ALCAD DMH-542 Digital Modulator Instruction Manual

: August 28, 2024
: ALCAD

Table of Contents

ALCAD DMH-542 Digital Modulator
Product Usage Instructions
Frequently Asked Questions
GUIDE
FEATURES
OSD MENU INSTRUCTION
TECHNICAL SPECIFICATION
Documents / Resources

ALCAD DMH-542 Digital Modulator

ALCAD-DMH-542-Digital-Modulator-PRODUCT

Product Usage Instructions

Safety Instructions

Before installation, please read and follow the important safety instructions provided in the manual to ensure safe operation of the product.

Quick Install

To quickly install the product, select either QAN-128 or QAM-256 as per your preference.

TS Settings and System Setup

Adjust the TS settings and system setup parameters according to your requirements for DVB-T, DVB-C, or ISDB-T.

HDMI Input

For HDMI input, ensure the H.264 encoding is within the specified bitrate range and select the appropriate resolution based on your display device.

Frequently Asked Questions

Q: What is the purpose of this product?

A: This product is a composite video input standard definition DVB-T/DVB-C/ISDB-T HD modulator designed to provide COFDM RF signal in the frequency range of 50-860MHz for transporting AV/HD signals from various sources to a TV or set-top-box.

Q: What are the supported input modes and parameters?

A: The product supports various input modes such as DVB-T, DVB-C, and ISDB-T with specific bandwidths, modes, FEC values, guard intervals, MER levels, and output frequencies.

Q: How can I connect external devices to this modulator?

A: External devices can be connected through interfaces like CVBS, HDMI input, or RF output ports based on the requirements of the setup.

Q: What power supply does this product require?

A: The product requires a DC power supply of 12V with a current rating of 1.5A for proper operation.

Q: Can this modulator be used to increase the number of channels in an SMATV system?

A: Yes, this modulator can be used in series with others to expand the number of channels transmitted over a coaxial cable in a SMATV system.

GUIDE

IMPORTANT SAFETY INSTRUCTIONS

Thank you for choosing our product. Before installation, we would like to remind you of some notes, which are very important for operating safely and properly, as follows.
Be sure to read this user manual before starting your operation.
When the unit is suddenly moved to a hot area from a cold area, it may cause some problems. In that case, turn off the power, and turn it on again after 1-2 hours.
Keep the modulator placed in a clean space with sufﬁcient ven-tilation.
Do not cover the modulator with or place it on a unit that emits heat.
Clean the case with a soft cloth with a little washing liquid.
Do not remove the cover.
Do not let the unit be exposed to extreme heat, cold, or humid conditions.
No liquids or any other materials to come inside of the unit.

GENERAL DESCRIPTION

This is a composite video input standard deﬁnition DVB-T/DVB-C/ISDB-T(Optional) HD modulator which provides COFDM RF signal in a range of 50-860MHz.
It is designed to achieve AV/HD input, and it only supports standard H.264 encoding.
It is an excellent choice to transport AV/HD signals from TV satellite receivers, surveillance cameras, or video/media players to an LCD TV or set-top-box.
It can be used in series with another modulator so the number of channels in the coaxial cable in the SMATV system can be increased as desired.

PRODUCT OVERVIEW & ILLUSTRATION

No.	Description	Function
1	LCD Screen	Menu display
2	PWR	Power indicator light
3	CVBS	CVBS indicator light
4	RETURN	Return submenu and save settings
5	OK	Conﬁrm the current operation
6	▲	Change the frequency point or cursor up
7	►	Switch settings in the menu or cursor right
8	▼	Change the frequency point or cursor down
9	◄	Switch settings in the menu or cursor left
10	RF OUT	Rf output port
11	ANT IN	External digital signal input port
No	Description	Function
---	---	---
12	VIDEO IN	Video signal input port
13	AUDIO IN	Audio signal input port
14	DC 12V IN	Connect to Adaptor Input
15	HD IN	HD signal input port
16	HD	HD indicator light
17	PC	Software upgrade port

FEATURES

High level of integration, high-performance, Full-featured, integrated design
Single input modulator that converts AV/HD source to a DVB-T/DVB-C/ISDB-T channel
Standard COFDM modulation and H.264 encoding
Multiple video format compatibility including 576i(PAL) / 480i(NTSC) / 720p / 1080p
Frequency range: 50~860MHz
Continuously adjustable RF attenuation range from 0dB to 30dB, step 1dB
2.4-inch color LCD
Small size and lightweight
User-friendly setup and control
Compact and wall-mountable

