14Appendix B: Block Diagram12310 BAND EQFIXED EQVR SOLIDSTATEMIXERSEND50 mV, IN0 dB TO +4dBRETURN2 BANDCONTOURPREPOSTAMPPROTECTIONGND. LIFT/ NORMAL50 mV, IN-20 dB TO -30 dBMASTER SECTION10 BAND OUT10 BAND INVR TUBERMSDETECTORCOMPRESSVCACOMPRESSORIN/OUT SWITCHModel 3500