|
|
 |
DDM310 Digital Modem |
The DDM310 is a high speed, highly reconfigurable modem. Configuration concerns the functionality (modulator only, demodulator only, modem), the data-interfaces installed (ASI, DS3, STM-1, E3, E1...), the data rate (up to 310 Mbit/s), the modulation schemes, FEC codes and spectrum filter shaping factor. An advanced 24 taps adaptive equalizer is responsible for the DDM310 robustness to dispersive multipath fading; notch of up to 50dB can be tolerated in QPSK mode. The DDM310 is the ideal equipment to be coupled with digital radio links for communications in difficult situations. Modulations scheme available are QPSK, 16QAM, 32QAM, 64QAM, 128QAM and 256QAM; for each modulations scheme it's possible to set the Baud rate, the Reed Solomon coding, the PTCM/convolutional coding, the roll-off factor of the shaping filters and other parameters.
The configurations installed in the modems will be tailor made. This ensures the best performance, efficient use of bandwidth, nevertheless these configurations can be modified at a later stage.
It's important to underline that the modulator and the demodulator sections can be set with different configurations to implement bidirectional link with different rate between forward and return path.
Features
DVB-ASI, E3, E1, DS3, STS-1, STM-1 data interfaces Data rate over 200 Mbit/s depending on configuration FEC Coding Inner Convolutional interleaved Trellis or block convolutional (rates from 1/2 to 13/14) depending on configuration Outer Reed-Solomon k= 6 to 255, t = 0 to 16
QPSK, 16QAM, 32QAM, 64QAM, 128QAM and 256QAM 24-tap Adaptive Equalizer 70MHz IF Bandwidth 3 to 28 MHz depending on configuration Filter roll-off factor 0.15 to 0.30 depending on configuration Asymmetric configuration for modulator and demodulator part Up to 6 configurations stored in memory for each section RS485 and SNMP remote control interfaces
Data Sheet, User Manual & Info
|
|
|
For further information on this product, 
