User Manual - Clear Vision Systems

Home Modulator AV to DVBT/C
CVBS to DVB-T Encoder & Modulator - Home Use
User Manual
Thank you for buying this encoder modulator.
Please read this manual carefully to install, use and maintain the encoder modulator in the best
conditions of performance. Keep this manual for future reference.
CVBS to DVB-T Encoder & Modulator
CHAPTER 1 Product Introductions
General Description 3
System Connection Chart
Technical Specifications
CHAPTER 2 Safety Instruction and Installations
Safety Instructions
CHAPTER 3 Operations and Management
Home Use
CHAPTER 1 Product Introductions
General Description
It is an all-in-one device integrating MPEG2 encoding and DVB-T modulating to
convert video signals to DVB-T RF out for distribution network.
The signals source could be from satellite receivers, closed-circuit TV, cameras,
Blue-ray players, and antenna etc. Its output signal is to be received by a DVB-T
standard TV, DVB-T STB etc.
CVBS to DVB-T Encoder & Modulator
DC 12V: power input
CVBS: composited video input supporting NTSC and PAL
L/R channel: Stereo Left and Right audio channels
RF in: to combine input RF signal (10 dB attenuation)
RF out: to distribute modulated signal (30-960 MHz, 81~97 dbµV)
System Connection Chart
Home Use
Technical Specifications
Encoding Section
Encoding MPEG-2 MP@ML(4:2:0)
720x576_50i (PAL); 720x480_60i (NTSC)
Bit rate
1.000~19.500 Mbps
MPEG1 Layer II
1*Stereo /mono
Sample rate
Bit rate
64, 96, 128, 192, 256, 320, 384kbps
Modulator Section
6M, 7M, 8M
Code rate
1/2, 2/3, 3/4, 5/6, 7/8.
Guard Interval
1/32, 1/16, 1/8, 1/4.
Transmission Mode:
2K, 8K
RF frequency
30~999MHz, 1KHz step
RF output level
-16~36 dBm (81~97 dbµV), 0.1db step
CVBS to DVB-T Encoder & Modulator
Local control: LCD + control buttons
LCN Insertion
Power supply
DC 12V
< 1kg
Operation temperature
Home Use
CHAPTER 2 Safety Instruction and Installations
Safety Instructions
WARNING: To prevent fire or electrical shock, do not expose the device to rain
or moisture.
The encoder modulator is powered with a voltage of 12V DC. The power supply
voltage must not exceed the recommended voltage, which otherwise may
cause irreparable damage to the device and the invalidation of the warranty.
• Do not replace power supply with a voltage greater than 12V DC.
• Do not connect the device to the power if the power cord is damaged.
• Do not plug the device into mains supply until all cables have been connected
• Do not cut the cord.
Avoid placing the device next to central heating components and in areas of
high humidity.
Do not cover the device with elements that obstruct the ventilation slots.
If the encoder modulator has been kept in cold conditions for a long time, keep it in
a warm room minimum 2 hours before plugging into the mains.
Mount the encoder modulator in vertical position with the connectors located on the
top side.
When replacement parts are required, be sure the service technician has used
replacement parts specified by the manufacturer or have the same characteristics
as the original part. Unauthorized substitutes may result in fire, electric shock or
other hazards.
Safety check- Upon completion of any service or repairs to this device, ask the
service technician to perform safety checks to determine that the device is in proper
CVBS to DVB-T Encoder & Modulator
1. Screw the encoder modulator where you want to install it. Left 10 cm of free space
around from each other once the devices have been installed.
2. Connect cables to audio/video source. The signal source can be from a surveillance monitor, DVD, set-top box, CCTV and etc.
3. Connect cable to RF output to TV.
4. Connect the power to the wall outlet with the power adapter.
Home Use
CHAPTER 3 Operations and Management
NDS3552 is controlled and managed through the key board and LCD display.
LCD Display – It presents the selected menu screen and the parameter settings.
The backlight in the display is on when the power is applied.
LED – These lights indicate the working status
• Power: It lights on when the power supply is connected.
• Alarm: It lights on when the there is error, such as the signal source loss.
• Lock: It lights on when the signal source connected and goes off when the signal
Left/Right/Up/Down buttons – Use these buttons to turn the screen pages, shift
the target items by moving the triangle, or change the parameter settings in the
program mode.
CVBS to DVB-T Encoder & Modulator
Enter – Use this button to enter a submenu or save a new setting after adjustment;
press it to start adjusting the value of certain items when the corresponding underline
flash with Up and Down buttons;
Press it to activate the hidden selections and change the setting with Up and Down
(or Left and Right) buttons.
