Home > Products > Electronics & Electricity > Telecommunication & Broadcasting > Radio TV Equipment

DMB-2028 is a new DVB-T/H modulator which especially designed for middle and small digital terrestrial television broadcast network and enterprise level signal generator market.DMB-2028 is a high performance DVB-T/H modulator which has 0dBm output level in full VHF/UHF frequency range,and contains three kinds of test modes.

Major Features：

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

l       Channel center frequency tunable from 30MHz to 1000MHz(standard version)with 1Hz

l       RF output level 0dBm,in 0.1dB step

l       Remote parameters configuration according to MIP TPS

l       Bit rate adaptation and PCR re-stamping

l       Three kings of test modes

l       Web browser remote control,SNMP is optional

Technical Details

      Input

MPEG-TS                 Comply to EN50083-9 standards

One ASI input,bit rate adaptation

Connector: 75 ohm BNC

ASI packet length: 188 bytes

                                ASI packet modes: burst/byte

                                Max. Useful bit rate: up to 31.67Mbps

      Signal Processing

Supported Standard       ETS 300744

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

Network mode             MFN

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

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

TPS signalization           DVB-T OR DVB-H

      ASI Output

Packet size              188bytes

      RF Outputs

Connector                  Two Connector: 50 ohm N-type

Frequency                Adjustment range 30MHz to 1000MHz,in 0.02Hz step;

Adjustment range 1400MHz to 1700MHz,in 1Hz step step(optional)

Main Output Level              Signal: 0dBm±1dB

Attenuation: 0 to 10dB in 0.1 dB step

                                Level Stability: ± 0.5dB

                                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                            >40dB

Spurious                  >55dB

      Clock and Synchronization

internal reference clock (OCXO)

      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 mega frame

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

cancelled.

      Control

Front Panel                 LCD display and cursor/execute keys

Ethernet                 0/100 Base-T

Web Server                      Embedded

SNMP                     Optional

      Power

Voltage                      90～240VAC

Frequency                   50～60Hz

Consumption                 Max. 40W

Harmonic Correction            EN61000-3-2

      Environmental

Operating Temperature       -10～50 °C

Storage Temperature                -10～70 °C

Humidity operating/storage       max 80% RH

      Mechanical

Width                       318mm

Height                      44mm

Depth                       483mm

Weight                      6kg

Transport and Storage       Vibration acc. To IEC Pub1.68

      Compliance

EMC                            EN50081-1, EN50082-1

                                    EN50081-2, EN50082-2

Safety                      EN60950