Terra MHD101 User manual

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1 x HDMI to DVB-T (COFDM)
"Home" modulator
MHD101
Operation Manual
MHD101 manual v1.3

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1. IMPORTANT SAFETY PRECAUTIONS INFORMATION
READ THE FOLLOWING WARNINGS BEFORE YOU USE YOUR DEVICE
To avoid electric shock and prevent re follow instructions:
● Operate the unit only within mains voltage range dened on external power supply.
● To disconnect the modulator from the mains completely, disconnect external power supply from the mains socket.
● The mains socket must be easily accessible;
● Disconnect the external power supply from the mains when the unit is not in use for long periods of time or during
storms.
● Any repairs must be done by a qualied personnel.
● The modulator shall not be exposed to dripping or splashing water and no objects lled with liquids, such as
vases, shall be placed on it.
● Avoid placing the modulator next to central heating components and in areas of high humidity.
● Do not plug/unplug the external power supply with wet hands.
● No naked ame sources, such as lighted candles, should be placed on the modulator.
● If the modulator has been kept in cold conditions for a long time, keep it in a warm room no less than 2 hours
before plugging into the mains.
● Do not insert any objects into ventilation openings.
● The ventilation should not be impeded by covering the ventilation openings with items, such as newspapers,
table-cloths, curtains.
● Mount the modulator in vertical position with RF connections underneath.
● From top, front and bottom of installed modulator must be at least 10 cm free space.
Installation / Storage
● This unit contains high precision pieces of electronics. To ensure optimal performance and avoid damage, do
not store it in any location where it may collect dirt, duct, lint, etc. Do not expose it to extreme heat or cold (e.g.
in direct sunlight, near a heater or in the car during the day). Place the unit in a secure place to avoid falls.
● Before moving the unit, always unplug all cords rst.
● In case of malfunction, unplug the external power supply from the mains. When the unit is not in use for a long
period of time, make sure that external power supply is disconnected from the mains.
● Before connecting the unit to other electronic devices, always switch off and unplug all devices.
● Do not spill liquids on the unit. Do not use any diluents or volatile liquid to clean the unit. Instead, use a soft
slightly damp cloth and allow the unit to dry completely before using again.
● Do not step on or place heavy objects on top of the unit. To avoid hardware damage, handle all buttons,
connectors and switches gently.

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2. INTRO
Congratulations on purchasing the MHD101. You now own a high quality, professional DVB-T HD modulator. To get
the most out of your purchase, please take the time to carefully read through this manual.
3. INSTRUCTIONS
3.1 DESCRIPTION
The MHD101 is a high quality DVB-T “Home” modulator which accepts one HDMI and converts it into one RF DVB-T
channel on its output. The excellent picture (Full HD 1920*1080-30p) and modulation quality (MER~35 dB) renders
the MHD101 the ideal solution for distributing SD/HD digital signals coming from e.g. a DVD player, STB or camera
in a CATV network using the DVB-T technology.
The user has the ability to control the device by either using the onboard SSD (Seven Segment Display) interface and
keypad for quick installation or by using the USB interface with the appropriate software accompanying the MHD101
for advance programming.
Finally, the MHD101’s metal case provides excellent electromagnetic shielding as well as great temperature
dissipation and rigidness.
3.2 FEATURES
● High quality and performance
● Very clean RF spectrum
● MER value ~ 35 dB
● RF output frequencies 174...862 MHz
● H.264 HD encoder bitrate 1-19 Mbps
● Very friendly user interface for quick installation
● USB interface for advanced programming
● External power supply
3.2.1 Auto-reset functions and watchdog
During the normal operation of the MHD101, the main CPU monitors all the internal parts in order to ensure that the
device works normally. In case of an internal error or module failure, the MHD101 immediately initiates the recovery
procedure by resetting the appropriate module or the device. Finally, watchdog timers ensure that the device will be
reset in case of CPU failure.
3.2.2 Buttons lock-mechanism
The MHD101 will lock the functionality of its buttons after 5 min idle time to avoid of being pushed accidentally. Two
red dots on the SSD notify the user that the button interface is locked. To unlock it, the user must press simultaneously
the UP + DOWN buttons for 5 seconds.
3.2.3 Digital attenuator
The MHD101 has an embedded digital attenuator. The user is able to select between three different attenuation steps
as follows:
1. 0 dB attenuation (Output level: 90 dBμV) SSD will display: “00”
2. 10 dB attenuation (Output level: 80 dBbμV) SSD will display: “10”
3. 25 dB attenuation (Output level: 65 dBμV) SSD will display: “25”
3.2.4 HDCP ON/OFF function
By pressing the “Channel / Prole” button for more than 5 sec the user enables the HDCP ON/OFF function. The SSD
will display this status as follows:
1. H1 : Indicating that the HDCP is ON
2. H0 : Indicating that the HDCP is OFF
Using the Up/Down buttons the user is able to select one of the above status to enable/disable the HDCP function.
The MHD101 will exit from the current functionality after being idle for more than 2-3 sec.
3.2.5 USB interface for advance programming
The MHD101 provides a USB interface with the appropriate software for advanced programming. For more information
read Appendix A.

