Lemco HDMOD-Q1 User manual

Lemco HDMOD-Q1 manual v1.0
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4x HDMI to 4x DVB-T (COFDM)
"Home" modulator
HDMOD-Q1
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-Q1. 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-Q1 is a high quality quad DVB-T "Home" modulator which accepts
four HDMI inputs and converts them into four RF DVB-T channels on its output. The
excellent picture (Full HD 1920*1080-30p) and modulation quality (MER~35dB)
renders the HDMOD-Q1 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-Q1 for advance
programming.
Finally, the HDMOD-Q1’s metal case provides excellent electromagnetic shielding as
well as great temperature dissipation and rigidness.
3.2 FEATURES
•4 x DVB-T RF out
•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
•User friendly 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-Q1, 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-Q1 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-Q1 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

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button interface is locked. To unlock it, the user must press simultaneously the UP +
DOWN buttons for 5sec approximately.
3.2.3 Digital attenuator
The HDMOD-Q1 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-Q1 will exit from the current
functionality after being idle for more than 2-3sec.
3.2.5 USB interface for advance programming
The HDMOD-Q1 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

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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. Modulator selection button
6. HDMI input for modulator Νο 1
7. HDMI input for modulator Νο 2
8. USB port for advanced programming
9. HDMI input for modulator Νο 3
10. HDMI input for modulator Νο 4
11. +12VDC / 2A PSU input
12. Choice indication LED for modulator Νο 3
13. Choice indication LED for modulator Νο 4
14. Choice indication LED for modulator Νο 1
15. Choice indication LED for modulator Νο 2
3.3 INSTALLATION
The HDMOD-Q1 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-Q1s using the SSD +
Button interface of the front panel of the device, following the steps below:
1st Step
Power up the HDMOD-Q1 by adding the external power supply. The HDMOD-Q1
will need 40-50secs to initialize itself. The SSD (Seven Segment Display –No 2 /
Figure No1 ) depicts the initialization status.
2nd Step
Choose a modulator by pressing the MOD Select button (No 5/ Figure No.1). The
LED display will turn on depending on the modulator that is selected.
3rd Step
Choose “Channel mode” by pressing the Channel/Profile button (No 1/ Figure No.1 )
The “Channel LED” will lit indicating that “Channel” selection mode is selected.
4th 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.

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5th 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.
6th Step
Repeat the procedure from step Νο 2 up to step Νο 5 for the rest of the modulators of
the HDMOD-Q1.
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 select 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
•Profile Νο 2for the 2nd modulator
omeaning: Program Name = DTV 2
omeaning: Service ID = 2
omeaning: TS ID = 2241
•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-Q1 will apply
a full reset to itself that will last for 40-50 seconds.
•Using the USB interface, we have the ability to add custom values to the
above fields.

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3.3.2 Installation using the USB interface
The HDMOD-Q1 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: 4 x HDMI
Connector: 4 x HDMI Type A
Video coding: MPEG-4 AVC/H.264
Profile: High profile 4.0
Resolution: Up to 1920x1080-30p
HDCP support: Yes
Audio: HDMI
Audio encoding: MPEG2, ACC, AC3
Standard: MPEG-1 Layer II
Audio Bit Rate: 64, 96, 128, 192, 256, 320, 384 kbps
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: 4 x RF DVB-T (COFDM)
Output frequencies: 174…862MHz
Output level: 4 x 90dbμV max.
Connector: 75Ω - F, female
Output attenuator: 0…25dB
MER: 35dB (Typical)
Shoulder attenuation: >45dBc
Connectors: 1 x F - female
Programming interface Seven Segment Display + keypad
USB interface