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DMB-2018 is a high-end DVB-T/H modulator，fully support DVB-T/H standards.DMB-2018 can be used to set up digital terrestrial TV Single Frequency Networks and Multi Frequency Networks.DMB-2018 supports hierarchical and non hierarchical modes,digital linear and non-linear pre-correction functionalities.The center frequency of the RF output can be set from 173MHz to 858MHz with a step of 1Hz.DMB-2018 modulator is the best choice of terrestrial digital television operators.

Major Features：

l       DVB-T & DVB-H support, fully comply with ETS300744 and TS101191

l       Powerful ASI input management(redundancy, automatic switching,bit rate adaptation)

l       SNF and MFN operation supported

l       Linear and non-linear pre-corrector supported

l       Remote parameters configuration according to MIP TPS

l       All DVB-T&DVB-H modes supported, including hierarchical modes

l       Web browser remote control,SNMP is optional

Technical Details

      Inputs

MPEG-TS                  Comply to EN50083-9 standard

4 ASI inputs

Connector: 75 ohm BNC

ASI packet length: 188/204 byte without RS coding and 204 bytes with RS coding

ASI packet modes: burst/byte

Bit rate:5～31.67Mbps

Bit rate adaptation and PCR restamping

                                Max delay for static delay: 1s (MFN only)

                                Max delay for seamless switching: 1s (SFN only)

                                Max delay for automatic delay: 1s (SFN only)

Powerful ASI input management: redundancy, automatic switching

Internal 10MHz clock        Stability < ± 5.10-9

                         Aging   < ± 3.10-8

                                Tuning ±0.6 ppm                    

External 10MHz Reference     Connector: 50ohm BNC

                                Frequency: 10MHz

                                Level: -15 to +15 dBm

                                Impedance: 50ohm

External 1PPS Reference     Connector: BNC

                                Frequency: 1PPS

                                Level: TTL level -5 Kohms

                                Min Pulse width: 1us

SFN synchronization accuracy   ± 200ns

      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&64QAM 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

      RF Output

Connector                  Two Connector: 50 ohm N-type female

Frequency                Adjustment range 173MHz to 858MHz, level 0dBm, in 1Hz step;

Main Output Level              Signal: 0dBm±2dB

Attenuation: 0 to 10dB in 0.1dB step

                                Level Stability: ± 0.1dB/10°C

                                Return Loss: >15dB

Monitoring Output Level     Signal: -20dB±2dB

Attenuation: 0 to 10dB in 0.1 dB step

I/Q amplitude unbalanced     <0.05%

I/Q quadrature error          <0.05°

MER                            >38dB

Spurious                  >50dB

      Test Modes

PRBS sequence               23 bit PRBS sequence is substituted to the payload of the

MPEG-TS packets

NULL symbol insertion    A NULL symbol is inserted at the beginning of each megaframe

Central carriers cancelled  251 carriers located in the middle of the spectrum are

cancelled.

      Precorrection

Non-Linear Pre-Correction

Non-linear pre-correction over a 20MHz bandwidth

Curve Formats: S21 and VO/VI

Amplitude Scale: Linear and Logarithmic

Correction Points: Max.256

Linear Pre-Correction

                          Correction Points: 21

                                Amplitude correction: ± 10dB

                                Amplitude Resolution: 0.01dB

      Control

Front Panel                 LCD display & cursor/execute keys

Ethernet                 0/100 BASE-T

Web Server                       Embedded

SNMP                     Optional

      Power

Voltage                      90～240V AC

Frequency                   50～60Hz

Consumption                 Max. 40W

Harmonic Correction            EN61000-3-2

      Mechanical

Width                       318mm

Height                      44mm

Depth                       483mm

Weight                      6kg