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3.3 BLOCK DIAGRAM
3.4 FRONT PANEL
Figure 1. Front panel operating controls
1. Channel or Prole selection button
2. Seven Segment Display (SSD)
3. UP / DOWN buttons
4. LED indicators
a. Lock: ON when HDMI communication have been established
b. Channel: ON when “Channel” mode is selected
c. Attenuation: ON when “Attenuator” mode is selected
d. Channel: ON when “Prole” mode is selected
5. Ground connector
6. +12 V DC power input
7. HDMI input
8. USB input
9. RF OUT output
HDMI
USB
RF OUT
Lock
Attenuator
Profile
Channel
12V 0.34 Amax
Channel/
Profile
DVB-T Full HD Modulator MHD101
MPEG-4 encoder AVC/H.264
Output freq. range 174-862 MHz
Output level 90 dBμV max
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2345
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3.5 INSTALLATION
The MHD101 can be programmed with one of the following ways:
● From the front panel display
● From the USB interface
3.5.1 Installation using the Front panel display
The user is able to install very quick and easy multiple MHD101s using the SSD + Button interface of the front panel
of the device, following the steps below:
1st Step
Power up the MHD101 by adding the external power supply. The MHD101 will need 20-30 seconds to initialize itself.
The SSD (Seven Segment Display – No2/Figure 1.) depicts the initialization status.
2nd Step
Choose “Channel mode” by pressing the Channel/Prole button (No 1 / Figure 1. ) and the “Channel LED” will lit
indicating that “Channel” selection mode is selected.
3rd Step
Choose “Attenuation mode” by pressing the Channel/Prole button (No 1 / Figure No.1 ) the “Attenuation LED” will
lit indicating that “Attenuation” selection mode is selected.
4th Step
Choose “Prole mode” by pressing the Channel/Prole button (No 1 / Figure 1.) and the “Prole LED” will lit indicating
that “Prole” selection mode is selected.
How Proles works
In an installation all the modulators (or Mux in general) need to have different values of the following elds to avoid
conicts in the automated scan of the TV sets:
Program Name Service ID TS ID
For that reason, the user must always selects a different Prole number in every modulator starting from Number #1.
Eg. Let’s say we want to install three modulators in a CATV network. In step No 4 we will choose:
● Prole Νο 1 for the 1st modulator
o meaning: Program Name = DTV 1
o meaning: Service ID = 1
o meaning: TS ID = 2240
● Prole Νο 2 for the 2nd modulator
o meaning: Program Name = DTV 2
o meaning: Service ID = 2
o meaning: TS ID = 2241
● Prole Νο 3 for the 3rd modulator
o meaning: Program Name = DTV 3
o meaning: Service ID = 3
o meaning: TS ID = 2242
As a result, all the above modulators have different values in the above elds.
Caution!!!
● Every time we choose a different Prole number, the MHD101 will apply a full reset to itself that will last for 20-30
seconds.
● Using the USB interface, someone has the ability to add custom values to the above elds.
3.5.2 Installation using the USB interface
The MHD101 provides a USB interface with the appropriate software for advanced programming. For more information
read Appendix A.

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4. TECHNICAL SPECIFICATIONS
Input
Type: 1 x HDMI
Connector: 1 x HDMI Type A
Video coding: MPEG-4 AVC/H.264
Prole: High prole 4.0
Resolution: 1920x1080-30p for HDMI
Audio: HDMI & Mono/Stereo
Standard: MPEG-1 Layer II
Audio Bit Rate: 64, 96, 128, 192, 256, 320, 384 kbps
Level: 0.5 Vpp to 1.0 Vpp adjustable
H.264 Encoder
Standard: MPEG-4 AVC/H.264
Bit Rate: 1 – 19 Mb/s adjustable
Congurable Parameters: Service Name, Service ID, Video PID, Audio PID, PMT PID
Transport Stream Processing
Automatic Regeneration: NIT, PAT, CAT, SDT, PMTs, EITs tables
Congurable Parameters: TS ID, Original Network ID, Network ID, Provider Name
LCN support: Yes
LCN Providers: Nordin, ITC/UK, EICTA/Europe, New Zealand
DVB-T Output
Standard: EN 300 744
Bandwidth: 5,6,7,8 MHz
Mode: 2K, 8K
Constellation: 16QAM, 64QAM
Guard Interval: 1/4, 1/8, 1/16, 1/32
Code Rate: 1/2, 2/3, 3/4, 5/6, 7/8
RF Output
Type: RF DVB-T (COFDM)
Output Frequencies: 174…862 MHz
Output Level: 90 dBμV max.
Connector: 75Ω - F, female
Output Attenuator: 0…25 dB
MER: 35 dB (Typical)
Shoulder Attenuation: >45 dBc
Connectors: 1 x F - female
Programming Interface SSDisplay + keypad, USB interface
General
Supply voltage: +12 V DC
Current consumption: 340 mA max.
Operating Temperature: 0 ºC to 50 ºC
Storage Temperature: -10 ºC to +70 ºC
Humidity: up to 90%
Dimensions: 166 x 109,5 x 30 mm
Weight: 0.25 kg

