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Hangzhou Digicast Electronic Co.,Ltd
 
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Hangzhou Digicast Electronic Co.,Ltd
[China]
Address:
Kangheng Building 6F, Wensan West Road 109# Hangzhou Zhejiang 310012 China
Phone:
86-571-88898666
Contact name:
Ivy Wang , Export Manager
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Hangzhou Digicast Electronic Co.,Ltd



 
DVB Terrestrial Headend System

DVB-T/H Modulator

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DVB-T/H Modulator

Click to enlarge image

 Origin Hangzhou,China
 Model Number DMB-2028

DMB-2028 is a new DVB-T modulator which is especially designed for midium and small terrestrial DTV network and enterprises. DMB-2028 is a high performance DVB-T/H modulator with 1 ASI inputor and RF output,it can directly drive small power DTV transmitter. DMB-2028 modulator also contains 3 kinds of test modes: the PRBS sequence, NULL symbol insertion and Central carriers cancellation.

 

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 <0.05�BR>● MER   >40dB
● Spurious  >55dB

 

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 <0.05�BR>● 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°C
● Storage temperature -10~70°C
● Humidity  10%-95%
● Dimension 318mm(W)�83(L)mm�st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="44" UnitName="mm">44mm(H)
● Weight   6kg



  Packaging 1 pc per carton
  Package Size 483 x 318 x 44   Millimeters
  Package Weight 6  
  Delivery lead time Negociable
  Minimum order 1pc

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