Menu – Press this button to step back
Lock – Locking the screen / cancelling the lock state, and entering the main menu
after the initialization of the device. After pressing lock key, the system will question
the users to save present setting or not. If not, the LCD will display the current
configuration state.
When the power is connected, the LCD will start to initialize the program. The LCD
menu goes as below chart.
Home Use
1) DVB-T: modulating standard; XX.XXX MHz: the current output frequency; 576i:
video resolution of signal source; X.XX Mbps: the current encoding bit rate
2) Alarm Status: For example, if the CVBS cable disconnected, it will display Video 1
Not Lock under this menu.
3) Uptime: It displays the working time duration of the device. It times upon power
4) Video Parameters: User can enter the items respectively to view the video status
and signal source resolution. User can also adjust values of rest items (Bit rate:
1.000~19.000 Mbps; Brightness & Contrast & Saturation: 0-255; Hue: -128 +127) and select Aspect ratio between 16:9 and 4:3.
5) Audio Bit rate: Select audio bit rate among 64, 96, 128, 192, 256, 320, 384 kbps.
Broadcast: Enable – the output program will broadcast only audio without the
picture; Disable – cancel broadcast mode to resume both audio and video.
6) Program Information: User can enable or disable the program output under menu
Program Output. User can also enter the other items to edit the Service Name,
Program Name, Program Number, and PIDs of PMT, PCR, Video and Audio, and
edit LCN (Logical channel number). EIT Event – User can enter this menu to
setup EIT (Event Information Table) for the current and next program event. The
EIT contains Start Time, Duration, Event Name, and Start Year of the event. All
the EIT information can be displayed on the TV screen on condition that the EIT is
chosen to insert (see explanation 10.).
7) TSID: (Transport Stream ID) User can view or adjust after enter this menu.
8) ONID: (Original Network ID)-User can view or adjust after enter this menu.
9) NIT: (Network Information Table) NIT table is a very important table for describing
the network and TS. User can enter the submenus displayed and edit the values
or select the LCN (Logical channel number) mode, and choose whether to insert
the NIT. If user chooses to insert the NIT, information (Network ID, Network
Name, LCD Mode, Private Data and LCN number of the program mentioned in
explanation 6) will be added to the transport stream.
NOTE: when the Private Data is set as 0*0, it is invalid.
CVBS to DVB-T Encoder & Modulator
10) EIT: EIT Insert - As mentioned above (6), the event information table can be chosen
whether to insert into the TS or not under this menu. If yes, the EIT information
set above (6) will be displayed on the TV screen. Language Code – to set the EIT
language For example, code of the English language is eng. If you set the code
as eng, the EIT displayed will be in English language.
11) Bandwidth: choose between 6M, 7M and 8M.
12) Constellation: DVB-T modulator contains 3 constellation modes – 64 QAM, QPSK
and 16 QAM.
13) FFT (Transmission Mode): Select between 2K and 8K.
14) Guard Interval: Select among 1/32, 1/16, 1/8 and 1/4.
15) Code Rate: It refers to FEC-Forward Error Correction rate. It contains 1/2, 2/3,
3/4, 5/6 and 7/8.
NOTE: The different combination of bandwidth, constellation, guard interval
and code rate (FEC) will form a different output code rate. Please refer to appendix table 2.
16) RF Frequency: Adjust it at range of 30 to 999 MHz. Set it according your regional
situation or inquire your local services.
17) RF Level: Adjust it at range of -16~ -36dBm.
18) RF On: User can choose to turn on or turn off the RF under this menu.
19) Bit Rate: User can read the current modulating bit rate and the maximum bit rate
20) Save Config: Yes/No-to save/give up the adjustment of setting.
21) Load Saved CFG: Yes/No-to load/ not to load the saved configuration.
22) Reset all sets: Yes/No-choose/not choose the factory’s default configuration.
23) LCD Time out: A time limit that LCD will light off. Choose among 5s, 10s, 45s,
60s, 90s and 120s (seconds).
24) Lock Keyboard: Choose Yes to lock the keyboard, when the keyboard will not
applicable to avoid unexpected operations. Choose No to unlock the keyboard.
25) Serial Number: User can view the serial number of this device. It is read-only and unique
26) Version: It displays the version information of this device. Encoder Modulator:
the name of the device; SW: software version number; HW: hardware version
number. User can also press ENTER again to view the published time of this
Home Use
Table 1 Australia Television Frequency/Channels (MHz)
CVBS to DVB-T Encoder & Modulator
Table 2 Recommended MPEG-2 Code Rate
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