Detailed Product Description

DVB Modulator DMB-2028 is a new DVB-T modulator which especially designed for middle and small terrestrial Digital Television network and enterprise application. DMB-2028 has 1 ASI connector and the RF output is 30-1000MHz, in 1Hz step. It can directly excite small power DTV transmitter. The modulator also contains 3 kinds of test modes: the PRBS sequence, NULL symbol insertion and Central carriers cancellation. DMB-2028 is the most cost effective Modulator in the market.

Main features

• DVB-T & DVB-H supported, fully comply with ETS 300744 and TS101191
• 2K,4K,8K modes supported
• Frequency conversion 30MHz ~1000MHz, in 1Hz step
• RF output level 0dBm, in 0.1dB step
• Bit rate adaption and PCR re-stamping
• 3 kinds of test modes
• Web browser remote control, SNMP is optional
• Optional RF or L band output

SPECIFICATION

• MPEG-TS Input

Comply to EN50083-9 standards

1 ASI input, bit rate adaptation

ASI packet length: 188 Bytes

ASI packet modes: burst/byte

Max. Useful bit rate: 3Mbps~31.67Mbps

(according to ETS 300744)

Connector: 75 ohm BNC

• RF Output

Connector               50ohm N-type

Frequency              30MHz ~ 1000MHz, in 1Hz step

Main Output Level    0dBm

Attenuation             0~10dB in 0.1dB step

Output level            -20 dBm

Level Stability        ±0.5dB

Return Loss           >15dB

I/Q amplitude unbalanced   <0.05%

I/Q quadrature error            <0.05º

MER                                 >40dB

Spurious                           >55dB

• Test Modes

PRBS sequence                23 bit PRBS sequence is substituted to

the pay load of the MPEG-TS packets

NULL symbol insertion      A NULL symbol is inserted at the

beginning of each mega-frame

Central carriers cancelled   251carriers located in the middle of the

spectrum are cancelled

• Modulation and code

Supported Standard     ETS 300744

Supported Modes        DVB-T and DVB-H

FFT                            2K,4K,and 8K  

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

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

Constellations             QPSK, 16QAM, 64QAM

Network mode             MFN

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

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

TPS signal                  DVB-T or DVB-H

• Clock and Synchronization

Internal reference clock 10MHz (TCXO)

Control

Front Panel                   LCD display & cursor/execute keys

Web Server                   Embedded

• Power

Voltage                          AC 90~260V

Frequency                      50~60Hz

Consumption                   Max. 40W

• Mechanical Parameter

Operational temperature   -10~50^oC

Storage temperature        -10~70^oC

Humidity                         10%-95%

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

Weight                            6kg

• ORDING INFORMATION