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Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
3. TECHNICAL BRIEF
3.5.9.3 Integrated Demodulator in DVB-H/T IC (U705 : DIB9080H)
The DiB9080H performs all the processing from RF input signal to MPEG-TS outout (in DVB-T mode) and
MPE tables/sections output (in DVB-H mode). The COFDM demodulator embedded in DiB9080H uses the
state of the art Signal Processing to offer high performance for mobile, portable and fixed reception of
Digital Terrestrial Television signals compliant with EN 300.744 DVB-T and ETS 301.192 DVB-H standards.
The integrated tuner uses direct conversion technology for low power consumption. Dual AGC BB/RF is
implemented in order to offer very high dynamic range control through digital. A digital filter with high
rejection capability is added to cope with adjacent channels. Combined with the interpolation function it
allows the circuit to demodulate 8, 7 or 5 MHz channels without changing the analog front-end.
Host Interface offering: SRAM like Interface
The roles of DIB9080H in the DVB-H/T front-end are below :
-. Tuner
DiB9080H controls RF frequency, RF Gain, Base band Gain, Switch on and off
Monitor the Wide Band Detector in order to avoid the saturation of first amplification stage of
the tuner
-.Application processor
Data transfer(MPE tables, sections), Monitoring and configuration
Figure3.5.9.3 DIB9080H Functional Block Diagram
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