OFDM Modulator


Pardis DRS-1218 is a cost effective and high capacity OFDM modulator mainly used to replace the Baseband and modulator sections of portable analog radio links. With its powerful
2048/8192 point OFDM engine, this modulator can be easily used in high multi-path channels with dispersive fading. The linearity needed by power amplifiers for OFDM modulation is also achieved by a 6dB back off in transmission path since much less power is needed for keeping the link quality in digital architecture. The pre-OFDM mappings (QPSK, 16-QAM and 64-QAM) give the modulator a good spectral efficiency for using 6/7/8 MHz channel bandwidth for about 32Mbps of input rate. The input to the modulator is built from some or all of the 14 E1 input streams or from the E3 port after passing through the integrated efficient multiplexer. The modulator can also accept DVB MPEG-TS on its E3 or ASI ports and is best matched with Pardis DRS-1228 or any standard professional DVB-T receiver.


Best choice for replacing IF modulator in high performance Portable Microware Radio links (used with .).
1-14E1 input streams support.
6/7/8 MHz channel bandwidth (optional 5MHz).
2K/8K-point OFDM modes support.
Two ASI/E3 inputs for video mode (optional).
DVB MPEG-TS on ASI/E3 support (optional).
Optional DVB-Remux for two ASI/E3 inputs.
Efficient multiplexing of nE1 for n=1, 2, 3, , 14.
Selectable QPSK/16-QAM/64-QAM modulation for high spectral efficiency.
FEC code rates of 1/2, 2/3, 3/4, 5/6 and 7/8 and RS(204/188) for powerful channel coding.
34-70 MHz IF output (1Hz step) with -30 to 0 dBm level (1 dB step).
L-Band output with -30 to 0 dBm level (optional).
Ethernet, RS-232 and local monitoring and control.
High quality frequency domain equalizer.
Compact size of one rack unit.


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