.4 Left and Right Button ........................................................31
3.4.5 Up and Down Button .........................................................31
3.4.6 RF Button.........................................................................32
3.5 Menus ...................................................................................33
3.5.1 Menu Navigation ...............................................................38
3.5.2 Menu Structure.................................................................39
3.5.2.1 Encoder Menu .............................................................40
3.5.2.1.1 SDI Input...............................................................41
3.5.2.1.2 HDMI Input ............................................................43
3.5.2.1.3 CVBS Input ............................................................45
3.5.2.1.4 ASI Input...............................................................47
3.5.2.1.5 Generator Input......................................................48
3.5.2.1.6 Audio1 Embedded ...................................................50
3.5.2.1.7 Audio1 Analogue.....................................................51
3.5.2.1.8 Audio1 AES-EBU .....................................................52
3.5.2.1.9 Audio1 Tone.Gen ....................................................53
3.5.2.1.10 Audio2 Embedded .................................................54
3.5.2.1.11 Audio2 Analogue ...................................................55
3.5.2.1.12 Audio2 AES-EBU ...................................................56
3.5.2.1.13 Audio2 Tone.Gen...................................................57
3.5.2.1.14 Data ....................................................................58
3.5.2.1.15 Encoder Output.....................................................60
3.5.2.1.16 TS Parameters ......................................................61
3.5.2.2 CA-BISS Menu ............................................................64
3.5.2.3 Mod&RF Menu .............................................................66
3.5.2.3.1 DVB-T2..................................................................66
3.5.2.3.2 DVB-T2 Maximum Bitrates .......................................69
3.5.2.3.3 DVB-T ...................................................................70

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3.5.2.3.4 DVB-T Useful Bitrate ...............................................72
3.5.2.3.5 DVB-S2 .................................................................74
3.5.2.3.6 Symbol Rate calculation...........................................78
3.5.2.3.7 DVB-S ...................................................................79
3.5.2.4 Unit Menu...................................................................82
3.5.2.4.1 Profile....................................................................82
3.5.2.4.2 Alarms...................................................................83
3.5.2.4.3 Monitor..................................................................83
3.5.2.4.4 Ethernet ................................................................84
3.5.2.4.5 Firmware ...............................................................85
3.5.2.4.6 Night Mode ............................................................89
3.5.2.4.7 Dist Units...............................................................89
3.5.2.4.8 Keyboard Beep .......................................................89
Chapter 4: GPS Application ............................................................ 90
4.1 Introduction...........................................................................90
4.2 Main Screen...........................................................................90
4.3 GPS Transmitter Screen ..........................................................91
4.4 GPS HDR-106 Receiver Screen .................................................92
4.5 Application Example 1 –Constant Positioning.............................94
Chapter 5: Web Server................................................................... 96
5.1 Introduction...........................................................................96
5.2 Web Page Overview ................................................................97
5.2.1 ENCODER.........................................................................98
5.2.1.1 Video .........................................................................98
5.2.1.2 Audio .........................................................................99
5.2.1.3 Data ..........................................................................99
5.2.1.4 RS-232 .................................................................... 100
5.2.1.5 GPS ......................................................................... 100
5.2.1.6 TS Parameters .......................................................... 101
5.2.1.7 Output ..................................................................... 102
5.2.2 MOD_RF ........................................................................ 103
5.2.2.1 DVB-T ...................................................................... 104
5.2.2.2 DVB-T2 .................................................................... 105
5.2.2.3 DVB-S2 .................................................................... 107
5.2.2.4 DVB-S...................................................................... 109
5.2.3 CA-BISS ........................................................................ 110
5.2.4 UNIT ............................................................................. 111
5.2.4.1 LEDs Status (reading parameters) ............................... 111
5.2.4.2 Alarms (reading parameter)........................................ 112
5.2.4.3 Configuration ............................................................ 112
5.2.4.4 Monitor .................................................................... 112
5.3 Web Page Setup Notes .......................................................... 113
5.4 SNMP .................................................................................. 113
5.4.1 SNMP Commands............................................................ 114
Chapter 6: Remote Control .......................................................... 115
6.1 Introduction......................................................................... 115

