Detailed Product Description

MMDS/DTV ,MMDS/DVB  MMDS (Wireless CATV) system total solutions ,Digital QPSK Modulation for system stability, reliability and durability.

Digital MMDS system can spread wireless digital television signal easily and provide plentiful programs for thousands of families, especial for the rural area, It is an effective way of transmitting large number of high quality TV programs in every village. The frequency range of this system is 2.5~2.7 GHz. The digital modulation can adopt DVB-C, DVB-T and DVB-S. It can offer data broadcast, TV conference, internet, VOD, etc.   TELECAST offers the entire set of digital head end equipments, CA, MMDS transmitters, STBs and microwave digital down converters. It also offers the service of designing, installing, testing and so on, then finishes Golden Key project.  

 Features:   

  Saving channels------ every 8MHz can transmit 6~12 PAL/NTSC

TV programs when 64 QAM is adopted.  

  Good quality picturedigital------  signals are decoded and reverted in receiving equipments, which ensures the high quality.

  Far transmission distance----- digita l  transmission has a relatively low condition demands, the direct transmission distance is far, but also capable to carry out the digital signals recycling and repeating so long distance transmission could be operated. CAdigital system can carry out.  

  CA------  conveniently. It simplified the subscribers commission management and charging process.  Self-contained system software------  CAS software, SMS software, NMS software, EPG software.  

  Numerous increment operation ------   it can provide many increment operation, such as digital TV, internet, IP telephone, remote medical treatment, remote education, VOD, etc.    

  Main transmitting center   

 Composed by digital head end equipments and MMDS transmission equipments. In general, it is the main transmission station of the regions and countries. MMDS transmission contains 2 styles of broadband transmission and single channel transmission. There are outdoor and indoor models for broadband transmission. A broadband transmitter can transmit many channels of digital TV signal simultaneously and the coverage is about 50 km in radius; a single channel transmitter can only transmit one channel, while the coverage is over 50 km in radius.  

  System scheme A (Broad Band Transmitter) Main facilities  

digital QPSK converter

MPEG-2 Encoder   

Interface Adaptor

Re-multiplexer  

Scrambler

QAM Modulator(DVB-C)

QPSK Modulator(DVB-S)

COFDM  Modulator(DVB-T)

Digital MMDS Transmitter(Broadband)

 MMDS Transmitting Antenna

 CAS(Server+Software) SMS(Server+Software) NMS(Network Management System software) EPG (SystemServer+Software)  

  System scheme B (Single Channel Transmitter) Main

facilities:    

digital QPSK Converter  

MPEG-2 Encoder  

Interface adaptor  

Re-multiplexer  

Scrambler  

QAM modulator(DVB-C)  

QPSK modulator(DVB-S)  

COFDM modulator(DVB-T)  

Single Channel

Digital MMDS Transmitter  

Power combiner BT-26 ;

Waveguide  MMDS

Transmitting Antenna  

 CAS (Server+Software)  

 SMS(Server+Software)  

 NMS(Network Management System)  

 EPG (SystemServer+Software )