DVM-DME Digital Modulators

ABE manufactures a wide range of latest generation digital modulators, all with high quality and performance, suitable for different purposes.

The main applications are:

• Terrestrial Broadcasting (DVB-T and ATSC standards)
  
• Satellite distribution and contribution (DVB-S and DVB-DSNG standards)
  
• Microwave Links (DVB-S, DVB-C and DVB-DSNG standards)

ABE Modulators employ the latest technology FPGA (Field Programmable Logic Array) and DSP (Digital Signal Processor); modulation schemes are according to the reference standard and include OFDM (DVB-T), 8VSB (ATSC), QPSK (DVB-S), QPSK, 8PSK and 16QAM (DVB-DSNG) and QAM (DVB-C).

Output may be at Intermediate Frequency (IF, according to the standard, at 36 or 44 or 70MHz) or in the VHF, UHF or L bands.

All the modulators are designed to transmit MPEG Transport Stream data (according to the DVB or ATSC standard) and are normally provided with the ASI input interface. The input transport stream, except for some particular cases, is automatically adapted to the data speed (bit-rate) requested by the modulator through adding or discarding null data packets; while carrying out this operation, the modulator also provides the update of the time reference (PCR) in the transport stream (time re-stamping).

Digital modulators are offered by ABE in a wide range of different combinations - for example, a single 19" 1U standard rack chassis can house, besides the digital modulator, up to 4 MPEG-2 encoders and the multiplexer.

Please download the appropriate brochure:

• DVM-1000/T COFDM (DVB-T) IF Modulator (447k)
  
• ATSC987 8VSB (ATSC) IF Modulator (278k)
  
• DVM 1000/S QPSK Modulator (435k)
  
• DVM 1000/C 16QAM Modulator (379k)
  
• DVM 1000/S MPEG-2 Encoder/s + QPSK Modulator 531k)
  
• DVM 1000/C MPEG-2 Encoder/s + 16QAM Modulator (532k)

Please download related Technical Papers:

• QPSK Modulator settings (DVM-1000/S - DME-1000/S Series) (72k)
  
• Digital TV Broadcasting handbook (828k)
  
• DVB-T terrestrial digital transmission handbook (1.5M)

For more information and a quotation please visit our contact page.