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6.2 Application Example.............................................................. 116
Chapter 7: Equipment Installation ............................................... 117
7.1 Introduction......................................................................... 117
7.2 Connections ......................................................................... 117
7.2.1 Input connections ........................................................... 120
7.2.1.1 Power supply ............................................................ 120
7.2.1.2 CVBS/ SDI/ HDMI/ ASI Input ...................................... 121
7.2.1.3 Audio inputs ............................................................. 123
7.2.1.4 Data/GPS input ......................................................... 125
7.2.1.5 RTC connection ......................................................... 126
7.2.1.6 USB connection ......................................................... 127
7.2.1.7 Ethernet................................................................... 127
7.2.2 Output Connections......................................................... 128
7.2.2.1 RF output/Antenna .................................................... 128
7.2.2.2 ASI output................................................................ 129
7.3 Mechanical Accessories.......................................................... 130
7.3.1 Transmitter Fastening...................................................... 130
7.3.2 Battery Fastening............................................................ 132
Index A - PA-5 and PA-10 Power Amplifiers ................................ 133
A.1 Introduction .............................................................................. 134
A.2 Technical Features ..................................................................... 135
A.2.1 Main Characteristics.............................................................. 135
A.2.2 Connections......................................................................... 139
A.2.3 Thermal Protections .............................................................. 141
A.2.4 Before You Connect the Device............................................... 142
A.2.5 Installation .......................................................................... 143
A.3 Power Amplifier Control............................................................. 149
Index B –AVF X03 Flexible Antenna............................................ 150
B.1 Description................................................................................ 150
B.2 Technical Specifications .............................................................. 151
Index C –GPS Antenna................................................................ 153
C.1 Description................................................................................ 153
C.2 Technical Specifications .............................................................. 154
Index D –Modulation Standards.................................................. 156
D.1 DVB-T ...................................................................................... 156
D.1.1 How Does It Works............................................................... 156
D.2 DVB-T2 .................................................................................... 157
D.2.1 How Does It Works............................................................... 157
D.2.2 DVB-T2 New Features........................................................... 157
D.2.3 DVB-T vs DVB-T2 ................................................................. 159

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D.3 DVB-S ...................................................................................... 160
D.3.1 How Does It Works............................................................... 160
D.4 DVB-S2 .................................................................................... 161
D.4.1 How Does It Works............................................................... 161
D.4.2 Pilots in DVB-S2................................................................... 165
D.4.3 DVB-S vs DVB-S2................................................................. 166

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HDT-02_H.264 High Definition Digital Camera Transmitter
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Chapter 1: Introduction
The HDT-02 is the new multifunction and multiband transmitter developed
by SVP Broadcast Microwave. The features of this equipment, achievable
only by SVP, make this transmitter the most advanced in the market up to
the date.
Its feature H.264 encodes for 3G, high definition (HD) and standard
definition (SD) signals with ultra-low latency. H.264 transmission is possible
using 40% lower bitrate than conventional MPEG-2 systems.
This new generation transmitter accepts analogue video, 3G/HD/SD-SDI
and HDMI video input signals. Analogue, SDI embedded, HDMI embedded
and AES audio inputs are available as standard. User data or GPS data can
be transmitted over the data channel.
The ASI output enables the user to use the transmitter as a standalone
encoder.
The HDT-02 transmitter performs DVB-T2 and DVB-T modulations with a
frequency band from 1 GHz to 6.4 GHz. DVB-T enables compatibility with
neatly all types of receivers. DVB-T2 modulation outperforms DVB-T
modulation and offers much higher data rate, which renders in a higher
signal quality or much more robust signal than DVB-T, achieving longer and
more difficult links.
This transmitter also performs DVB-S2 and DVB-S modulation. An L band IF
output is available, which enables the user to use the transmitter as a
satellite Encoder&Modulator unit.
This device has an exceptional RF performance with the highest bandwidth
available. In addition, it also includes up to three eligible frequency bands
for the DVB-T2/T (1 GHz to 2.8 GHz, 2.8 GHz to 4 GHz and 4 GHz to 6.4
GHz) and the L band for the DVB-S2 and DVB-S so as to transmit RF
signals.
Control, operation and monitoring of the HDT-02 transmitter are very
friendly. All the parameters of the transmitter can be configured in field.
Furthermore, 6 presets are configurable for quick equipment set up. A wide
range of accessories allow using this equipment in many different
applications.

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Features
Input video signals, composite video, 3G –SDI, HD-SDI, SD-SDI or HDMI
are MPEG-4 encoded, together with 4 analogue audios, 2 stereo AES/EBU
Channels, HDMI embedded or 4 digital audios embedded on the SDI signal.
The video formats can be 1080p (only in Standard Delay mode), 1080i,
720p, 576i or 480i. This transmitter also has a test pattern and test tone
generator available.
This device has a data channel available that allows transmitting user data
or GPS data as well as a Transport Stream ASI input so it can be used as a
repeater.
The encoder uses a H.264/MPEG-4 Part 10 video compression that provides
output bitrates from 1 Mbps to 100 Mbps and a MPEG-1 Layer II audio
compression which supplies different audio bit rates (128, 192, 256 or 384
Kbps).
Encoded signals can be encrypted using BISS-1 or BISS-E scrambling
system. Encrypted signal will only be received by the receivers that have a
valid descrambling key.
Transmitter system operation is very easy. It has a display and a keyboard
which make possible the configuration and monitorization of every
parameter of the equipment.
The equipment is fed with DC power supply from 7 to 36V. It can be
powered through DC power supply connector or through the battery mount.
Its excellent design, mechanical and electronic assembly make the HDT-02
a robust and reliable solution.
DVB-T2 features
It is available from 1 GHz to 6.4 GHz through three different output bands,
being maximum output power 100mWatt. High quality components have
been used to achieve the best output signal quality.
The HDT-02 digital camera transmitter uses COFDM (Coded Orthogonal
Frequency Division Multiplexing) modulation system (1K, 2K, 4K, 8K,
8K.ext) which provides a superior signal robustness and a higher link
performance. This technology provides operators with efficient means to
overcome the challenges of NLOS propagation and mobile channels
propagation.
OFDM spread spectrum modulation system distributes the data over a large
number of closely-spaced carriers, for example, 1705 carriers in 2K mode.
The data are divided into several parallel data streams, one for each carrier,
so, each carrier transports a lower data rate and the symbol duration is
longer. Each carrier is then modulated with a QPSK, 16QAM, 64QAM or
256QAM scheme with a constellation rotation.

