DVB-T Remodulator

DMB-4118 Remodulator is employed to increase coverage in DVB-T/H terrestrial digital TV broadcasting network. DMB-4118 receive and demodulate DVB-T/H signal to MPEGTS, then re-modulate it and up convert it to RF channel. 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 Re-modulating

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                  Adjustment range 470 MHz to 862 MHz

Channel Bandwidth      5, 6, 7, 8 MHz

Sensibility range          75~-40dBm

Return loss                 >15dB

Connector                  One Connector, 50 ohm N-type female

RF Output

Connector                  Two Connector, 50ohm N-type female

Frequency                  Adjustment range 170 MHz to 862 MHz in1Hz step

Main Output Level       Signal: 0dBm

Attenuation                 0 to10 dB in 0.1dB step

                                 Level Stability: 0.1dB/10

                                 Return Loss:>15dB

Monitoring Output Level Signal:-20dB

Attenuation:                  0 to 10 dB in 0.1dB step

MER                            >38dB

Shoulder                      >50dB

Spurious                      >50dB

MPEG-TS Input

Packet size                       188Bytes

Maximum useful bit rate       5~31.67Mbps (According to ETS 300744)

Connector                           One connector, 75 ohm BNC

Max delay for static delay        1s(MFN only)

Max delay for automatic delay  1s(SFN only)

MPEG-TS Output

Packet size                        188 Bytes

Maximum useful bit rate       5~31.67 Mbps(According to ETS300744)

Connector One connector,   75 ohm BNC Monitoring ,Loop through

Repeat functions

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

Echo cancellation              Self adaptive

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

Supported Modes            IFFT: 2K, 4K, and 8K

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

Code Rates                    1/2, 2/3, 3/4, 5/6, 7/8

Constellations                 QPSK, 16-QAM, 64-QAM

Hierarchical Modes          16-QAM & 64 QAM in alpha-1, 2 & 4

Network mode                 SFN & MFN

Channel Bandwidth          8MHz, 7MHz, 6MHz, 5MHz

Inner interleave                Native/In depth(DVB-H only)

TPS signalization            DVB-T or DVB-H

Clock and Synchronization

Internal10MHzclock        

Stability< ±0.5ppm

Aging< ±3ppm

Tuning±0.6ppm

External 10 MHz Reference   

Connector: 50ohm BNC

Frequency:10 MHz

Level: -15 to +15dBm

External 1PPS Reference       Connector: BNC

Frequency: 1PPS

Level: TTL level- 5 Kohms

Min Pulse width: 1us

SFN synchronization accuracy  ±200ns

Control

Front Panel                 LCD display and cursor /execute keys

Ethernet                     10/100Base-T

Web Server                 Embedded

SNMP                        Optional

Power

Voltage                      90~250VAC

Frequency                  50~60Hz

Consumption               Max.50W

Harmonic Correction    EN61000-3-2