The HD Modulator will initialize to the main interface after power on, and press OK into the main menu.
Quick Install
DVB Settings
TS Settings
System Setup
About

QUICK INSTALL

Country: press ◄► key to enter the country list, use ▲▼ the key to select a country, and then press to confirm.
Channel Name: press ◄► key to change the channel number.
Frequency: Frequency setting in the range of 50~860MHz, press ◄► key to move the cursor and press ▲▼ the key to change numbers.
Bandwidth: 6M/7M/8M optional, press ◄► key to switch bandwidth only in DVB-T mode.
RF Attenuation: RF attenuation setting, press ◄► key to change value in a range of 0~30dB, step 1 dB.
Signal Source: press ◄► key to select HD or CVBS.
LCN: use ▲▼◄► key to edit the logical channel number.
Program Name: use ▲▼◄► key to edit the program name.
Remote Key ID: use ▲▼◄► key to edit the ID number for TV program sorting only in ISDB-T mode.
Area Code: use ▲▼◄► key to edit the area code only in ISDB-T mode.

DVB SETTINGS

DVB-T Mode:

Carrier Type: 2K/8K optional.
Constellation: QPSK/QAM-16/QAM-64 optional.
Code Rate: 1/2, 2/3, 3/4, 5/6, 7/8 optional.
Guard Interval: 1/4, 1/8, 1/16, 1/32 optional.

DVB-C Mode:

Symbol Rate: default is 6875kbps.
Constellation: QAM-16/QAM-32/QAM-64/ QAN-128/QAM-256 optional.

ISDB-T Mode:

Carrier Type: 2K/4K/8K optional.
Constellation: QPSK/QAM-16/QAM-64 optional.
Code Rate: 1/2, 2/3, 3/4, 5/6, 7/8 optional.
Guard Interval: 1/4, 1/8, 1/16, 1/32 optional.

TS SETTINGS

NID: Network ID can be modified by ▲▼◄► key (Max 65535).
ONID: Original Network ID can be modified by ▲▼◄► key (Max 65535).
TSID: Transport Stream ID can be modified by ▲▼◄► key (Max 65535).
SID: Service ID can be modified by ▲▼◄► key (Max 65535).
PMT PID: PMT PID can be modified by ▲▼◄► key (Max 8191).
Video PID: video PID can be modified by ▲▼◄► key (Max 8191).
Audio PID: audio PID can be modified by ▲▼◄► key (Max 8191).
Video Bitrate: default is Auto mode, or 1M~20M optional.
Audio Bitrate: 64K/128K/192K/256K/320K optional.
Service Provider: use ▲▼◄►key to edit the service provider.
Network Name: use ▲▼◄►key to edit the network name.

SYSTEM SETUP

OSD Language: press ◄► key to change language, the default is English.
Modulator Mode: DVB-T/DVB-C/ISDB-T optional according to customer requirements.
Key Tone: press ◄► key to ON/OFF key tone.
Factory Set: press OK to confirm factory reset.

ABOUT

Display some information about software and hardware versions.

TECHNICAL SPECIFICATION

DVB- T Mode

Bandwidth| 6M/7M/8M
Carrier| 2K/8K
Constellation| QPSK/QAM-16/QAM-64
Code Rate| 1/2, 2/3, 3/4, 5/6, 7/8
Guard Interval| 1/4, 1/8, 1/16, 1/32
MER| >32dB
Frequency Range| 50 ~ 860MHz
Attenuator| 0 ~ 30dB
Output Impedance| 75Ω
DVB-C Mode
Bandwidth| 8M
Symbol Rate| 6875kbps, editable
Constellation| QAM-16/QAM-32/QAM-64/ QAM-128/QAM-256
MER| >32dB
Frequency Range| 50 ~ 860 MHz
Attenuator| 0 ~ 30dB
Output Impedance| 75Ω
ISDB- T Mode
Bandwidth| 6M
Carrier| 2K/4K/8K
Constellation| QPSK/QAM-16/QAM-64
Code Rate| 1/2, 2/3, 3/4, 5/6, 7/8
Guard Interval| 1/4, 1/8, 1/16, 1/32
---|---
MER| >32dB
Frequency Range| 50 ~ 860MHz
Attenuator| 0 ~ 30dB
Output Impedance| 75Ω
HD Input
Compression| H.264 – bitrate 1-20 Mb/s
*** Video Resolution| 19201080_60P, 1920*1080_50P;