Lemco MLH-101 User manual

© 2020 Lemco. All rights reserved. 1
Manual
v.1.1
www.lemco.gr
DTV - Headend
MLH-101
4 x HDMI to 4 x DVB-T/C
www.lemco.gr

DTV - Headend | MLH-101
Manual
© 2020 Lemco. All rights reserved. 2
Contents
Important safety precautions information p. 3
Introduction p. 5
Installation p. 9
Technical specifications p. 27
Warranty p. 30
Notes p. 35

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1. IMPORTANT SAFETY PRECAUTIONS INFORMATION
READ THE FOLLOWING WARNINGS BEFORE YOU USE YOUR DEVICE
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.
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.
WARNING

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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 for-
eign 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, con-
nectors and switches gently.

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Manual
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2. INTRODUCTION
Congratulations on purchasing the MLH-101. You now own a high quality, professional DTV headend. To get the
most out of your purchase, please take the time to carefully read through this manual.
3. INSTRUCTIONS
3.1 - DESCRIPTION
The MLH-101 is a very powerful, all-in-one mini headend device, able to receive up to four (4) HD signals and con-
vert them either in four (4) x DVB-T/C RF output channels.
It supports “pool” technology, meaning that the user is able to select any program from any of the four (4) inputs
and assign them to any of the four (4) RF outputs providing great flexibility.
The embedded web server of the MLH-101 provides a very friendly user interface as well as the ability of remote or
local control of the device via LAN.
Its small size and its powerful features render the MLH-101 the ideal solution in case we want to distribute HD con-
tent eg. coming from STBs or blue ray to a CATV installation using the DVB-T/C.
3.2 - FEATURES
• 4 x HD inputs
• HDCP v1.4 support
• 4 x RF output DVB-T/C (software selectable)
• “Pool” technology
• MER value > 42dB
• Dual power supplies offering redundancy mode
• Custom NIT/SDT
• Local or remote control via webserver
• Very friendly user interface
• Wall or rack mount options
• Ultra-compact size
• 5-year warranty
3.2.1 - Auto-reset functions and watchdog
During the normal operation of the MLH-101, 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 MLH-101 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.

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3.2.5 – Dual power supplies
The MLH-101 is powered from one or two external power supplies of +12VDC/2.5A. In case we connect two external
power supplies then they will work in redundancy mode. Thus, in case of failure of one of the two external power
supplies the device will continue working without stopping.
3.2.2 - “Pool” technology
The MLH-101 supports “pool” technology, meaning that the user is able to select any TV or Radio program from any
input and assign it to any of the four (4) outputs providing great flexibility.
3.2.3 - DVB-T or DVB-C compliant
The user is able to software select the modulation standard, between DVB-T and DVB-C, of the MLH-101 without
the need of any firmware upgrade.
3.2.4 – Custom NIT/SDT
Using the MLH-101 the user is able to create custom NIT and SDT tables according to his needs.

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3.3 - BLOCK DIAGRAM
4 x DVB-T/C
HDMI
HDMI
HDMI
HDMI MLH-101

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3.4 – Product drawing views
1. HDMI inputs
2. Reset button
3. Status LED
4. LAN control
5. RF output
6. Dual power supply inputs
7. Fan cooler

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4. INSTALLATION
4.1 - General
4.2.1 - “General” page
Status - Inputs 1…4
The MLH-101 has a very friendly interface for programming and monitoring purposes. The user is able to gain
access to the embedded webserver, by opening an Internet browser (e.g. Internet Explorer, Firefox or Chrome) and
type the following static IP: 192.168.1.205.
The default username and password are the following:
Username: admin
Password: 12345
Every time that the user is connected to the device, the “General” page (Figure No 1) is loaded providing a current
general status information of the device.
In these fields, the user is able to see the status of each HD input e.g. if the H.264 encoder is running or if it is in idle
state, its Service name, its Service ID, video/audio PID and LCN number.
4.2 - Embedded Webserver
Status
• Figure No 1
In these fields, the user is able to see the status of all the RF outputs of the device such as modulator’s state, RF
output frequencies and modulation settings.
Outputs – Modulator 1…4

