Lemco Micro Line MLH-300 User manual

© 2020 Lemco. All rights reserved. 1
Manual
v.1.1
www.lemco.gr
DTV - Headend
MLH-300
2 x HDMI to 2 x DVB-T/C or IP
www.lemco.gr

DTV - Headend | MLH-300
Manual
© 2020 Lemco. All rights reserved. 2
Contents
Important safety precautions information p. 3
Introduction p. 5
Installation p. 9
Technical specifications p. 29
Warranty p. 32
Notes p. 37

DTV - Headend | MLH-300
Manual
© 2020 Lemco. All rights reserved. 3
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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Manual
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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-300. 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-300 is a very powerful, all-in-one mini headend device, able to receive up to two (2) HD signals and con-
vert them either in two (2) x DVB-T/C RF output channels or in IPTV streaming using UDP/RTP protocols multicast/
unicast.
It supports “pool” technology, meaning that the user is able to select any program from any of the two (2) inputs
and assign them to any of the two (2) RF or IP outputs providing great flexibility.
The embedded web server of the MLH-300 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-300 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 or IPTV technology.
3.2 - FEATURES
• 2 x HD inputs
• HDCP v1.4 support
• 2 x RF output DVB-T/C (software selectable)
• Gbit IP streaming (up to 64 x SPTS / 4 x MPTS)
• “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-300, 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-300 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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Manual
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3.2.5 – Custom NIT/SDT
Using the MLH-300 the user is able to create custom NIT and SDT tables according to his needs.
3.2.6 – Dual power supplies
The MLH-300 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-300 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 two (2) 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-300 without
the need of any firmware upgrade.
3.2.4 - IP streaming
The MLH-300 is able to make IP streaming of all programs coming from the two (2) x HD inputs using UDP or RTP
protocol in multicast/unicast IP addresses. The max. output bitrate can be up to 480 Mpbs.

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3.3 - BLOCK DIAGRAM
4 x DVB-T/C
IP (up to 64SPTS/4 MPTS)
HDMI
HDMI MLH-300

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

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4. INSTALLATION
4.1 - General
4.2.1 - “General” page
Status - Inputs 1…2
The MLH-300 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…2

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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-300 provides information of all programs that are currently being
distributed via its two RF and IP outputs.
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 two tabs including all the two (2) 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
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.
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 two outputs. By doing the same process for each program, from all inputs the user is able to create the two (2)
custom multiplexes in device’s output.
Caution!
The number of programs that the MLH-300 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 two modulators on MLH-300 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 two (2) x HD inputs and their settings.
For each program the MLH-300 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 two (2) 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
IP mode: The device will work as IPTV streamer
• 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 two outputs of the MLH-300 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 modulator will be automatically set to CH22,
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.
4.2.8 - “IP streaming” page
At “IP streaming” section the user is able to setup the IP streamer of the device (Figure No 11).
In Figure No 11 we have general settings of the IP streamer as follows:
• IP address: This is the IP address of the streamer for ping purposes.
• MAC address: This is the MAC address of the streamer
• Figure No 10
• Figure No 11

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The Status section provides a general view of how many programs and in what format are currently being streamed
from the device is its two outputs (Figure No 12):
In order to setup the IP address for each program there are two tabs one for each IP output of the MLH-300.
By selecting e.g. the TS1 tab (Figure No 12) the user is able to setup the IP streamer for this specific output, following
the steps below:
1st step: Select SPTS or MPTS streaming mode.
SPTS mode: Means that each program has its own IP
MPTS mode: Means that all the programs of the current output (e.g. TS1) will be streamed in a single IP.
2nd step: For each program (in SPTS mode) or for the whole TS (in MPTS mode) the user is able to assign a
multicast IP address from 224.0.0.0 to 239.255.255.255 or a unicast IP address as well as its destination
port and protocol (UDP or RTP).
By repeating the above procedure for all two outputs of the MLH-300, the user is able to setup the IP streamer of
the device.
• Figure No 12

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4.2.9 - “TS settings” page
At this section (Figure 13), the user is able to setup all the TS settings of the two 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 13

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4.2.10 - “NIT” page
At this section (Figure 14), the user is able to create custom NIT table for each of the two 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.
4.2.11 - “SDT” page
At this section (Figure 15), the user is able to create custom SDT table for each of the two 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 14
• Figure No 15