Sony DVP-M35 Operation Manual

Also see for DVP-S300: Operating instructions Operating instructions Operating instructions Service manual Training manual

Theinputsignalto IC006DIP_ andDIN_) is a signalprocessedafterEQ blockmentionedlater."1: SingleLayerdisc *2: DualLayerdisc *3: Peakto PeakDifferential(3) EQblockTheEQblockis a programmableequalizerfilter differentiatorblock.TheDVD formatis premisedon theEQ andrequireshighfrequencysignalstobeboosted.ThisblockequalizesRFsignaltogetoptimumRFsignalbycombiningLPFand-EQ(boost),asshownin Figure2-4. LPFisdefinedas-3dBbandwidthwithoutboost.If theamountofboostis settoacertainvalue,thegainatcut-offfrequencyisasfollows:Gain(atcut-offfrequency)= -3dB+ Boostamount[dB]Also,LPFis usedasaprefilterfortheA/D converterprovidedin theinputstageofRFblockof IC in thepoststage(MB78boardIC770).wlv_z10-5-10-150t1 2 3 4 5 6 7 8 9 10FREQUENCY (MHz)---e.--- LPF+EQ--D-- LPFFigure 2-4. Frequency characteristics (EQ+LPF)These cut-off frequency and boost amount of LPF are operated by the commandregister set via serial interface.The RF signal processed in this block is output from IC006 FNP_ and FNN(_). Thissignal is entered to IC006 DIP_ and DIN(_) and rectified in full wave, then comparedin the AGC block. The RF signal output from IC006 SIG(_ is then transmitted to theRF signal processing block IC806 in the post stage.- 17 -