Lemco HDMOD-2 User manual

Lemco HDMOD-2 manual v1.0
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1 x HDMI to DVB-T (COFDM)
"Home" modulator
HDMOD-2
Operation Manual

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1. IMPORTANT SAFETY PRECAUTIONS INFORMATION
READ THE FOLLOWING WARNINGS BEFORE YOU USE
YOUR DEVICE
WARNING
The following safety precautions must be observed to prevent fire or electric
shock hazard. Safety precautions include but are not restricted to the following:
Power supply / Mains cord
Operate the unit only within the voltage range defined as appropriate by the
manufacturer.
Occasionally check the power connector and remove dirt or dust that may
have accumulated.
Use only the mains cord that comes with your unit.
Do not operate the unit or plug in the mains cord if it is broken, split, or
damaged in any way.
Do not place the mains cord next to heating devices. Do not pull it, place
heavy objects on it or damage it in any way. Keep it out of reach of children.
Ensure that the device is plugged in a properly grounded socket. Insufficient
grounding may cause electrocution.
Always carefully disconnect all plugs by pulling on the plug and not on the
cord. Make sure the unit's power switch is turned off before removing the
cord from an outlet.
Disconnect the mains cord when the unit is not in use for long periods of time
or during storms.
Do not connect the unit to a multiple-outlet to avoid plug overheating.
Disassembling
This unit contains parts that cannot be repaired by the user. Do not
disassemble or try to repair it as this will void all warranties. Please contact
the manufacturer if you experience any problems with your unit.
Water/humidity
Do not keep the unit in a humid place or near water.
Do not plug/unplug the unit with wet hands.
Fire
Never place a candle or another source of fire on the unit as it may fall and
start a fire.
If the mains cord or the power connector is damaged or destroyed, or if there
is a sudden loss of picture during operation, or if you notice a strange smell or
there is smoke, immediately switch the unit off, disconnect the mains cord and
contact the manufacturer’s technical support department.

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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 first.
When installing the unit, make sure that an outlet is within easy reach. In case
of malfunction, switch the unit off and unplug the power cord. When the unit
is not in use for a long period of time, make sure that the mains cord is
disconnected.
Connectivity
Before connecting the unit to other electronic devices, always switch off and
unplug all devices.
Maintenance
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.
Handling
Do not poke your finger into the openings on your unit.
Never put paper, metal parts or other objects into the openings of your unit. If
you suspect that there are foreign parts in your unit, switch it off and unplug
the mains cord. Contact the manufacturer’s technical support department.
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 HDMOD-2. You now own a high quality, “Home”
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 HDMOD-2 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~35dB) renders the
HDMOD-2 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 HDMOD-2 for advance
programming.
Finally, the HDMOD-2’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 ~ 35dB
RF output frequencies 174...862MHz
H.264 HD encoder bitrate 1-19Mbps
HDCP support
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 HDMOD-2, 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 HDMOD-2 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 HDMOD-2 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 5sec approximately.

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3.2.3 Digital attenuator
The HDMOD-2 has an embedded digital attenuator. The user is able to select between
three different attenuation steps as follows:
1. 0 dB attenuation (Output level: 90dbμV) SSD will display: “00”
2. 10 dB attenuation (Output level: 80dbμV) SSD will display: “10”
3. 25 dB attenuation (Output level: 65dbμV) SSD will display: “25”
3.2.4 HDCP ON/OFF function
By pressing the “Channel / Profile” button for more than 5sec 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 HDMOD-2 will exit from the current
functionality after being idle for more than 2-3sec.
3.2.5 USB interface for advance programming
The HDMOD-2 provides a USB interface with the appropriate software for advanced
programming. For more information please read Appendix A.
3.3 BLOCK DIAGRAM

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3.4 FRONT PANEL
Figure No.1
1. Channel / Profile 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 “Profile” mode is selected
5. Ground connector
6. +12VDC / 1A power input
7. HDMI input
8. USB input
9. RF-OUT output

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3.3 INSTALLATION
The HDMOD-2 can be programmed with one of the following ways:
From the front panel display
From the USB interface
3.3.1 Installation using the Front panel display
The user is able to install very quick and easy multiple HDMOD-2s using the SSD +
Button interface of the front panel of the device, following the steps below:
1st Step
Power up the HDMOD-2 by adding the external power supply. The HDMOD-2 will
need 20-30secs to initialize itself. The SSD (Seven Segment Display –No 2 / Figure
No1 ) depicts the initialization status.
2nd Step
Choose “Chanel mode” by pressing the Channel/Profile button (No 1/ Figure No.1 )
the “Channel LED” will lit indicating that “Channel” selection mode is selected.
3rd Step
Choose “Attenuation mode” by pressing the Channel/Profile button (No 1/ Figure
No.1 ) the “Attenuation LED” will lit indicating that “Attenuation” selection mode is
selected.
4th Step
Choose “Profile mode” by pressing the Channel/Profile button (No 1/ Figure No.1 )
the “Profile LED” will lit indicating that “Profile” selection mode is selected.
How Profiles works
In an installation all the modulators (or Mux in general) need to have different values
of the following fields to avoid conflicts in the automated scan of the TV sets:
Program Name Service ID TS ID
For that reason, the user must always selects a different Profile 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:
Profile Νο 1for the 1st modulator
omeaning: Program Name = DTV 1
omeaning: Service ID = 1
omeaning: TS ID = 2240

