Signal Generator for Digital Terrstrial Broadcasting
MDSG-031
MDSG-031 is a signal generator conformed to Japanese Digital Terrestrial TV Broadcasting standard (ISDB-T). The device consists of TS data generator, OFDM modulator, Upconverter, Noise generator, PRBS signal generator and BER measurement unit.
Three waves output
The MDSG-031 integrates three upconverters. Each converter can individually program frequencies, output levels and C/N. Each wave can output from three terminals or three combined waves can output from one terminal. As for combined waves, one wave can be used as a main signal, the two other waves as interference signals (interference of adjacent channels).Wideband measurement will be easily realized by assigning three waves to high, middle and low frequency ranges.
Wide dynamic range
The output level can be programmed in the range from -100dBm to +10dBm.
BER measurement (Option)
The MDSG-031 uses PRBS (PN23 or PN15) as transmission data. The injection point of PRBS can be programmed before Reed-Solomon or before/after convolution codes. The device also has a function of BER measurement. (MPEG-TS input)In addition, BER measurement at multiple locations will be enabled with a use of the BCS-010, a BER measurement unit.
Noise Generator
The MDSG-031 can program the noise level (C/N from 0dB to 40dB) to be added to the three waves individually. Inspections to use different C/N for different channels can be made without changing settings.
Fading (Option）
The MDSG-031 can generate fading signals in the three waves individually, which will be used for tests for diversity of mobile receiver.
Output of moving pictures （Option）
By the use of data of moving pictures (MPEG2 TS) stored in the internal memory moving pictures can output. It can be used for aging test process for television sets.
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