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5. LIMITED WARRANTY
This unit is guaranteed against defects in workmanship and materials for a period of two (2) years beginning on the
date of purchase of the product. During the applicable warranty period, producer will repair or replace at our sole
option, without charge, any defective component part of the purchased unit.
APPENDIX Α
The MHD101 offers a USB interface with the appropriate software (TERRA GUI.exe) for advance programming. The
software can be found in the CD that accompanies the MHD101.
System requirements
● Windows XP (SP1 or higher)
● Windows Vista
● Windows 7 (32 & 64 bit)
● Windows 8 (32 & 64 bit)
● Windows 10 (32 & 64 bit)
Device connection via software
1. Insert the supplied software CD into your CD-ROM drive.
2. Connect the MHD101 via the USB cable (A-male to B-male type)
3. In case Windows cannot install the USB drivers automatically, when prompt, insert the correct path of the CD folder
named “USB drivers”, which contains the MHD101 USB drivers.
4. Once Windows have successfully installed the USB drivers of the MHD101, a pop-up message appears to verify this
process.
5. Run the TERRA GUI.exe le and the main screen will appear (Figure 2.):
Figure 2. Main screen
TERRA GUI

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Software guidelines
1. From the “ComPort” combo box choose the correct USB port that connects the MHD101 and press “Connect”.
2. Once the software has successfully connected with the device, it will automatically download all the settings of the
MHD101.
3. The TERRA GUI consists of four sub-categories as described below:
● DVB-T Settings – Parameters regarding the modulator part
● Encoder Settings – Parameters regarding the H.264 encoder
● Multiplexer Settings – Parameters regarding the multiplex part
● System Settings – Parameters regarding system information
1. DVB-T Settings
In this category the user is able to adjust several parameters of the modulator RF output part, as described below:
1.1 Channel - Output channel selection (VHF:5-12 & UHF:21-69)
1.2 Bandwidth - Bandwidth selection
1.3 Constellation - Constellation selection
1.4 Modulation - Modulation selection
1.5 Guard Interval - Guard Interval selection
1.6 Code rate - Code rate selection
2. Encoder settings
In this category the user is able to adjust parameters of the H.264 encoder, as described below:
2.1 Input source - Select the primary input source
2.2 Video BR (Mpbs) - Set the video bitrate
2.3 Audio BR (Kbps) - Set the audio bitrate
2.4 Audio Encoding – Select the audio encoding
2.5 HDCP ON/OFF – Enables/disables HDCP
3. Multiplexer settings
In this category the user is able to adjust parameters of the MHD101 multiplexer, as described below:
3.1 Network Name + ID - Enter the Network name + ID*
3.2 Program Name + ID - Enter the Program name + ID
3.3 Provider Name - Enter the Provider name
3.4 Original Net ID - Set the Net ID (0-65535)*
3.5 TS ID - Set the Transport Stream ID (0-65535)*
3.6 PMT PID - Set the PID value
3.7 Video PID - Set the Video PID value
3.8 Audio PID - Set the Audio PID value
3.9 LCN No - Set the LCN No (1-999) (must be enabled rst)
3.10 LCN Provider - Set the LCN provider
Caution!!!
● Modulation settings must be applied with care and in order to have adequate output bitrate. The output bitrate (which
can be calculated from the tables in Appendix B) must be equal or greater than the total sum of the bitrate of the encoders.
Example: Assuming we select the following modulation settings:
Modulation: 8K
Constellation: 16-QAM
Code Rate: 5/6
Guard Interval: 1/32
Bandwidth: 8 MHz
We have an output bitrate of 20.107 Mbps according to Appendix B.
This means that encoder’s bitrate must be adjusted in such a way that the total bitrate of the encoder does not exceed
the 20.107 Mbps limit, otherwise artifacts may occur.
For example, one valid selection in case of four encoders would be to set each encoder bitrate to 5 Mbps since:
4 x 5 Μbps = 20 Mbps < 20.107 Mbps
* TS ID must always be different between DVB-T modulators in the same network.