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This section provides general information of the device, like internal status of all device’s modules, CPU temperature
and fan state as well as error codes for troubleshooting purposes.
System
4.2.2 - “Program list” page
In “Program list” page (Figure No 2) the MLH-101 provides information of all programs that are currently being
distributed via its four RF.
At the same time, the device offers the whole channel list to be exported under the follow file types:
• Excel – All the program list is exported in .xlsx format
• CSV – All the program list is exported in .csv format
• M3U – All the program list is exported in .m3u
• Figure No 2

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4.2.3 - “Block diagram” page
The “Block diagram” page (Figure No 3) provides a general view of device’s internal modules and architecture.
All icons are clickable providing the ability to the user to go directly to the setup page of all internal modules of the
device. The grey icons mean that the current module is disabled.
• Figure No 3

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Setup
4.2.4 “Input” page
In the “Input page” (Figure No 4) the user is able to setup each HD input independently.
• Figure No 4

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There are four tabs including all the four (4) HD inputs. For each tuner the user needs to program the following
fields:
1. Input Enabled/Disabled - Enable or disable the specific HD input
2. Service Name – Insert the preferred service name
3. Service ID – Insert the service ID number
4. Video Bitrate – Set the video bitrate (2000-19000 Kbps)
5. Audio Bitrate – Set the audio bitrate (64,96,128,192,256,320 Kbps)
6. Audio encoding – Set the audio encoding (AAC, AC3, MPEG2)
7. HDCP – Enable/disable the HDCP function
8. LCN – Set the LCN number
9. PMT PID – Set the PMT PID
10. Video PID – Set the Video PID
11. Audio PID – Set the Audio PID
Once all settings are being written, the user must click the “Apply” button for the settings to be saved.
Encoder status
For each HD input the MLH-101 provides its current state e.g. if it is running or if it is in idle state.
4.2.5 - “Program Selection” page
In the “Program Selection” section (Figure No 5) the user is able to select any program from any input and assign it
to any output using the “pool” technology.
• Figure No 5

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Using the Drop down menu from “Output” column (Figure No 6) the user is able to assign any program to any of
the four outputs. By doing the same process for each program, from all inputs the user is able to create the four (4)
custom multiplexes in device’s output.
Caution!
The number of programs that the MLH-101 can distribute on its output depends on the video bitrate that the user
selects for each program.
For example, if we select the following DVB-T setting for the four modulators on MLH-101 outputs:
• Constellation: 64 QAM
• Guard Interval: 1/32
• Code rate: 7/8
• Bandwidth: 8MHz
According to Appendix A we will have a total output bitrate of 31.67Mbps/ modulator. That means that we can
select as many programs but their total bitrate must not exceed the 31.67Mbps, otherwise artifacts may occur.
The status section in (Figure No 7) provides a general idea to the user of the current payload (according to the
selected programs) comparing to the max. output payload.
It is recommended that the user must not exceed the 85% from each output, since all the bitrate are variable
according to their specific content.
This page depicts all programs coming from the four (4) x HD inputs and their settings.
For each program the MLH-101 provides the following information:
• Service Name – which is the name of the program
• Service ID – which is the Service ID number of the program
• LCN No – which is the logic channel number of the program
• Bandwidth – which is the bitrate of the program
• Figure No 6
• Figure No 7

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Peak Detection mechanism
As shown in Figure No 7 there is a colored indicator of the peak detection mechanism, for each output transport
stream. This indicates if any overflow has occurred on modulator’s output bitrate with the following colors:
• Green – No overflow occurred
• Yellow – No overflow occurred but the input bitrate is close to the output bitrate
• Red – Overflow occurred. The user must decrease the input bitrate
4.2.6 - “Output” page
At the “RF Output” page the user is able to select in which modulation standard the four (4) output modulator will
operate (Figure No8).
DVB-T: 4 x modulator working in DVB-T standard
DVB-C: 4 x modulator working in DVB-C standard
• Figure No8

