Detailed Product Description

DVB-T Re-modulator DMB-4118 is employed to increase coverage in DVB-T/H terrestrial DTV network. The DVB-T Re-modulator receives and demodulates DVB-T/H signal to MPEG TS, then re-modulates it and upconverts to RF. DMB-4118 adapts advanced echo cancellation arithmetic to cancel the coupling between input and output signals. It supports on channel repeater mode and transposer mode and supports MFN and SFN operation. DMB-4118 is the best choice of terrestrial digital TV operators.

Main features

• DVB-T & DVB-H supported
• Linear and non-linear pre-corrector supported
• Self adaptive echo cancellation Arithmetic
• Intelligent automatic output power management
• Programmable transfer delay
• On channel repeater mode and transposer mode supported
• Web browser remote control, SNMP is optional

SPECIFICATION

• RF Input

Frequency                  470 MHz to 858 MHz

Channel Bandwidth      5, 6, 7, 8 MHz

Sensibility range         75~ -42dBm

Return loss                >15dB

Connector                  50 ohm, N-type female

• RF Output

Connector                  50ohm N-type female

Frequency                 170 MHz to 858 MHz in1Hz step

Main Output Level       0dBm

Level Stability             0.1dB/10

Return Loss                >15dB

Monitoring Output Level       -20dB

MER                         >38dB

Shoulder                    >50dB

Spurious                    >55dB

• MPEG-TS Input

1 DVB-ASI input

Comply to EN 50083-9 ASI

Maximum useful bit rate 3~31.67Mbps (According to ETS 300744)

Packet size                  188 Bytes

MIP processing              bit rate adaption automatically, PCR re-modulation

Connector                      75 ohm BNC

• MPEG-TS Output

1 DVB-ASI monitoring output

ASI loop through

Comply to EN 50083-9 ASI standard

Connector : 75 ohm BNC. Monitoring Loop through

• Repeat functions

Transfer delay time            Max.200us,in step of 0.1us

Echo cancellation             Self adaption

Digital Pre-correction          Support non-linear and linear digital pre-correction

Power Management           Progressive power rising

Automatic power limitation non over coupling

DVB-T/H Signal Processing

Comply to ETS 300744 and TS 101191

• Modulation and coding

FFT                                   2K, 4K, and 8K

FEC                                  1/2, 2/3, 3/4, 5/6, 7/8

Guard Intervals                   1/4, 1/8, 1/16, 1/32

Constellations                    QPSK, 16-QAM, 64-QAM

TPS signalization               DVB-T or DVB-H

Network mode                   SFN & MFN

• Clock and Synchronization

Internal10MHzclock            Stability< ±0.5ppm

Aging< ±3.0ppm

Level:0dBm±3dB

External 10 MHz Reference    Connector: 75ohm BNC

Level: -15 to +15dBm

External 1PPS Reference       Connector: 75ohn, BNC

Level: TTL level- 5 K ohms

Min Pulse width: 1us

SFN synchronization accuracy  ±200ns

• MIP Management

Synchronous information, remote set of modulator parameter

• Control

Front Panel                          LCD display & cursor/execute keys

Web Server                          Embedded

• Power

Voltage                                AC 90~260V

Frequency                           50~60Hz

Consumption                       Max. 50W

• Mechanical Parameter

Operational temperature        0~45

Storage temperature            -20~70

Humidity                             10%-95%

Dimension                           318mm(W)×483(L)mm×44mm(H)

Weight                                6kg