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Profile Νο 2for the 2nd modulator
omeaning: Program Name = DTV 2
omeaning: Service ID = 2
omeaning: TS ID = 2241
o
Profile Νο 3for the 3rd modulator
omeaning: Program Name = DTV 3
omeaning: Service ID = 3
omeaning: TS ID = 2242
As a result, all the above modulators have different values in the above fields.
Caution!!!
Every time we choose a different Profile number, the HDMOD-2 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 fields.
3.3.2 Installation using the USB interface
The HDMOD-2 provides a USB interface with the appropriate software for advanced
programming. For more information please 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
Profile: High profile 4.0
Resolution: 1920x1080-30p for HDMI
PAL 720x576@25fps
HDCP support: Yes
Audio: HDMI & Mono/Stereo
Audio encoding: Mpeg2, ACC, AC3
Standard: MPEG-1 Layer II
Audio Bit Rate: 64, 96, 128, 192, 256, 320, 384 kbps
Level: 0.5Vpp to 1.0Vpp adjustable
H.264 Encoder
Standard: MPEG-4 AVC/H.264
Bit Rate: 1 –19 Mb/s adjustable
Configurable Parameters: Service Name, Service ID, Video PID,
Audio PID, PMT PID
Transport Stream Processing
Automatic Regeneration: NIT,PAT,CAT,SDT, PMTs,
EITs tables
Configurable Parameters: TS ID, Original Network ID,
Network ID,Provider Name
LCN support: Yes
LCN Providers: Nordig, ITC/UK, EICTA/Europe,
New Zealand
DVB-T Output
Standard: EN 300 744
Bandwidth: 5,6,7,8 MHz
Mode: 2K,8K
Constellation: QPSK,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…862MHz
Output Level: 90dbμV max.
Connector: 75Ω - F, female
Output Attenuator: 0…25dB
MER: 35dB (Typical)
Shoulder Attenuation: >45dBc
Connectors: 1 x F - female
Programming Interface SSDisplay + keypad
USB interface

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General
Power Supply: +12VDC
Power supply consumption: 340 mA max.
Operating Temperature: 0 ºC to 50 ºC
Storage Temperature: -10 ºC to +70 ºC
Humidity: Up to 90%
Dimensions: 205 x 101,80 x 41mm
Weight: 0.3Kg

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5. DIMENSIONS
*dimensions in mm

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6. LEMCO LIMITED WARRANTY
This Lemco unit is guaranteed against defects in workmanship and materials for a
period of five (5) years beginning on the date of purchase of the product. During the
applicable warranty period, Lemco will repair or replace at our sole option, without
charge, any defective component part of the purchased unit. The unit is to be
delivered packed in adequate packing AFTER an authorization for return has been
received.
The owner’s responsibilities are to use the instrument in accordance with its written
instructions, to provide transport to and from our facilities in the event service is
required, and to provide proof of purchase if requested.
Our warranty does not cover any problem resulting from:
(a) accident; abuse; neglect; shock; electrostatic discharge; heat or humidity beyond
product specifications; improper installation, operation, maintenance or modification
(b) any misuse contrary to the instructions in the user manual
(c) malfunctions caused by other equipment.
WARNING!!
Our limited warranty is considered void if a product is returned with removed,
damaged or tampered labels or any alterations (including removal of any component
or external cover) carried out by unauthorized personnel.
OUT OF WARRANTY SERVICING
We repair and service units of our production even once the warranty has expired, if
this is economically the best solution to the customer.
The mechanical and electronic spare parts are replaceable for a five-year period after
production when the circuits are assembled with discrete components. When
integrated circuits are used, the supply of spare parts is guaranteed up to the depletion
of our stock and, depending on the possibility of procuring them on the worldwide
market.
To avoid any unnecessary loss of time, it is very important that the instrument be
returned to our premises accompanied by a proper delivery note, duly completed with
all the required information, as per the legal dispositions currently enforced.

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7. WARNINGS
Content warning
This document contains preliminary information about a product of Lemco company.
Lemco reserves the right to make any changes or modifications at any time without
prior notice.

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APPENDIX Α
The HDMOD-2 offers a USB interface with the appropriate software (DVProbe.exe)
for advance programming. The software can be downloaded from www.lemco.gr.
System requirements
Windows XP (SP1 or higher)
Windows Vista
Windows 7 (32 & 64bit)
Windows 8 (32 & 64bit)
Windows 10 (32 & 64bit)
Device connection via software
1. Insert the supplied software CD into your CD-ROM drive.
2. Connect the HDMOD-2 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 HDMOD-2 USB drivers.
4. Once Windows have successfully installed the USB drivers of the HDMOD-2,
a pop-up message appears to verify this process.
5. Run the DVProbe.exe file and the main screen will appear (Figure No 2):
Figure No.2

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Software guidelines
1. From the “ComPort” combo box choose the correct USB port that connects
the HDMOD-2 and press “Connect”.
2. Once the software has successfully connected with the device, it will
automatically download all the settings of the HDMOD-2.
3. The DVProbe 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 HDMOD-2 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 first)
3.10 LCN Provider - Set the LCN provider

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* TS ID must always be different between DVB-T modulators in the same network.
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: 8MHz
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 20.107MBps limit, otherwise artifacts may occur.
For example, one valid selection in case of four encoders would be to set each
encoder bitrate to 5Mbps since: 4 x 5Μbps = 20Mbps < 20.107MBps
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 firmware version of the uP
4.3 SW Version –Depicts the software version of the DVProbe
4.4 HW Version –Depicts the hardware version of the HDMOD-2
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.

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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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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

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8. NOTES
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