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An OFDM modulated signal, since uses a low symbol rate modulation
scheme (i.e. where the symbols are relatively long compared to the channel
time characteristics) suffer less from intersymbol interference caused by
multipath propagation. As the duration of each symbol is long, it is feasible
to insert a guard interval between the OFDM symbols, thus eliminating the
intersymbol and co-channel interference. So, if one carrier’s information is
lost, it would only be lost a small part of the whole information.
Besides, in OFDM, the sub-carrier frequencies are chosen so that the sub-
carriers are orthogonal to each other, meaning that cross-talk, interference,
between the sub-channels is eliminated. The orthogonality allows high
spectral efficiency.
On the other hand, OFDM system is invariably used in conjunction with
channel coding (forward error correction). The error correction code used in
this equipment is Reed-Solomon coding, which is concatenated with LDPC,
and there is an additional interleaving between the two layers of coding.
Error correcting codes build redundancy into the transmitted data stream.
This redundancy allows bits that are in error or even missing to be corrected
in the receiver.
The European ETSI EN 300755 standard defines the following LDPC coding
rates: 1/2, 3/5, 2/3, 3/4, 4/5, 5/6. There is a compromise between the
coding rate (signal robustness) and the transmitted bit rate. If the coding
rate is higher the signal transmission is more robust (1/2 is the most
robust) but the bit rate that the system is capable to transmit is lower.
Used modulation scheme of each OFDM sub-carrier, QPSK, 16QAM, 64QAM
and 256 QAM is also connected with signal robustness and transmitted bit
rate. QPSK is the most robust and 256QAM is able to transport a higher bit
rate.
Besides the system can define 7 guard intervals: 1/4, 19/128, 1/8, 19/256,
1/16, 1/32 and 1/128. The guard interval is used to reduce intersymbol
interferences due to the multipath propagation.
In addition, it also provides several bandwidths: 1.7, 5, 6, 7 and 8 MHz in
case there are needed for different applications.
To summarize, with all of these characteristics, the maximum bit rate
achieved is 50.3 Mbps.

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DVB-T features
The RF stage of the HDT-02 transmitter is the same as the DVB-T2 one. The
difference is found in the modulation part as is commented bellow.
The HDT-02 digital camera transmitter uses COFDM (Coded Orthogonal
Frequency Division Multiplexing) modulation system (2K mode).
The available modulations are QPSK, 16QAM or 64QAM where the most
robust is the QPSK one and the one with the bigger bit rate is the 64 QAM.
The European ETSI EN 300744 standard defines the following convolutional
coding rates: 1/2, 2/3, 3/4, 5/6, 7/8.
Used modulation scheme of each OFDM sub-carrier, QPSK, 16QAM and
64QAM, is also connected with signal robustness and transmitted bit rate.
QPSK is the most robust and 64QAM is able to transport a higher bit rate.
Besides the system can define 4 guard intervals: 1/4, 1/8, 1/16 and 1/32.
In conclusion, with all of these characteristics, the maximum bit rate
achieved is 31.67 Mbps.
DVB-S2 features
In case the HDT-02 transmitter is needed to be used as a satellite
transmitter, it features an IF stage in the L band with an output power level
from -20 to +5 dBm and a L band output that provides a 10 MHz reference
oscillator.
The HDT-02 digital camera transmitter uses single carrier or one modulation
from the next available: QPSK, 8PSK, 16APSK or 32 APSK where the most
robust is the QPSK one and the one with the bigger bit rate is the 32 APSK.
In addition, the European ETSI EN 302307 standard defines the following
LDPC coding rates: 1/4, 1/3, 2/5, 1/2, 3/5, 2/3, 3/4, 4/5, 5/6, 8/9, 9/10.
In the modulation step it is also included a roll off factor (0.20, 0.25, 0.35)
which is used to reduce intersymbol interference where the value that most
reduces interference but with less bandwith is 0.20.
To sum up, with all of these characteristics, the maximum bit rate achieved
is 31 Msym/s.