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4.2.7 - “RF Output” page
At the “RF Output” page (Figure No 9) the user is able to setup the RF output settings of the device.
For each modulator in DVB-T mode the user is able to setup the following parameters:
• Channel – The output channel for the first modulator*
• Frequency – The output frequency of the first modulator*
• Constellation – The constellation of the first modulator*
• Code Rate – The coder rate of the first modulator*
• Guard Interval - The guard interval of the first modulator*
• Channel Bandwidth – The channel bandwidth of the first modulator*
• Modulation – The modulation type of the first modulator*
• Enable/Disable – Enable or disable the current modulator
• Output level – Adjust the output level for each modulator from 70-90dΒμV.
* All the four outputs of the MLH-101 operate in adjacent RF output channels. This means that the user setups
only the first modulator and all the other three modulators have the same settings and automatically are being
programmed in adjacent channels.
E.g. If the user sets the CH21 in UHF band on modulator No1 the other three modulators will be automatically set
to CH22, CH23 and CH24, respectively.
• Figure No 9

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The status section in (Figure No 10) provides a general idea to the user of the current payload (according to the
selected programs) comparing to the max. output payload.
It is recommended that the user must not exceed the 85% from each output, since all the bitrate are variable
according to their specific content.
• Figure No 10
4.2.8 - “TS settings” page
At this section (Figure 11), the user is able to setup all the TS settings of the four multiplexes at device’s output.
For each multiplex output the user can setup the following settings:
TS ID: Which is the ID No of the specific multiplex (1…65535)
Net ID: Which is the Net ID No of the specific multiplex (1…65535)
Original Net ID: Which is the Org. Net ID No of the specific multiplex (1…65535)
Network Name: Which is the network name of the specific multiplex
NIT: Select from Global, Default and Custom options
NIT version Select the NIT version
Global NIT: Select the input source of Global NIT. In this case NIT will be the same for all outputs.
LCN provider: Choose the appropriate LCN provider (EACEM, ITC, Nordig, APN)
• Figure No 11

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4.2.9 - “NIT” page
At this section (Figure 12), the user is able to create custom NIT table for each of the four outputs of the device.
Moreover, this section offers the ability to export / import a NIT table.
For more information on how to create a custom NIT table please refer to “Lemco NIT creation guidelines.pdf”
document in Lemco’s website.
4.2.10 - “SDT” page
At this section (Figure 13), the user is able to create custom SDT table for each of the four outputs of the device.
Moreover, this section offers the ability to export / import a SDT table.
For more information on how to create a custom SDT table please refer to “Lemco SDT creation guidelines.pdf”
document in Lemco’s website.
• Figure No 12
• Figure No 13

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System
4.2.11 - “Event log” page
At “Event log” page (Figure No 14) the system logs all the events occurs in the device during its operation. These logs
are divided in three different categories based on their priority as follow:
• High – Using the red color the system logs the events which are of high priority.
• Medium – Using the orange color the system logs the events which are of medium priority.
• Low – Using the red color the system logs the events which are of low priority.
The user has the ability to select which kind of events to display as well as the device gives the opportunity to
export these logs as follow:
• Excel – All the program list is exported in .xlsx format
• CSV – All the program list is exported in .csv format
• Figure No 14

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4.2.12 - “LAN” page
At “LAN” page (Figure No 15) the user is able to setup all the parameters of the LAN control of the device as follows:
• DHCP – Enable or disable DHCP
• IP address: Set a static IP address for controlling the device
• Subnet mask: Set the specific Subnet mask
• Gateway: Set the gateway’s IP address
• Primary DNS: Set the IP address of the primary DNS
• Secondary DNS: Set the IP address of the secondary DNS
• Port: Assign the control port
• MAC address: Depicts the MAC address of the LAN control
• Figure No 15