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4. System Settings
This category depicts information about the system’s settings as follows:
4.1 Status - Depicts the status of the modulator (Idle or Running)
4.2 FW Version - Depicts the rmware version of the uP
4.3 SW Version - Depicts the software version of the TERRA GUI
4.4 HW Version - Depicts the hardware version of the MHD101
4.5 Serial number - Depicts the serial number of the device
Buttons
● By pressing the “Get” button in any sub-category, all the settings of this category are downloaded from the modulator.
● By pressing the “Apply” button in any sub-category, all the settings of this category are uploaded to the modulator.
● The “Factory Defaults” button sets the modulator’s setting to factory default.
● The “Reset System” button applies a reset to the modulator.
This product complies with the relevant clauses of the European Directive 2002/96/EC. The unit must be recycled or discarded
according to applicable local and national regulations.
Equipment intended for indoor usage only.
Functional grounding. Connect to the main potential equalization.
This product is in accordance to following norms of EU: EMC norm EN50083-2, safety norm EN60065, RoHS norm EN50581.
This product is in accordance with Custom Union Technical Regulations: “Electromagnetic compatibility of technical equipment“
CU TR 020/2011, “On safety of low-voltage equipment“ CU TR 004/2011.

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APPENDIX B
DVB-T bitrates (Mbit/s) for 8 MHz bandwidth (non-hierarchical systems).
Modulation Coding
Rate
Guard Interval
1/4 1/8 1/16 1/32
QPSK 1/2 4.976 5.529 5.855 6.032
2/3 6.635 7.373 7.806 8.043
3/4 7.465 8.294 8.782 9.048
5/6 8.294 9.216 9.758 10.053
7/8 8.709 9.676 10.246 10.556
16-QAM 1/2 9.953 11.059 11.709 12.064
2/3 13.271 14.745 15.612 16.086
3/4 14.929 16.588 17.564 18.096
5/6 16.588 18.431 19.516 20.107
7/8 17.418 19.353 20.491 21.112
64-QAM 1/2 14.929 16.588 17.564 18.096
2/3 19.906 22.118 23.419 24.128
3/4 22.394 24.882 26.346 27.144
5/6 24.882 27.647 29.273 30.160
7/8 26.126 29.029 30.737 31.668

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DVB-T bitrates (Mbit/s) for 7 MHz bandwidth (non-hierarchical systems).
Modulation Coding
Rate
Guard Interval
1/4 1/8 1/16 1/32
QPSK 1/2 4.354 4.838 5.123 5.278
2/3 5.806 6.451 6.830 7.037
3/4 6.532 7.257 7.684 7.917
5/6 7.257 8.064 8.538 8.797
7/8 7.620 8.467 8.965 9.237
16-QAM 1/2 8.709 9.676 10.246 10.556
2/3 11.612 12.902 13.661 14.075
3/4 13.063 14.515 15.369 15.834
5/6 14.515 16.127 17.076 17.594
7/8 15.240 16.934 17.930 18.473
64-QAM 1/2 13.063 14.515 15.369 15.834
2/3 17.418 19.353 20.491 21.112
3/4 19.595 21.772 23.053 23.751
5/6 21.772 24.191 25.614 26.390
7/8 22.861 25.401 26.895 27.710

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Draugystes str. 22, LT-51256 Kaunas, Lithuania, tel.: +370 37 - 31 34 44, fax: +370 37 - 31 35 55
E-mail: [email protected], http://www.terraelectronics.com
DVB-T bitrates (Mbit/s) for 6 MHz bandwidth (non-hierarchical systems).
Modulation Coding
Rate
Guard Interval
1/4 1/8 1/16 1/32
QPSK 1/2 3.732 4.147 4.391 4.524
2/3 4.976 5.529 5.855 6.032
3/4 5.599 6.221 6.587 6.786
5/6 6.221 6.912 7.318 7.540
7/8 6.532 7.257 7.684 7.917
16-QAM 1/2 7.465 8.294 8.782 9.048
2/3 9.953 11.059 11.709 12.064
3/4 11.197 12.441 13.173 13.572
5/6 12.441 13.824 14.637 15.080
7/8 13.063 14.515 15.369 15.834
64-QAM 1/2 11.197 12.441 13.193 13.572
2/3 14.929 16.588 17.564 18.096
3/4 16.796 18.662 19.760 20.358
5/6 18.662 20.735 21.995 22.620
7/8 19.595 21.772 23.053 23.751